This is a list of Wikipedia articles about search engines, including web search engine

Web search engine

A web search engine is designed to search for information on the World Wide Web and FTP servers. The search results are generally presented in a list of results often referred to as SERPS, or "search engine results pages". The information may consist of web pages, images, information and other...

s, selection-based search

Selection-based search

A selection-based search system is a search engine system in which the user invokes a search query using only the mouse. A selection-based search system allows the user to search the internet for more information about any keyword or phrase contained within a document or webpage in any software...

 engines, metasearch engine

Metasearch engine

A metasearch engine is a search tool that sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines...

s, desktop search

Desktop search

Desktop search is the name for the field of search tools which search the contents of a user's own computer files, rather than searching the Internet...

 tools, and web portal

Web portal

A web portal or links page is a web site that functions as a point of access to information in the World Wide Web. A portal presents information from diverse sources in a unified way....

s and vertical market

Vertical market

A vertical market is a group of similar businesses and customers that engage in trade based on specific and specialized needs. Often, participants in a vertical market are very limited to a subset of a larger industry...

 websites that have a search facility for online database

Online database

An online database is a database accessible from a network, including from the Internet.It differs from a local database, held in an individual computer or its attached storage, such as a CD....

s.

General

• Baidu
  Baidu
  Baidu, Inc. , simply known as Baidu and incorporated on January 18, 2000, is a Chinese web services company headquartered in the Baidu Campus in Haidian District, Beijing, People's Republic of China....
  
   (Chinese, Japanese)
• Bing
  Bing
  Bing is a web search engine from Microsoft.Bing may also refer to:* An onomatopœia of a bell sound* Bing cherry, a variety of cherry* Bing , Chinese flatbread* Bing , a German company that manufactured toys and kitchen utensils...
  
  
• Blekko
  Blekko
  Blekko is a web search engine whose goal is to provide better search results than those offered by Google Search, by offering results culled from a set of 3 billion trusted websites and excluding material from such sites as content farms...
  
  
• DuckDuckGo
• Google
  Google search
  Google or Google Web Search is a web search engine owned by Google Inc. Google Search is the most-used search engine on the World Wide Web, receiving several hundred million queries each day through its various services....
  
  
• Sogou
  Sogou
  Sogou.com is a Chinese search engine which can search text, images, music, and maps. It was launched 4 August 2004 and is owned by Sohu, Inc.. As of April 2010, it has a rank of 121 in Alexa's internet rankings. Sogou provides an index of up to 10 billion web pages. Its major domestic competitor...
  
   (Chinese)
• Soso.com
  Soso.com
  Soso.com is a Chinese search engine owned by Tencent Holdings Limited, which is well known for its other creation QQ. , Soso.com is ranked as the 54th most visited website in the world and 8th most visited website in People's Republic of China, according to Alexa Internet.On an average, Soso.com...
  
   (Chinese)
• Yahoo!
  Yahoo! Search
  Yahoo! Search is a web search engine, owned by Yahoo! Inc. and was , the 2nd largest search engine on the web by query volume, at 6.42%, after its competitor Google at 85.35% and before Baidu at 3.67%, according to Net Applications....
  
  
• Yandex
  Yandex
  Yandex is a Russian IT company which operates the largest search engine in Russia and develops a number of Internet-based services and products. Yandex is ranked as 5-th world largest search engine...
  
   (Russian)
• Yebol
  Yebol
  Yebol is a vertical "decision" search engine that had developed a knowledge-based, semantic search platform. Based in San Jose, CA, Yebol's artificial intelligence human intelligence-infused algorithms automatically cluster and categorize search results, web sites, pages and contents that it...
  
  
• Yodao
  Yodao
  Youdao is a search engine released by Chinese internet leviathan, NetEase in 2007. It is the featured search engine of its parent company's web portal, 163.com, and lets users search for web pages, images, news, music, blogs, Chinese-to-English dictionary entries, and more.Youdao hopes to...
  
   (Chinese)
• WireDoo
  WireDoo
  WireDoo is an Internet search engine that is currently in the pre-beta stage. It will be launched by MC Hammer, who says it will include a "deep search" ability and related topics that Bing and Google do not offer, and that its use is "about relationships beyond the keywords." It was first...
  
  

P2P search engines

• FAROO
  FAROO
  FAROO is a universal web search engine based on peer-to-peer technology. It uses a distributed crawler that stores search data on users' computers instead of a central server. Whenever a user visits a website, it is automatically indexed and distributed to the network...
  
  
• Seeks
  Seeks
  Seeks is an open source project licensed under the AGPLv3. Seeks goal is to create an alternative search engine to the current commercially available market leading search engines that is driven by user concerns rather than corporate interests. The original manifesto was created by Emmanuel...
  
   (Open Source)
• YaCy
  YaCy
  YaCy is a free distributed search engine, built on principles of peer-to-peer networks. Its core is a computer program written in Java distributed on several hundred computers, , so-called YaCy-peers...
  
   (Free and fully decentralized)

Metasearch engines

• Brainboost
  Brainboost
  Brainboost is a metasearch engine designed to provide specific answers to questions asked in natural language. Currently it only supports English. The Brainboost engine uses machine learning and natural language processing AI techniques to answer the questions.Traditional engines return the links...
  
  
• ChunkIt!
  ChunkIt!
  yolink is a powerful search technology developed by TigerLogic that mines links and documents to retrieve keyword-rich blocks of information.-Description:...
  
  
• Clusty
  Clusty
  Clusty was a metasearch engine developed by Vivísimo which offered clusters of results. It is now known as Yippy. Vivísimo is a company built on Web search technology developed by Carnegie Mellon University researchers, much like Lycos was a decade earlier. Clusty added new features and a new...
  
  
• DeeperWeb
  DeeperWeb
  DeeperWeb is a free search engine tool for Google users that allows navigating through search results by employing tag cloud techniques. Additional technologies such as Topic-Mapping methods are implemented to assist users in identifying relevant results upon a specific topic.The tool allows...
  
  
• Dogpile
  Dogpile
  Dogpile is a metasearch engine that fetches results from Google, Yahoo!, Bing, Ask.com, About.com and several other popular search engines, including those from audio and video content providers. It is a registered trademark of InfoSpace, Inc.- History :...
  
  
• Excite
  Excite
  Excite is a collection of Internet sites and services owned by IAC Search & Media, which is a subsidiary of InterActive Corporation . Launched in 1994, it is an online service offering a variety of content, including an Internet portal, a search engine, a web-based email, instant messaging, stock...
  
  
• Harvester42
  Harvester42
  The Harvester42 is a meta search engine project hosted at KIT Karlsruhe Institute of Technology. Harvester42 queries over 30 major search engines in parallel and presents a large result page with the individual search engine results. The name "Harvester42" originates from the Bioinformatic...
  
  
• HotBot
  HotBot
  HotBot is a web search engine launched in May 1996 by Wired Magazine. It is currently owned by Lycos. HotBot became a popular tool with search results served by the Inktomi database and directory results provided originally by LookSmart and then the Open Directory Project since mid-1999...
  
  
• Info.com
  Info.com
  Info.com is a metasearch engine which provides results from leading search engines and pay-per-click directories, including Google, Yahoo!, Bing.com, Ask, LookSmart, About and Open Directory....
  
  
• Ixquick
  Ixquick
  Ixquick is a metasearch engine based in New York and the Netherlands. Ixquick was founded by David Bodnick in 1998, from New York...
  
  
• Kayak
  Kayak.com
  KAYAK is a technology company providing online travel tools through its global family of websites and mobile applications. Started by cofounders of Expedia, Orbitz, and Travelocity, KAYAK allows users to compare information from hundreds of other travel websites in one display when booking travel...
  
  
• LeapFish
  LeapFish
  Leapfish.com and its parent company, dotnext, web site are both down. Their sites no longer display their homepages.LeapFish.com is a search aggregator that retrieves results from other portals and search engines, including Google, Bing and Yahoo!, and also search engines of Blogs, Videos etc...
  
  
• Mamma
• Metacrawler
  MetaCrawler
  MetaCrawler is a metasearch engine that blends the top web search results from Google, Yahoo!, Bing , Ask.com, About.com, MIVA, LookSmart and other popular search engines. MetaCrawler also provides users the option to search for images, video, news, yellow pages and white pages...
  
  
• MetaLib
  MetaLib
  MetaLib is a federated search system developed by Ex Libris Ltd. MetaLib conducts simultaneous searches in multiple, and often heterogeneous, information resources such as library catalogs, journal articles, newspapers and selected quality Internet resources. The resources are often subscription...
  
  
• Mobissimo
  Mobissimo
  Mobissimo is a travel search engine website based in San Francisco, California. It allows consumers to compare prices on flights, hotels, and car rentals. It aggregates the results from over 180 online travel agencies, consolidators, and ticket vendors to show a side-by-side comparison of the...
  
  
• Myriad Search
  Myriad Search
  Myriad Search was a metasearch engine developed by Aaron Wall which offered ad-free search results. Myriad Search allowed users to select search results from Ask Jeeves, Google, MSN, and Yahoo! It was trialled from 16 September, 2005, but in February 2006 Wall made the source code available as...
  
  
• SideStep
  SideStep
  - Description :SideStep is a metasearch engine for travel: it searches and consolidates results from more than 200 travel websites. The site searches more than 150,000 hotels and 600 airlines in the United States and worldwide...
  
  
• Turbo10
  Turbo10
  Turbo10.com, established in 2000, was an Internet metasearch engine which uncovered information in the Invisible Web. Turbo10 could access information from 800 online databases and searches 10 databases simultaneously ....
  
  
• WebCrawler
  WebCrawler
  WebCrawler is a metasearch engine that blends the top search results from Google, Yahoo!, Bing Search , Ask.com, About.com, MIVA, LookSmart and other popular search engines. WebCrawler also provides users the option to search for images, audio, video, news, yellow pages and white pages...
  
  

Geographically limited scope

• Accoona
  Accoona
  Accoona was an internet company having offices in Jersey City, New Jersey and Shanghai, China. Their main product was a search engine that claimed to use artificial intelligence to better understand searches. On June 23, 2005, in the ABC Times Square studios, the AI Accoona Toolbar, driven by a...
  
  , China
  China
  Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
  
  /United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  
• Alleba
  Alleba
  Alleba is a Philippine web search engine. It was created in 2001 by Filipino web designer Andrew dela Serna. Alleba started as a project to index the best Filipino websites in a directory format and is one of the first local directories behind those such as Yehey and Tanikalang Ginto. In 2004 it...
  
  , Philippines
• Ansearch
  Ansearch
  Ansearch is an Australia based-internet company. Their main product is a search engine. The search engine Ansearch.com.au was launched in early December 2004.-Key Distinguishing Features:...
  
  , Australia
  Australia
  Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
  
  /United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  /United Kingdom
  United Kingdom
  The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
  
  /New Zealand
  New Zealand
  New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...
  
  
• Biglobe
  BIGLOBE
  is one of the leading internet service providers in Japan, operated by NEC BIGLOBE, Ltd., a 2006 spin-off from NEC.-References:...
  
  , Japan
  Japan
  Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
  
  
• Daum, Korea
  Korea
  Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...
  
  
• Goo
  Goo (search engine)
  goo is an internet search engine and web portal based in Japan, which crawls and indexes primarily Japanese language websites. goo is operated by the Japanese NTT Resonant, a subsidiary of NTT Communications.-External links:* *...
  
  , Japan
  Japan
  Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
  
  
• Guruji.com
  Guruji.com
  Guruji.com is an Indian Internet search engine that is focused on providing better search results to Indian consumers, by leveraging proprietary algorithms and data in the Indian context.-The Concept:...
  
  , India
  India
  India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
  
  
• Leit.is
  Leit.is
  Leit.is an Icelandic internet search engine developed by the corporation Leit.is ehf. It is available both in an Icelandic and an English version and was launched on June 16, 1999...
  
  , Iceland
  Iceland
  Iceland , described as the Republic of Iceland, is a Nordic and European island country in the North Atlantic Ocean, on the Mid-Atlantic Ridge. Iceland also refers to the main island of the country, which contains almost all the population and almost all the land area. The country has a population...
  
  
• Maktoob
  Maktoob
  Maktoob Inc. is an Arab Internet services company, founded in Amman, Jordan known for being the first Arabic/English email service provider. "Maktoob" in Arabic means "letter", "written", or "Destiny". Maktoob today has more than 280 employees with offices in Amman, Dubai, Cairo, Riyadh, and...
  
  , Arab World
  Arab world
  The Arab world refers to Arabic-speaking states, territories and populations in North Africa, Western Asia and elsewhere.The standard definition of the Arab world comprises the 22 states and territories of the Arab League stretching from the Atlantic Ocean in the west to the Arabian Sea in the...
  
  
• Onkosh
  Onkosh
  Onkosh was an Orascom Telecom product that functioned as a search portal for the Arabic Web. Onkosh was launched in September 2007 and closed down on August 11, 2010...
  
  , Arab World
  Arab world
  The Arab world refers to Arabic-speaking states, territories and populations in North Africa, Western Asia and elsewhere.The standard definition of the Arab world comprises the 22 states and territories of the Arab League stretching from the Atlantic Ocean in the west to the Arabian Sea in the...
  
  
• Miner.hu
  Miner.hu
  Miner.hu is a vertical search engine for searching blogs, videos and other Hungarian content on the internet. As of May 2008, Miner.hu indexes about 167,000 blogs, and knows about 8,100,000 blog entries and about 1,300,000 videos which makes it the largest Hungarian blogsearch and video search engine...
  
  , Hungary
  Hungary
  Hungary , officially the Republic of Hungary , is a landlocked country in Central Europe. It is situated in the Carpathian Basin and is bordered by Slovakia to the north, Ukraine and Romania to the east, Serbia and Croatia to the south, Slovenia to the southwest and Austria to the west. The...
  
  
• Najdi.si
  Najdi.si
  Najdi.si is a Slovenian search engine and web portal created by . It's the most visited website in Slovenia. It uses a technology created by Interseek. The technology is written entirely in Java.-Links:**...
  
  , Slovenia
  Slovenia
  Slovenia , officially the Republic of Slovenia , is a country in Central and Southeastern Europe touching the Alps and bordering the Mediterranean. Slovenia borders Italy to the west, Croatia to the south and east, Hungary to the northeast, and Austria to the north, and also has a small portion of...
  
  
• Naver, Korea
  Korea
  Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...
  
  
• Rambler
  Rambler (portal)
  Rambler is a Russian search engine and one of the biggest Russian web portals. It is owned by the Rambler Media Group, which has belonged to Prof-Media since 2006....
  
  , Russia
  Russia
  Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
  
  
• Rediff, India
  India
  India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
  
  
• SAPO, Portugal
  Portugal
  Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...
  
  /Angola
  Angola
  Angola, officially the Republic of Angola , is a country in south-central Africa bordered by Namibia on the south, the Democratic Republic of the Congo on the north, and Zambia on the east; its west coast is on the Atlantic Ocean with Luanda as its capital city...
  
  /Cabo Verde/Mozambique
  Mozambique
  Mozambique, officially the Republic of Mozambique , is a country in southeastern Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west and Swaziland and South Africa to the southwest...
  
  
• Search.ch
  Search.ch
  search.ch is a search engine and web portal for Switzerland. It was founded in 1995 by Rudolf Räber and Bernhard Seefeld as a regional search engine. In the following years many other services were added, such as a phonebook in 1999, a free SMS service in 2000...
  
  , Switzerland
  Switzerland
  Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....
  
  
• Sesam
  Sesam
  Sesam was a Scandinavian internet search engine developed by the media corporation Schibsted. It was available both in a Norwegian and Swedish version and was launched on 1 November 2005. By 2007 Sesam.no had 480,000 unique users and was among the 12 largest web sites in Norway...
  
  , Norway
  Norway
  Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...
  
  , Sweden
  Sweden
  Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....
  
  
• Seznam, Czech Republic
  Czech Republic
  The Czech Republic is a landlocked country in Central Europe. The country is bordered by Poland to the northeast, Slovakia to the east, Austria to the south, and Germany to the west and northwest....
  
  
• Walla!, Israel
  Israel
  The State of Israel is a parliamentary republic located in the Middle East, along the eastern shore of the Mediterranean Sea...
  
  
• Yandex
  Yandex
  Yandex is a Russian IT company which operates the largest search engine in Russia and develops a number of Internet-based services and products. Yandex is ranked as 5-th world largest search engine...
  
  , Russia
  Russia
  Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
  
  
• Yehey!
  Yehey!
  Yehey! is a Philippine web portal.The company was formed in 1996 as Fiesta Online Corporation by a group of young pioneers composed of Alistair Israel, David Quitoriano, Terence Siy, Raymund Cruz and Ian Lat....
  
  , Philippines
• ZipLocal
  Ziplocal
  - History :Ziplocal was first created when Montreal-based Zip411.net was acquired by Redcity Search Company in 2008 a few years after Zip411 pleaded guilty in a Montreal court to deceptive telemarketing and misleading advertising charges under the Competition Act, stemming from complaints filed...
  
  , Canada
  Canada
  Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
  
  /United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  

Business

• Business.com
  Business.com
  Business.com is a business search engine and web directory and pay per click advertising network. It includes Work.com, a business-to-business community publishing platform where experts share advice on common business topics in the form of how-to guides....
  
  
• GlobalSpec
  GlobalSpec
  GlobalSpec, Inc. is a technology services company which provides a search engine of engineering and industrial products, indexing over 180 million parts divided into 2,300,000 product families, from over 24,000 manufacturer and distributor catalogs. GlobalSpec is a domain-specific tool, in that...
  
  
• Nexis (Lexis Nexis)
  LexisNexis
  LexisNexis Group is a company providing computer-assisted legal research services. In 2006 it had the world's largest electronic database for legal and public-records related information...
  
  
• Thomasnet (United States
  United States
  The United States of America is a federal constitutional republic comprising fifty states and a federal district...
  
  )
• GenieKnows
  GenieKnows
  GenieKnows is a division of IT Interactive Services Inc., a privately owned vertical search engine company based in Halifax, Nova Scotia. Like many internet search engines, its revenue model centers on an online advertising platform and B2B transactions...
  
   (United States and Canada
  Canada
  Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
  
  )

Enterprise

• AskMeNow
  AskMeNow
  AskMeNow Inc. was an American public corporation, specializing in mobile search and mobile advertising. The Irvine, California based company officially launched in November 2005 and ceased operations in late 2008...
  
  : S3 - Semantic Search Solution
• Concept Searching Limited
  Concept Searching Limited
  Concept Searching Limited is a software company which specializes in information retrieval software. Its has products for Enterprise search, Taxonomy Management and Statistical classification.-History:...
  
  : concept search products
• Coveo
  Coveo
  Coveo is a provider of enterprise search technology and customer information access solutions.Coveo offers search interfaces for computer desktops, Blackberry smartphones and web browsers, as well as integrated plug-ins for Microsoft Outlook and SharePoint. API’s also allow custom integration with...
  
  : Coveo Enterprise Search platform, Coveo Expresso
• Dieselpoint: Search & Navigation
• dtSearch: dtSearch Engine (SDK), dtSearch Web
• Endeca: Information Access Platform
• Exalead
  Exalead
  Exalead is a software company that provides search platforms and search-based applications for consumer and business users. The company is headquartered in Paris, France, and is a subsidiary of Dassault Systèmes .- CloudView Platform :...
  
  : exalead one:enterprise
• Expert System S.p.A.
  Expert System S.p.A.
  Expert System is a software company, founded in Italy in 1989, pioneer in developing and marketing semantic technologies to understand and manage unstructured information. Expert System's semantic approach, thanks to its capability of natural language processing, enables a rapid and complete...
  
  : Cogito
• Fast Search & Transfer
  Fast Search & Transfer
  Fast Search & Transfer ASA is a Norwegian company based in Oslo. FAST focuses on data search technologies. It also has offices located in Germany, Italy, Sri Lanka, France, Japan, the United Kingdom, the United States, Brazil, Mexico and other countries around the world. The company was founded...
  
  : Enterprise Search Platform (ESP), RetrievalWare
  RetrievalWare
  RetrievalWare is an enterprise search engine emphasizing natural language processing and semantic networks which was commercially available from 1992 to 2007 and is especially known for its use by government intelligence agencies.- History :...
  
   (formerly Convera)
• Funnelback
  Funnelback
  Funnelback is both an enterprise search engine and the name of the company selling the technology. Funnelback is used by many Australian universities and government organisations to search for information on their websites, intranets, file-shares and databases.- History :Funnelback was originally...
  
  : Funnelback Search
• IBM
  IBM
  International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...
  
  : OmniFind Enterprise Edition
• Inbenta
  Inbenta
  Inbenta is a company based in Barcelona, Spain which focuses on data search technologies. Inbenta has also offices in Madrid, and partnership presence in other countries around the world...
  
  : Inbenta Semantic Search Engine
• ISYS Search Software
  ISYS Search Software
  ISYS Search Software is a global leader in high performance enterprise search software and universal information access solutions. The company develops a suite of search, mobile access and information management infrastructure technologies....
  
  : ISYS:web, ISYS:sdk
• Jumper 2.0
  Jumper 2.0
  Jumper 2.0, is an open source web application script for collaborative search and knowledge management powered by a shared enterprise bookmarking engine that is a fork of KnowledgebasePublisher[]. It was publicly announced on 29 September 2008,...
  
  : Universal search powered by Enterprise bookmarking
  Enterprise bookmarking
  Enterprise bookmarking is a method for Enterprise 2.0 users to tag, organize, store, and search bookmarks of both web pages on the Internet and data resources stored in a distributed database or fileserver...
  
  
• Microsoft
  Microsoft
  Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...
  
  : SharePoint Search Services
• Northern Light
  Northern Light Group
  Northern Light Group, LLC is a company specializing in strategic research portals, enterprise search technology, and text analytics solutions. The company provides custom, hosted, turnkey solutions for its clients using the software as a service delivery model. Northern Light markets its...
  
  
• Open Text
  Open text
  In semiotic analysis, an open text is a text that allows multiple or mediated interpretation by the readers. In contrast, a closed text leads the reader to one intended interpretation....
  
  : Hummingbird
  Hummingbird Ltd.
  Hummingbird Ltd. is a subsidiary of Open Text and is a provider of enterprise software solutions including Exceed. Initially founded as a consulting business in 1984, Hummingbird evolved into a strong player in the connectivity market...
  
   Search Server, Livelink Search
• Oracle Corporation
  Oracle Corporation
  Oracle Corporation is an American multinational computer technology corporation that specializes in developing and marketing hardware systems and enterprise software products – particularly database management systems...
  
  : Secure Enterprise Search 10g
• SAP
  SAP AG
  SAP AG is a German software corporation that makes enterprise software to manage business operations and customer relations. Headquartered in Walldorf, Baden-Württemberg, with regional offices around the world, SAP is the market leader in enterprise application software...
  
  : TREX
• TeraText
  TeraText
  TeraText is a non-relational text database. It is used to store and search through large amounts of textual data. It was originally developed at Royal Melbourne Institute of TechnologyTeraText operation utilises a heavy client server model...
  
  : TeraText Suite
• Vivisimo
  Vivísimo
  Vivisimo is a privately held enterprise search software company in Pittsburgh that develops and sells software products to improve search on the web and in enterprises...
  
  : Vivisimo Clustering Engine
• X1 Technologies : X1 Enterprise Search
• ZyLAB Technologies
  ZyLAB Technologies
  ZyLAB is a developer of software for e-Discovery, Information Management, Email Management, Records, Contract,- and Document Management, Knowledge Management, and Workflow. The company is head quartered in McLean, Virginia and in Amsterdam, the Netherlands...
  
  : ZyIMAGE Information Access Platform

Food/Recipes

• Yummly
  Yummly
  Yummly is a semantic web search engine for food, cooking and recipes. It ‘understands’ food on a variety of levels, allows users to search by ingredient, diet, allergy, nutrition, price, cuisine, time, taste, meal courses and sources, and ‘learns’ about users based on their likes and dislikes....
  
  : semantic recipe search
• RecipeBridge
  RecipeBridge
  RecipeBridge is a vertical search engine for recipes,founded by Milwaukee based entrepreneurs Andy Theimer and BillBrennan. It was established in December 2007 and a beta version was launched in 2008 which makes it the oldest dedicated recipe search engine on the web.The current version was...
  
  : vertical search
  Vertical search
  A vertical search engine, as distinct from a general web search engine, focuses on a specific segment of online content. The vertical content area may be based on topicality, media type, or genre of content. Common verticals include shopping, the automotive industry, legal information, medical...
  
   engine for recipe
  Recipe
  A recipe is a set of instructions that describe how to prepare or make something, especially a culinary dish.-Components:Modern culinary recipes normally consist of several components*The name of the dish...
  
  s

Job

• Bixee.com
  Bixee.com
  Bixee.com is a job search engine for India, and an example of both vertical search and metasearch. It was launched in late 2005. Bixee was founded by Ruban Phukan and Rajesh Warrier who started the company RHR Networks Private Limited...
  
   (India)
• CareerBuilder.com (USA)
• Craigslist
  Craigslist
  Craigslist is a centralized network of online communities featuring free online classified advertisements, with sections devoted to jobs, housing, personals, for sale, services, community, gigs, résumés, and discussion forums....
  
   (by city)
• Dice.com
  Dice.com
  Dice.com is a career website based in Urbandale, Iowa. It serves information technology and engineering professionals. Dice.com is owned by Dice Holdings, Inc ....
  
    (USA)
• Eluta.ca
  Eluta.ca
  Eluta.ca is a job search engine that specializes in locating jobs in Canada. The Toronto-based search engine was launched on June 8, 2006 by the principals of Mediacorp Canada Inc., a specialty Canadian publisher of employment periodicals...
  
   (Canada)
• Hotjobs.com (USA)
• Incruit
  Incruit
  Incruit Corporation , is an Internet corporation, established in 1998, that manages the Incruit.com providing Internet Resume and jobs. Incruit Corporation is headquartered at the Seoul in Korea, and employs over 200 people. Incruit is the first Internet recruiting marketplace site between job...
  
   (Korea)
• Indeed.com
  Indeed.com
  Indeed.com is a metasearch engine for job listings launched in November 2004. As a single-topic search engine, it is also an example of vertical search. The site aggregates job listings from thousands of websites, including job boards, newspapers, associations, and company career pages. Job seekers...
  
   (USA)
• LinkUp.com
  LinkUp (website)
  LinkUp is a job search engine that aggregates its job listings from employer websites, typically an employer's applicant tracking system. The objective of acquiring its job listings in this way is to prevent fraudulent and duplicate listings while bringing attention to unadvertised listings –...
  
   (USA)
• Monster.com
  Monster.com
  Monster.com is one of the largest employment websites in the world, owned and operated by Monster Worldwide, Inc. Monster is one of the 20 most visited websites out of 100 million worldwide, according to comScore Media Metrics...
  
   (USA), (India)
• Naukri.com
  Naukri.com
  Naukri.com is a job site operating in India founded by Sanjeev Bikhchandani in March 1997. It publishes a monthly report called Naukri JobSpeak.-History:...
  
   (India)
• Yahoo! HotJobs (Countrywise subdomains, International)

Legal

• WestLaw
  Westlaw
  Westlaw is one of the primary online legal research services for lawyers and legal professionals in the United States and is a part of West. In addition, it provides proprietary database services...
  
  
• Lexis (Lexis Nexis)
  LexisNexis
  LexisNexis Group is a company providing computer-assisted legal research services. In 2006 it had the world's largest electronic database for legal and public-records related information...
  
  

• Google Scholar
  Google Scholar
  Google Scholar is a freely accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes most peer-reviewed online journals of Europe and America's largest...
  
  
• Quicklaw
  Quicklaw
  LexisNexis Quicklaw is a Canadian electronic legal research database that provides court decisions from all levels, news reports, provincial and federal statutes, journals, and other legal commentary...
  
  
• Manupatra
  Manupatra
  Manupatra are publishers and providers of legal, tax, corporate and business policy databases in India.-History:The Company started operations in 2000 and launched its flagship product, the online database www.manupatra.com in August 2001. Today, it has delivery capabilities in print and...
  
  

Medical

• Bing Health
• Bioinformatic Harvester
• EB-eye EMBL-EBI's Search engine
• Entrez
  Entrez
  The Entrez Global Query Cross-Database Search System is a powerful federated search engine, or web portal that allows users to search many discrete health sciences databases at the National Center for Biotechnology Information website...
  
   (includes Pubmed
  PubMed
  PubMed is a free database accessing primarily the MEDLINE database of references and abstracts on life sciences and biomedical topics. The United States National Library of Medicine at the National Institutes of Health maintains the database as part of the Entrez information retrieval system...
  
  )
• GenieKnows
  GenieKnows
  GenieKnows is a division of IT Interactive Services Inc., a privately owned vertical search engine company based in Halifax, Nova Scotia. Like many internet search engines, its revenue model centers on an online advertising platform and B2B transactions...
  
  
• GoPubMed
  GoPubMed
  GoPubMed is a knowledge-based search engine for biomedical texts. TheGene Ontology and Medical Subject Headings serve as "Table of contents" in order to structure the millions of articles of the MEDLINE database. The search engine allows its users to find relevant search results significantly...
  
   (knowledge-based: GO - GeneOntology and MeSH - Medical Subject Headings)
• Healia
  Healia
  Healia is a health vertical search engine and online health community. Healia's search engine uses algorithms to assess quality and to categorize Web documents. Healia Communities is composed of online health support groups that enable people to share health experiences, connect with others, and...
  
  
• Healthline
  Healthline
  Healthline Networks is a privately-owned provider of online health information for publishers, advertisers and health plans.-Overview:Healthline Networks is a privately-owned provider of online health information for publishers, advertisers and health plans. Healthline provides information on its...
  
  
• Nextbio
  Nextbio
  NextBio is a privately owned software company that provides a platform for drug companies and life science researchers to search, discover, and share knowledge across public and proprietary data...
  
   (Life Science Search Engine)
• PubGene
  PubGene
  PubGene AS is located in Oslo, Norway and is the daughter company of PubGene Inc.In 2001, PubGene founders demonstrated one of the firstapplications of text mining to research in biomedicine...
  
  
• Quertle
  Quertle
  Quertle is a semantic search engine for life and chemical science literature and information. It covers a wide variety of information sources.-How Quertle Works:...
  
   (Semantic search of the biomedical literature)
• Searchmedica
  Searchmedica
  SearchMedica is a series of free medical search engines built by doctors for doctors and other medical professionals, with localized versions for the United Kingdom, the United States, France and Spain.- Description :...
  
  
• VADLO
  VADLO
  VADLO is a life sciences search engine, privately owned by Life in Research, LLC., based in Illinois, USA. VADLO caters to life sciences and biomedical researchers, educators, students, clinicians and reference librarians...
  
   (Life Sciences Search Engine)
• WebMD
  WebMD
  WebMD is an American corporation which provides health information services. It was founded in 1996 by Jim Clark and Pavan Nigam as Healthscape, later Healtheon, and then acquired WebMD in 1999 to form Healtheon/WebMD...
  
  

News

• Bing News
• Google News
  Google News
  Google News is a free news aggregator provided by Google Inc, selecting recent items from thousands of publications by an automatic aggregation algorithm....
  
  
• Daylife
  Daylife
  Daylife offers on-demand features and media apps served from the cloud. It provides digital media management tools and content feeds to publishers, brand marketers, and developers. Daylife was founded in 2006 and has raised $15M investment to date, most recently from strategic investor Getty Images...
  
  
• MagPortal
  MagPortal
  MagPortal.com is a search engine and directory for finding online articles. It was launched on March 28, 2000 by Hot Neuron LLC. The site primarily indexes articles from magazine websites, but it also includes some daily publications. Users can browse articles by topic, use the full-text search...
  
  
• Newslookup
  Newslookup
  Newslookup.com is a news search engine, news headline and news feed provider established in 2000, by Michael Kynast. The search engine crawls several thousand prominent news media sites providing results that are neither weighted in favor of any news organization or censored in any...
  
  
• Nexis (Lexis Nexis)
• Topix.net
  Topix.net
  Topix.net is a discussion board website. Topix LLC, the controlling company, has its headquarters in Palo Alto, California.Topix began as a news aggregator which categorizes news stories by topic and geography. It was created by Bryn Dole, Rich Skrenta, Bob Truel, Tom Markson, Mike Markson, and...
  
  
• Yahoo! News
  Yahoo! News
  Yahoo! News is an Internet-based news aggregator provided by Yahoo!. It features Top Stories, U.S. National, World, Business, Entertainment, Science, Health, Weather, Most Popular, News Photos, Op/Ed, and Local news....
  
  

People

• Comfibook
  Comfibook
  Comfibook is a search aggregator website that collects and publishes data from many online and offline sources . The aggregated data is presented in snippets, with links to sources when available...
  
  
• Ex.plode.us
  Ex.plode.us
  ex.plode.us was a website search engine that indexed people. It was created by , the creators of the Elgg social networking platform. Ex.plode.us aggregated social data from 43 Things, flickr, jaiku, Live Journal, tribe.net, twitter, and YouTube....
  
  
• InfoSpace
  InfoSpace
  Infospace provides metasearch and private-label Internet search services for consumers and businesses.InfoSpace's flagship metasearch site is Dogpile; its other consumer brands are WebCrawler, Nation, DoGreatGood and MetaCrawler.-History:...
  
  
• PeekYou
  PeekYou
  PeekYou is a people search engine that indexes people and their links on the web. The name "PeekYou" is explained as a contraction of People and Seek. Founded in April 2006 by Michael Hussey , PeekYou claims to have indexed over 250 million people, mostly in the US and Canada...
  
  
• Spock
  Spock (website)
  Spock is a vertical search engine or entity search engine on people. The name "Spock" is explained with a backronym: "single point of contact keyword." Founded in 2006 by Jay Bhatti and Jaideep Singh, it has "indexed over 250 million people representing over 1.5 billion data records." These...
  
  
• Spokeo
  Spokeo
  Spokeo is a social network aggregator website that aggregates data from many online and offline sources...
  
  
• Wink
  Wink Technologies
  Wink Technologies is the operator of Wink, a community-based social search engine. It provides people search across social networks, and Web search based on user input...
  
  
• Zabasearch.com
  Zabasearch.com
  Zabasearch.com is a website that searches for and collates disparate information regarding United States residents, including names, current and past addresses, phone numbers, and birth years, and then permits the user to query other search engines with this information to retrieve other data such...
  
  
• ZoomInfo
  ZoomInfo
  ZoomInfo is a vertical search engine focused on people, companies, and the relationships among them.-Overview:Zoom Information Inc. was founded by Jonathan Stern in 2000 as Eliyon Technologies. The company’s investors include Venrock Associates and Vulcan Capital.The site powers people searches for...
  
  

Real estate / property

• Fizber.com
• HotPads.com
  HotPads.com
  HotPads.com is an map-based rental housing and real estate search engine. Launched in November 2005, the site allows users to search for housing using a graphical map. Listings are displayed at their addresses, allowing users to conduct a location-based search. Through the graphical interface,...
  
  
• Redfin
  Redfin
  Redfin is an online real estate brokerage, currently available in the Atlanta, Austin, Boston, Chicago, Dallas, Denver, Las Vegas, Los Angeles, Orange County, Phoenix, Portland, Sacramento, San Diego, San Francisco Bay, Seattle, and Washington, D.C areas. Redfin combines a real estate search site...
  
  
• Rightmove
  Rightmove
  Rightmove plc is a British-based company that runs www.rightmove.co.uk, an online real estate portal. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.- The company :...
  
  
• Zillow.com
  Zillow.com
  Zillow is an online real estate database that was founded in 2005 by Rich Barton and Lloyd Frink, former Microsoft executives and founders of Microsoft spin-off Expedia. The website uses a proprietary algorithm called the "Zestimate" to appraise property values based on undisclosed factors...
  
  

Blog

• Amatomu
  Amatomu
  Amatomu is a blog search engine and article aggregator, focusing on blogs published in South Africa. It was founded by local web entrepreneurs Matthew Buckland and Vincent Maher in March 2007, while working for one of the country's largest news websites the Mail & Guardian Online.According to an...
  
  
• Bloglines
  Bloglines
  Bloglines is a web-based news aggregator for reading syndicated feeds using the RSS and Atom formats. Mark Fletcher, former CEO of ONElist, founded the site in June 2003 and sold it in February 2005 to Ask.com/InterActiveCorp. In 2005, it hosted more than 200 million searchable blog articles. On...
  
  
• BlogPulse
  BlogPulse
  BlogPulse is a search engine and analytic system for blogs. It uses automated processes to monitor the daily activity on blogs and generates trend information. It was initially created by IntelliSeek, and was later acquired by the Nielsen Company, and currently owned by NM Incite, A Nielsen /...
  
  
• BlogScope
  BlogScope
  BlogScope is a search engine for the blogosphere with advanced analysis and visualization technology.BlogScope is outcome of an ongoing research project at the University of Toronto...
  
  
• IceRocket
  IceRocket
  IceRocket is an Internet search engine which specializes in real-time search. Based in Dallas, Texas, it launched in 2004 hoping to market itself solely through word of mouth....
  
  
• Technorati
  Technorati
  Technorati is an Internet search engine for searching blogs. By June 2008, Technorati was indexing 112.8 million blogs and over 250 million pieces of tagged social media...
  
  
• Regator
  Regator
  Regator.com is a curated blog directory and search engine. Founded in 2007 by Scott Lockhart, Chris Turner, and Kimberly Turner and going live with Regator.com in August 2008, Regator LLC also produces Regator Breaking News and the Regator iPhone App for iOS. The API platform also allows for...
  
  

Multimedia

• Bing Videos
• blinkx
  Blinkx
  Blinkx is an Internet search engine for video and audio content, headquartered in San Francisco, California and the UK that allows searching and classification of audio files, video clips and streaming media such as Internet television and video on demand...
  
  
• FindSounds
  FindSounds
  FindSounds is a website run by the Comparisonics Corporation. It searches an index of over 1,000,000 sounds on the internet, with 100,000 users and 1,000,000 searches each month. The index mainly consists of sound effects and musical instrument samples...
  
  
• Google Video
  Google Video
  Google Videos is a video search engine, and formerly a free video sharing website, from Google Inc. Before removing user-uploaded content, the service allowed selected videos to be remotely embedded on other websites and provided the necessary HTML code alongside the media, similar to YouTube...
  
  
• Munax
  Munax
  Munax is a Swedish company which develops large hyper-parallel execution search engine systems. Founded in March 2007, its headquarters are in Stockholm. The company produces Munax XE, an all-content search engine that allows users to preview audio and video files with the option to transcode...
  
  's PlayAudioVideo
• Picsearch
  Picsearch
  Picsearch is a Swedish company which develops and provides image search services for large websites. The image search services developed and provided by Picsearch power several major Internet companies, such as Lycos. Other Picsearch customers include regional search portals in Germany, Turkey and...
  
  
• Pixsta
  Pixsta
  Pixta Ltd. is a UK-based image and video search company founded in 2006 by Alexander Straub, Dr. Daniel Heesch and David Williams.- Background :...
  
  
• Podscope
  Podscope
  Podscope was the first consumer search engine to create a 'spoken word index' for podcasts. Originally launched in April 2005, it creates an index against every spoken word within the audio/video content. Users can search for a term or phrase and then go right to the portion of the podcast that...
  
  
• ScienceStage
  ScienceStage
  ScienceStage is a global, science-oriented multimedia portal that specializes in online video streaming, which is used to support communication between scientists, scholars, researchers in industry, and professionals. It is also used by academics and students as a virtual educational tool...
  
  
• Songza
  Songza
  Songza is a web radio that streams music for free. Songza is different from other web radio services for two reasons: the stations on Songza are made by people and Songza helps people find stations by personalizing the Songza experience based on a user's interests and by displaying an activity feed...
  
  
• SeeqPod
  SeeqPod
  SeeqPod was a search and recommendation engine specifically for indexing and finding playable search results including audio, video, podcasts and Wikipedia articles that are publicly accessible on the World Wide Web. The site claimed to have indexed more than 13 million individual tracks and...
  
  
• TV Genius
  TV Genius
  TV Genius is a United Kingdom-based software company that specializes in TV search engines, TV recommendation engines, and EPG development. TV solutions are provided across TV, mobile, web, set top boxes and devices like Playstation and Nintendo Wii. The company works with television operators in...
  
  
• Veveo
  Veveo
  VTap is a video search engine launched on 10 September 2007 and designed for broadband-enabled phones and developed by venture capitalist firm Veveo; a funded startup headquartered in Andover, Massachusetts...
  
  
• TinEye
  TinEye
  TinEye is a reverse image search engine developed and offered by Idée, Inc., a company based in Toronto, Canada, which was founded by Leila Boujnane and Paul Bloore in 1999. The use of the Web application is free of charge for customers. According to the company, TinEye is the first web-based image...
  
  
• Yahoo! Video
  Yahoo! Video
  Yahoo! Video is a video sharing website on which users could upload and share videos. The service is owned and created by Yahoo!. Yahoo! Video began as an internet-wide video search engine and added the ability to upload and share video clips in June 2006...
  
  
• YouTube
  YouTube
  YouTube is a video-sharing website, created by three former PayPal employees in February 2005, on which users can upload, view and share videos....
  
  

BitTorrent

These search engines work across the BitTorrent protocol.

• Btjunkie
  BTJunkie
  BTJunkie is an advanced BitTorrent search engine. It uses a web crawler to search for torrent files from other torrent sites and store it in its database. It has nearly 4,000,000 active torrents and about 4,200 torrents added daily , making it the largest torrent site indexer on the web...
  
  
• FlixFlux
  FlixFlux
  FlixFlux is a specialist torrent search site for films. The site was originally launched in mid 2006 with a basic search facility, and a list of new film releases. The site was relaunched in December 2006 with a complete redesign, and many new features....
  
  
• Isohunt
  IsoHunt
  isoHunt is a BitTorrent index with over 1.7 million torrents in its database and 20 million peers from indexed torrents. With 7.4 million unique visitors , isoHunt is one of the most popular BitTorrent search engines. Thousands of torrents are added to and deleted from it every day. Users of...
  
  
• Mininova
  Mininova
  Mininova is a website offering BitTorrent downloads. Mininova was once one of the largest sites offering torrents of copyrighted material, but in November 2009, following legal action in the Dutch courts, the site operators deleted all torrent files uploaded by regular users including torrents that...
  
  
• The Pirate Bay
  The Pirate Bay
  The Pirate Bay is a Swedish website which hosts magnet links and .torrent files, which allow users to share electronic files, including multimedia, computer games and software via BitTorrent...
  
  
• TorrentSpy
  TorrentSpy
  TorrentSpy was a popular BitTorrent indexing website. It provided .torrent files, which enabled users to exchange data between one another.It also provided a forum to comment on them and integrated the user-driven content site ShoutWire into the front page...
  
  
• Torrentz
  Torrentz
  Torrentz is a Finland-based meta-search engine for BitTorrent that is run by an individual known as Flippy. It indexes torrents from various major torrent sites such as Mininova, BTJunkie, and The Pirate Bay, and offers compilations of various trackers per torrent that are not necessarily present...
  
  

Maps

• Bing Maps
• Géoportail
  Géoportail
  Géoportail is a web mapping service of the French government whose aim is to publicise geographical data about the whole French territory. This service, developed by two public agencies , was officially inaugurated on June 23, 2006 by president Jacques Chirac...
  
  
• Google Maps
  Google Maps
  Google Maps is a web mapping service application and technology provided by Google, free , that powers many map-based services, including the Google Maps website, Google Ride Finder, Google Transit, and maps embedded on third-party websites via the Google Maps API...
  
  
• MapQuest
  MapQuest
  MapQuest is an American free online web mapping service owned by AOL. The company was founded in 1967 as Cartographic Services, a division of R.R. Donnelley & Sons in Chicago, Illinois, United States. It moved to Lancaster, Pennsylvania in 1969. When it became an independent company in 1994, it was...
  
  
• OpenStreetMap
  OpenStreetMap
  OpenStreetMap is a collaborative project to create a free editable map of the world. Two major driving forces behind the establishment and growth of OSM have been restrictions on use or availability of map information across much of the world and the advent of inexpensive portable GPS devices.The...
  
  
• WikiMapia
  Wikimapia
  WikiMapia is a privately owned, online map and satellite imaging resource that combines Google Maps with a wiki system, allowing users to add information, in the form of a note, to any location on Earth. Users may currently use this information for free...
  
  
• Yahoo! Maps
  Yahoo! Maps
  Yahoo! Maps is a free online mapping portal provided by Yahoo!.-News:*On May 16, 2007, Yahoo! released a new map style designed by the cartography company...
  
  

Price

• Bing Shopping
  Bing Shopping
  Bing Shopping is a products search service and part of Microsoft's Bing search engine. It is customised for finding products available for sale on the web. The results provide information such as product pictures, pricing, and description...
  
  
• BestPrice
  BestPrice
  BestPrice.gr is a price comparison service developed and owned by Phaistos Networks S.A.It has partnered with more than 770 merchants in Greece and provides free information on millions of products in 100+ different categories....
  
  
• Google Product Search (formerly Froogle)
• Kelkoo
  Kelkoo
  The website Kelkoo is a European price comparison service founded in France in 1999, allowing customers to find information on products they want to purchase, including price and seller information. It was bought by Yahoo! in 2004...
  
  
• MySimon
  MySimon
  mySimon is a comparison shopping website owned by CBS Interactive. The site offers shopping recommendations, buying advice, and side by side price comparisons for various products. The site directs users to other shopping sites such as Amazon.com when searching for products. It is not affiliated...
  
  
• PriceGrabber
  PriceGrabber
  PriceGrabber.com is a price comparison service. They've partnered with more than 13,000 merchants, retailers, and sellers and provide free information on millions of products in 25 different categories...
  
  
• PriceRunner
  PriceRunner
  The website PriceRunner is a price comparison service launched in Sweden in 1999, and since bought by ValueClick. It allows users to compare prices on a range of products...
  
  
• PriceSCAN
  PriceSCAN
  PriceSCAN.com is a US-based price comparison website, founded in 1997 by David Cost and Jeffrey Trester, two alumni of the Wharton School. A privately held company based in Malvern, Pennsylvania, PriceSCAN was one of the first generation of "shopping bots" which included Dealtime, mySimon and...
  
  
• Pronto.com
  Pronto.com
  Pronto.com is a price comparison service and a division of Barry Diller's company, IAC/InterActiveCorp. Pronto was originally founded by IAC in 2005 as a downloadable software application that silently monitors all of a user's activity on a product page, then shows deals from other merchants on the...
  
  
• Shopping.com
  Shopping.com
  Shopping.com is a price comparison service owned by eBay and operates websites in USA, United Kingdom, France, Germany and Australia. Shopping.com started out with the name DealTime.com which still operates as a related, but otherwise separate website....
  
  
• ShopWiki
  ShopWiki
  ShopWiki is an Internet shopping search engine founded in 2005 and launched in early 2006. It was founded by the former DoubleClick CEO Kevin P. Ryan, the former CTO and DoubleClick co-founder Dwight Merriman and Eliot Horowitz. Their primary distinguisher is crawling the internet for stores...
  
  
• Shopzilla
  Shopzilla
  Shopzilla is a price comparison service. Founded in June 1996 by Farhad Mohit and Henri Asseily as Binary Compass Enterprises, the company changed its name to BizRate.com in January 1999...
  
   (also operates Bizrate)
• SwoopThat.com
  SwoopThat.com
  SwoopThat.com is an online textbook price comparison service. Based in San Diego, California, it specializes in college textbooks but includes high school textbooks as well. The company's books by course search engine lets students input their class schedules, see all the required textbooks for...
  
  
• TheFind.com
  TheFind.com
  TheFind.com is a discovery shopping search engine targeting lifestyle products such as apparel, accessories, home and garden, fitness, kids and family, and health and beauty. - History:...
  
  
• Wishabi
  Wishabi
  Wishabi is a Canadian online shopping platform that is owned and maintained by the Wishabi corporation. Wishabi's mission is "to give Canadians the best tools to make informed shopping decisions"....
  
  

Human answers

• Answers.com
  Answers.com
  Answers.com is an Internet-based knowledge exchange, which includes WikiAnswers, ReferenceAnswers, VideoAnswers, and five international language Q&A communities. The Answers.com domain name was purchased by Bill Gross and Henrik Jones at idealab in 1996. The domain name was acquired by NetShepard...
  
  
• DeeperWeb
  DeeperWeb
  DeeperWeb is a free search engine tool for Google users that allows navigating through search results by employing tag cloud techniques. Additional technologies such as Topic-Mapping methods are implemented to assist users in identifying relevant results upon a specific topic.The tool allows...
  
  
• eHow
  EHow
  eHow is an online how-to guide with more than 1 million articles and 170,000 videos offering step-by-step instructions. eHow articles and videos are created by freelancers and cover a wide variety of topics organized into a hierarchy of categories. Any eHow user can leave comments or responses, but...
  
  

• Quora
  Quora
  Quora is a question-and-answer website created, edited and organized by its community of users. The site was founded in June 2009, launched in private beta in December 2009, and made available to the public on June 21, 2010....
  
  
• Stack Overflow
  Stack Overflow (website)
  Stack Overflow is a website, part of the Stack Exchange Network, featuring questions and answers on a wide range of topics in computer programming....
  
  /Stack Exchange Network
  Stack Exchange Network
  The Stack Exchange Network is a network of websites featuring questions and answers on a wide range of topics in different fields, owned and operated by Stack Exchange, Inc....
  
  
• Uclue
  Uclue
  Uclue is a fee-based research service staffed by former Google Answers Researchers . Uclue launched on February 28, 2007. As of May 2007, 37 former Google Answers Researchers have signed on to answer questions at Uclue. Researchers are located in North America, South America, Europe, Australia,...
  
  
• Yahoo! Answers
  Yahoo! Answers
  Yahoo! Answers is a community-driven question-and-answer site or a knowledge market launched by Yahoo! on June 28, 2005 that allows users to both submit questions to be answered and answer questions asked by other users...
  
  
• wikiHow
  WikiHow
  wikiHow is a web-based and wiki-based community, consisting of an extensive database of how-to guides. wikiHow's mission is to build the world's largest and highest quality how-to manual. The site started as an extension of the already existing eHow website, and has evolved to host over 127,000...
  
  

Automatic answers

• AskMeNow
  AskMeNow
  AskMeNow Inc. was an American public corporation, specializing in mobile search and mobile advertising. The Irvine, California based company officially launched in November 2005 and ceased operations in late 2008...
  
  
• BrainBoost
  Brainboost
  Brainboost is a metasearch engine designed to provide specific answers to questions asked in natural language. Currently it only supports English. The Brainboost engine uses machine learning and natural language processing AI techniques to answer the questions.Traditional engines return the links...
  
  
• True Knowledge
  True Knowledge
  True Knowledge Ltd. company in Cambridge, England, founded by William Tunstall-Pedoe, which specialises in knowledge base and semantic search engine software. Its first product was an answer engine that aimed to directly answer questions posed in plain English text, which is accomplished using a...
  
  
• Wolfram Alpha
  Wolfram Alpha
  Wolfram Alpha is an answer-engine developed by Wolfram Research. It is an online service that answers factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer as a search engine might...
  
  

Natural language

• Ask.com
  Ask.com
  Ask is a Q&A focused search engine founded in 1996 by Garrett Gruener and David Warthen in Berkeley, California. The original software was implemented by Gary Chevsky from his own design. Warthen, Chevsky, Justin Grant, and others built the early AskJeeves.com website around that core engine...
  
  
• Bing
  Bing
  Bing is a web search engine from Microsoft.Bing may also refer to:* An onomatopœia of a bell sound* Bing cherry, a variety of cherry* Bing , Chinese flatbread* Bing , a German company that manufactured toys and kitchen utensils...
  
   (Semantic ability is powered by Powerset)
• BrainBoost
  Brainboost
  Brainboost is a metasearch engine designed to provide specific answers to questions asked in natural language. Currently it only supports English. The Brainboost engine uses machine learning and natural language processing AI techniques to answer the questions.Traditional engines return the links...
  
  
• hakia
  Hakia
  hakia is an Internet search engine. The company has invented QDEXing technology, an alternative new infrastructure to indexing that uses SemanticRank algorithm, a solution mix from the disciplines of ontological semantics, fuzzy logic, computational linguistics, and mathematics...
  
  
• Lexxe
  Lexxe
  Lexxe is an internet search engine that applies Natural Language Processingin its semantic search technology.  Founded in 2005 by Dr. Hong Liang Qiao,Lexxe is based in Sydney, Australia....
  
  
• Powerset
  Powerset (company)
  Powerset is a Microsoft owned company based in San Francisco, California that, in 2006, was developing a natural language search engine for the Internet....
  
  

Open source search engines

• DataparkSearch
  DataparkSearch
  DataparkSearch is a search engine designed to organize search within a website, group of websites, intranet or local system.DataparkSearch is written in C. Distributed under the terms of the GNU General Public License, DataparkSearch is free software....
  
  
• Egothor
  Egothor
  Egothor is an open source search engine implementation written entirely in Java to ensure cross platform compatibility.It is aimed at any application involving full text search, and the project lies particular emphasis on its cross platform compatibility...
  
  
• Grub
  Grub (search engine)
  Grub is an open source distributed search crawler platform.Users of Grub can download the peer-to-peer grubclient software and let it run during computer idle time. The client indexes the URLs and send them back to the main grub server in a highly compressed form...
  
  
• Ht://dig
  Ht-//dig
  ht://Dig is a free software indexing and searching system created in 1995 by Andrew Scherpbier while he was employed at San Diego State University. It can provide a search engine for a single website....
  
  
• Isearch
  Isearch
  Isearch is open-source text retrieval software first developed in 1994 as part of the Isite Z39.50 information framework. The project started at the Clearinghouse for Networked Information Discovery and Retrieval of the North Carolina supercomputing center MCNC and funded by the National Science...
  
  
• Lucene
  Lucene
  Apache Lucene is a free/open source information retrieval software library, originally created in Java by Doug Cutting. It is supported by the Apache Software Foundation and is released under the Apache Software License....
  
  
• Lemur Toolkit & Indri Search Engine
• mnoGoSearch
  MnoGoSearch
  mnoGoSearch is an open source search engine for Unix-like computer systems written in C. It is distributed under the GNU General Public License and designed to organize search within a website, group of websites, intranet or local system....
  
  
• Namazu
  Namazu (search engine)
  Namazu is a free full-text search engine software under GPL licence, originally developed by Satoru Takabayashi. It can work as a scale Web search engine, and also as a desktop search for email or other files. It is written in Perl.-See also:...
  
  
• Nutch
  Nutch
  Nutch is an effort to build an open source web search engine based on Lucene Java for the search and index component.- Features :Nutch is coded entirely in the Java programming language, but data is written in language-independent formats...
  
  
• OpenFTS
  OpenFTS
  OpenFTS is a free software database search engine based on PostgreSQL. It is distributed under the GNU General Public License. From the OpenFTS Website:-External links:* *...
  
  
• Recoll
  Recoll
  Recoll is a desktop search tool that provides efficient full text search in a friendly GUI, with minimum technical sophistication and few mandatory external dependencies. It runs under many Unix-like operating systems, and is mostly independent of the desktop environment.Recoll was designed not to...
  
  
• Sciencenet
  Sciencenet
  Sciencenet is a distributed search engine at KIT – Liebel-Lab for scientific knowledge.The Sciencenet software is based on p2p technology developed by Michael Christen in collaboration with Liebel-lab at KIT.- Background :...
  
   (for scientific knowledge, based on YaCy
  YaCy
  YaCy is a free distributed search engine, built on principles of peer-to-peer networks. Its core is a computer program written in Java distributed on several hundred computers, , so-called YaCy-peers...
  
   technology)
• Seeks
  Seeks
  Seeks is an open source project licensed under the AGPLv3. Seeks goal is to create an alternative search engine to the current commercially available market leading search engines that is driven by user concerns rather than corporate interests. The original manifesto was created by Emmanuel...
  
  
• Sphinx
  Sphinx (search engine)
  Sphinx is a free software search engine designed with indexing database content in mind. It currently supports MySQL, PostgreSQL, and ODBC-compliant databases as data sources natively. Other data sources can be indexed via pipe in a custom XML format...
  
  
• SWISH-E
  SWISH-E
  SWISH-E stands for Simple Web Indexing System for Humans - Enhanced. It is used to index collections of documents ranging up to one million documents in size and includes import filters for many document types.- See also :...
  
  
• Terrier Search Engine
  Terrier Search Engine
  Terrier is software that tackles the problem of information access and in particular information retrieval. It aims to tackle the rapid development of Web, intranet and desktop search engines...
  
  
• Wikia Search
  Wikia Search
  Wikia Search was a short-lived free and open-source Web search engine launched by Wikia, a for-profit wiki-hosting company founded in late 2004 by Jimmy Wales and Angela Beesley....
  
  
• Xapian
  Xapian
  Xapian is an open source probabilistic information retrieval library, released under the GNU General Public License . It is a full text search engine library for programmers....
  
  
• YaCy
  YaCy
  YaCy is a free distributed search engine, built on principles of peer-to-peer networks. Its core is a computer program written in Java distributed on several hundred computers, , so-called YaCy-peers...
  
  
• Zettair
  Zettair
  Zettair is a compact text search engine for indexing and search of HTML collections. It is an open source software developed by a group of researchers at RMIT University....
  
  

Social search engines

• ChaCha Search
• Delver
• Eurekster
  Eurekster
  Eurekster is a company founded in Christchurch, New Zealand, with an office located in San Francisco, California, that builds social search engines for use on websites, the search engines are called swickis ....
  
  
• Mahalo.com
  Mahalo.com
  Mahalo.com is a web directory and Internet-based knowledge exchange launched in alpha test in May 2007 by Jason Calacanis...
  
  
• OneRiot
• Rollyo
  Rollyo
  Rollyo is a Yahoo!-powered search engine which allows users to register accounts and create search engines that only retrieve results from the websites and blogs they want to include in their search results....
  
  
• SearchTeam
  SearchTeam
  SearchTeam.com is a collaborative search and curation engine. SearchTeam allows collaborators to search together as a team for web pages, videos, pictures, reference materials, books and articles, and scholarly articles. SearchTeam was launched in July 2011 by Zakta.-Features:In SearchTeam,...
  
  
• Sproose
  Sproose
  Sproose is a consumer search engine launched in August 2007 by founder Bob Pack. Sproose provides web search results from partners including MSN, Yahoo! and Ask.com...
  
  
• Trexy
  Trexy
  Trexy is an Internet metasearch engine established in early 2006. It allows users to record and share "search trails" of their activity on search engines. The trails themselves are searchable, allowing users to save time when searching by examining the pages found by other users...
  
  
• Wikia search
  Wikia Search
  Wikia Search was a short-lived free and open-source Web search engine launched by Wikia, a for-profit wiki-hosting company founded in late 2004 by Jimmy Wales and Angela Beesley....
  
  
• Wink
  Wink Technologies
  Wink Technologies is the operator of Wink, a community-based social search engine. It provides people search across social networks, and Web search based on user input...
  
   provides web search by analyzing user contributions such as bookmarks and feedback

Visual search engines

• ChunkIt!
  ChunkIt!
  yolink is a powerful search technology developed by TigerLogic that mines links and documents to retrieve keyword-rich blocks of information.-Description:...
  
  
• Grokker
• Pixsta
  Pixsta
  Pixta Ltd. is a UK-based image and video search company founded in 2006 by Alexander Straub, Dr. Daniel Heesch and David Williams.- Background :...
  
  
• PubGene
  PubGene
  PubGene AS is located in Oslo, Norway and is the daughter company of PubGene Inc.In 2001, PubGene founders demonstrated one of the firstapplications of text mining to research in biomedicine...
  
  
• TinEye
  TinEye
  TinEye is a reverse image search engine developed and offered by Idée, Inc., a company based in Toronto, Canada, which was founded by Leila Boujnane and Paul Bloore in 1999. The use of the Web application is free of charge for customers. According to the company, TinEye is the first web-based image...
  
  
• Viewzi
  Viewzi
  Viewzi was a search engine company based in Dallas, Texas that developed a highly visual experience that tailored the way users look at information based on what they are looking for. The search engine lightened the data overload by filtering and grouping results into several distinct interfaces...
  
  

Search appliances

• Google: Google Search Appliance

Desktop search engines

Name	Platform	Remarks	License
Autonomy	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	IDOL Enterprise Desktop Search.	Proprietary, commercial
Beagle Beagle (software) Beagle is a search system for Linux and other such modern Unix-like systems, enabling the user to search documents, chat logs, email and contact lists in a similar way to Spotlight in Mac OS X, and Windows Search or Google Desktop under Linux or Microsoft Windows...	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...	Open source desktop search tool for Linux based on Lucene	A mix of the X11/MIT License and the Apache License Apache License The Apache License is a copyfree free software license authored by the Apache Software Foundation . The Apache License requires preservation of the copyright notice and disclaimer....
Copernic Desktop Search Copernic Desktop Search Copernic Desktop Search is a commercial desktop search utility for the Microsoft Windows family of operating systems. Three versions of the product are made which target different market segments....	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Considered best overall search engine in 2005 UW benchmark study.	Free for home use
Docfetcher DocFetcher DocFetcher is an open source desktop search application that runs on Microsoft Windows and Linux. It is written in Java and has a Standard Widget Toolkit based graphical user interface....	Cross-platform	Open source desktop search tool for Windows and Linux, based on Apache Lucene	Eclipse Public License Eclipse Public License The Eclipse Public License is an open source software license used by the Eclipse Foundation for its software. It replaces the Common Public License and removes certain terms relating to litigations related to patents....
dtSearch Desktop	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...		Proprietary (30 day trial)
Easyfind Easyfind (software) Easyfind is a light, free search system for Mac OS X enabling the user to search files, folders, and contents.-Background:Easyfind operates as a replacement for Mac OS X Spotlight but does not require indexing...	Mac OS Mac OS Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface...		Freeware
Everything Everything (software) Everything is a free proprietary Windows desktop search engine that can rapidly find files and folders by name on an NTFS volume. On October 30, 2009, Everything was ranked #857 of the 1,757 applications used by the 70,000 users of Wakoopa, making it more widely used than the WinZip archive...	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Find files and folders by name instantly on NTFS volumes	Freeware
Google Desktop Google Desktop Google Desktop is desktop search software made by Google for Linux, Mac OS X, and Microsoft Windows. The program allows text searches of a user's e-mails, computer files, music, photos, chats, Web pages viewed, and other "Google Gadgets"....	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds... , Mac OS Mac OS Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface... , Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Integrates with the main Google search engine page. 5.9 Release now supports x64 systems. As of September 14, 2011, Google has discontinued this product.	Freeware
GNOME Storage GNOME Storage GNOME Storage was a project to replace the traditional file system with a new document store. Storage was part of a larger design for a new desktop environment that was still under development. The current implementation includes natural language access and network transparency.Storage is no longer...	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...	Open Source desktop search tool for Unix/Linux	GPL
imgSeek ImgSeek imgSeek is a photo collection manager and viewer with content-based search and many other features. The query is expressed either as a rough sketch painted by the user or as another image...	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds... , Mac OS Mac OS Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface... , Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Desktop content-based image search	GPL v2
InSight Desktop Search InSight Desktop Search InSight Desktop Search is a proprietary desktop search application that runs on Microsoft Windows. It is written in Visual Basic .NET and has a widget-like user interface while in standby mode....	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Metadata Metadata The term metadata is an ambiguous term which is used for two fundamentally different concepts . Although the expression "data about data" is often used, it does not apply to both in the same way. Structural metadata, the design and specification of data structures, cannot be about data, because at... -based search utility	Freeware
ISYS Search Software ISYS Search Software ISYS Search Software is a global leader in high performance enterprise search software and universal information access solutions. The company develops a suite of search, mobile access and information management infrastructure technologies....	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	ISYS:desktop search software.	Proprietary (14 day trial)
Locate32 Locate32 Locate32 is an open source file finder for Windows 98/ME/NT4/2000/XP/Vista/7. It works by indexing the files on the user's harddrives, thus making searches faster. Removable or remote drives can also be indexed....	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Graphical port of Unix Unix Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna... 's locate & updatedb	BSD License
Meta Tracker Tracker (desktop search software) Meta Tracker is a search system for Linux and other Unix-like systems. Meta Tracker is written in the C programming language.Nautilus has support for both Tracker and Beagle....	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds... , Unix Unix Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...	Open Source desktop search tool for Unix/Linux	GPL v2
Recoll Recoll Recoll is a desktop search tool that provides efficient full text search in a friendly GUI, with minimum technical sophistication and few mandatory external dependencies. It runs under many Unix-like operating systems, and is mostly independent of the desktop environment.Recoll was designed not to...	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds... , Unix Unix Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...	Open Source desktop search tool for Unix/Linux	GPL
Spotlight Spotlight (software) Spotlight is a system-wide desktop search feature of Apple's Mac OS X operating system. Spotlight is a selection-based search system, which creates a virtual index of all items and files on the system. It is designed to allow the user to quickly locate a wide variety of items on the computer,...	Mac OS Mac OS Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface...	Found in Apple Mac OS X Mac OS X Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...  "Tiger Mac OS X v10.4 Mac OS X v10.4 Tiger is the fifth major release of Mac OS X, Apple's desktop and server operating system for Macintosh computers. Tiger was released to the public on 29 April 2005 for US$129.95 as the successor to Mac OS X Panther , which had been released 18 months earlier... " and later OS X releases.	Proprietary
Strigi Strigi Strigi is a desktop search daemon, which is operating system-independent and desktop-independent. Strigi was initiated by Jos van den Oever. Strigi's goals are to be fast, use a small amount of RAM, and use flexible backends and plug-ins. A benchmark as of January 2007 showed that Strigi is faster...	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds... , Unix Unix Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna... , Solaris, Mac OS X Mac OS X Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...  and Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Cross-platform open source desktop search engine	LGPL v2
Terrier Search Engine Terrier Search Engine Terrier is software that tackles the problem of information access and in particular information retrieval. It aims to tackle the rapid development of Web, intranet and desktop search engines...	Linux Linux Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds... , Mac OS Mac OS Mac OS is a series of graphical user interface-based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The Macintosh user experience is credited with popularizing the graphical user interface... , Unix Unix Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...	Desktop search for Windows, Mac OS X (Tiger), Unix/Linux.	MPL Mozilla Public License The Mozilla Public License is a free and open source software license. Version 1.0 was developed by Mitchell Baker when she worked as a lawyer at Netscape Communications Corporation and version 1.1 at the Mozilla Foundation...
Tropes Zoom Tropes Zoom Tropes Zoom is a desktop search engine and semantic analysis software from Acetic/Semantic-Knowledge.Originally written by Pierre Molette in 1994 in partnership with University Paris 8, Tropes Zoom was the first search engine based on semantic networks to be widely known.Unlike other search...	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Semantic Search Engine.	Freeware and commercial
Windows Search Windows Search Windows Search is an indexed desktop search platform released by Microsoft for the Windows operating system....	Windows Microsoft Windows Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...	Part of Windows Vista Windows Vista Windows Vista is an operating system released in several variations developed by Microsoft for use on personal computers, including home and business desktops, laptops, tablet PCs, and media center PCs...  and later OSs. Available as Windows Desktop Search for Windows XP Windows XP Windows XP is an operating system produced by Microsoft for use on personal computers, including home and business desktops, laptops and media centers. First released to computer manufacturers on August 24, 2001, it is the second most popular version of Windows, based on installed user base...  and Server 2003 Windows Server 2003 Windows Server 2003 is a server operating system produced by Microsoft, introduced on 24 April 2003. An updated version, Windows Server 2003 R2, was released to manufacturing on 6 December 2005... . Does not support indexing UNC paths on x64 systems.	Proprietary, freeware

Google

• AOL Search
  AOL
  AOL Inc. is an American global Internet services and media company. AOL is headquartered at 770 Broadway in New York. Founded in 1983 as Control Video Corporation, it has franchised its services to companies in several nations around the world or set up international versions of its services...
  
  
• CompuServe Search
  CompuServe
  CompuServe was the first major commercial online service in the United States. It dominated the field during the 1980s and remained a major player through the mid-1990s, when it was sidelined by the rise of services such as AOL with monthly subscriptions rather than hourly rates...
  
  
• Groovle
  Groovle
  Groovle is a web search site which offers customers the ability to customise their home page. The underlying service is provided by Google but the company is owned and operated entirely independently....
  
  
• MySpace Search
  MySpace
  Myspace is a social networking service owned by Specific Media LLC and pop star Justin Timberlake. Myspace launched in August 2003 and is headquartered in Beverly Hills, California. In August 2011, Myspace had 33.1 million unique U.S. visitors....
  
  
• Netscape
  Netscape
  Netscape Communications is a US computer services company, best known for Netscape Navigator, its web browser. When it was an independent company, its headquarters were in Mountain View, California...
  
  
• Ripple
  Ripple (charitable organisation)
  Ripple is a non-profit click-to-donate internet site and search engine which passes 100% of its revenue to other charities. Launched on the May 4, 2007, they make their revenue by attaining sponsorship from advertisers in return for delivering users who will see their advertisements.The...
  
  

Yahoo!

• AltaVista
  AltaVista
  AltaVista is a web search engine owned by Yahoo!. AltaVista was once one of the most popular search engines but its popularity declined with the rise of Google...
  
  
• Ecocho
  Ecocho
  Ecocho is a search engine with the aim of offsetting carbon emissions by donating 70% of revenues to 'carbon offset credits'. The site launched on 14 April 2008.It is owned by the Found Agency, a search engine optimisation company....
  
  
• Everyclick (formerly based on Ask.com)
• Forestle
  Forestle
  Forestle is an ecologically inspired search engine created by Christian Kroll, Wittenberg, Germany, in 2008. Forestle is a website for finding all kinds of information on the internet; Forestle helps to save the rain forest and aims to reduce CO2 emissions...
  
   (an ecologically motivated site supporting sustainable rain forests - formerly based on Google)
• GoodSearch
  GoodSearch
  GoodSearch is a Yahoo-powered search engine that donates 50% of its revenue, about a penny per search, to listed American charities and schools designated by its users. The money donated comes from the site's advertisers...
  
  
• Rectifi
  Rectifi
  Rectifi is an online search engine which channels profits it earns to charity.Rectifi was set up by Jonny Platt as a successor to GiveAsYouGet. As well as a general search engine with sponsored adds, rectifi earns revenue through eBay, and a comparison shopping feature...
  
  

Bing

• A9.com
  A9.com
  A9.com is a subsidiary of Amazon.com based in Palo Alto, California that develops search engine technology. A9 currently has over 100 employees in its Palo Alto, Bangalore, and Dublin offices.A9 has worked in 3 areas over the years....
  
  
• Alexa Internet
  Alexa Internet
  Alexa Internet, Inc. is a California-based subsidiary company of Amazon.com that is known for its toolbar and Web site. Once installed, the toolbar collects data on browsing behavior which is transmitted to the Web site where it is stored and analyzed and is the basis for the company's Web traffic...
  
  
• Ciao!
  Ciao (website)
  Ciao is a European based online-shopping portal with websites in the United Kingdom, France, Spain, Germany, the Netherlands, Italy and Sweden. In February 2008, the company launched an American version of the site, Ciao.com. The site provides a forum where registered users can write reviews and...
  
  
• Facebook
  Facebook
  Facebook is a social networking service and website launched in February 2004, operated and privately owned by Facebook, Inc. , Facebook has more than 800 million active users. Users must register before using the site, after which they may create a personal profile, add other users as...
  
  
• Tafiti
  Tafiti
  Tafiti was an animated search engine launched by Microsoft Corp. and TrappsInteractive. Silverlight animation and video player. It was launched in 2007 and was discontinued in 2009.The name Tafiti comes from the Swahili word meaning to "do research"...
  
  
• Ms. Dewey
  Ms. Dewey
  Ms. Dewey was a viral marketing campaign started by Microsoft in October 2006. It also refers to the character of the same name, who is the campaign's main subject. The Ms. Dewey website was an Adobe Flash-based experimental interface for Live Search...
  
  
• Yahoo! Search
  Yahoo! Search
  Yahoo! Search is a web search engine, owned by Yahoo! Inc. and was , the 2nd largest search engine on the web by query volume, at 6.42%, after its competitor Google at 85.35% and before Baidu at 3.67%, according to Net Applications....
  
  

Acquired or defunct search engines

• AlltheWeb
  AlltheWeb
  AlltheWeb was an Internet search engine that made its debut in mid-1999. It grew out of FTP Search, Tor Egge's doctorate thesis at the Norwegian University of Science and Technology, which he started in 1994, which in turn resulted in the formation of Fast Search and Transfer, established on July...
  
  
• BRS/Search
  BRS/Search
  BRS/Search is a full-text database and information retrieval system. BRS/Search uses a fully inverted indexing system to store, locate, and retrieve unstructured data...
  
   (now OpenText Livelink ECM Discovery Server)
• Cuil
  Cuil
  Cuil was a search engine that organized web pages by content and displayed relatively long entries along with thumbnail pictures for many results. Cuil said it had a larger index than any other search engine, with about 120 billion web pages. It went live on July 28, 2008...
  
  
• Direct Hit Technologies
  Direct Hit Technologies
  Direct Hit Technologies, Inc. was a Boston-based search engine company that provided search engine services to major web portals and operated a public search engine at directhit.com...
  
   (acquired by Ask Jeeves in January, 2000)
• Google Answers
  Google Answers
  Google Answers was an online knowledge market offered by Google that allowed users to post bounties for well researched answers to their queries. Asker-accepted answers cost $2 to $200. Google retained 25% of the researcher's reward and a 50 cent fee per question. In addition to the researcher's...
  
  
• Infoseek
  Infoseek
  Infoseek was a popular search engine founded in 1994 by Steve Kirsch.Infoseek was originally operated by the Infoseek Corporation, headquartered in Sunnyvale, California. Infoseek was bought by The Walt Disney Company in 1998, and the technology was merged with that of the Disney-acquired Starwave...
  
  
• Inktomi
  Inktomi
  Inktomi Corporation was a California company that provided software for Internet service providers. It was founded in 1996 by UC Berkeley professor Eric Brewer and graduate student Paul Gauthier. The company was initially founded based on the real-world success of the search engine they developed...
  
  
• Kartoo
  Kartoo
  KartOO was a meta search engine which displayed a visual interface. It operated from 2001 to early 2010.-Interface:KartOO had a graphical Adobe Flash GUI, as opposed to a text-based list of results. Its color scheme was to a degree reminiscent of Apple Computer's Aqua interface. Search results were...
  
  
• Lotus Magellan
  Lotus Magellan
  Lotus Magellan was a groundbreaking DOS-based desktop search package, conceived and developed by Bill Gross and released in the 1980s by Lotus Development Corporation, most famous for Lotus 1-2-3....
  
  
• Overture.com (formerly GoTo.com, now Yahoo! Search Marketing
  Yahoo! Search Marketing
  Yahoo! Search Marketing is a keyword-based "Pay per click" or "Sponsored search" Internet advertising service provided by Yahoo!.Yahoo began offering this service after acquiring Overture Services, Inc....
  
  )
• PubSub
• RetrievalWare
  RetrievalWare
  RetrievalWare is an enterprise search engine emphasizing natural language processing and semantic networks which was commercially available from 1992 to 2007 and is especially known for its use by government intelligence agencies.- History :...
  
   (acquired by Fast Search & Transfer
  Fast Search & Transfer
  Fast Search & Transfer ASA is a Norwegian company based in Oslo. FAST focuses on data search technologies. It also has offices located in Germany, Italy, Sri Lanka, France, Japan, the United Kingdom, the United States, Brazil, Mexico and other countries around the world. The company was founded...
  
   and now owned by Microsoft
  Microsoft
  Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...
  
  )
• Singingfish
  Singingfish
  Singingfish was an audio/video search engine that powered audio video search for Windows Media Player,, WindowsMedia.com, RealOne/RealPlayer,, Real Guide, AOL Search, Dogpile, Metacrawler and Singingfish.com, among others. Launched in 2000, it was one of the earliest and longest lived search...
  
  
• Sphere
  Sphere (Website)
  Sphere was a blog search engine. The Sphere search engine delivered blog posts based on algorithms that combine semantic matching with authority factors to deliver results relevant to the search query.Sphere also organized bloggers by topic....
  
  
• Tafiti
  Tafiti
  Tafiti was an animated search engine launched by Microsoft Corp. and TrappsInteractive. Silverlight animation and video player. It was launched in 2007 and was discontinued in 2009.The name Tafiti comes from the Swahili word meaning to "do research"...
  
  
• Wikia Search
  Wikia Search
  Wikia Search was a short-lived free and open-source Web search engine launched by Wikia, a for-profit wiki-hosting company founded in late 2004 by Jimmy Wales and Angela Beesley....
  
  
• WiseNut
  WiseNut
  WiseNut was a crawler-based search engine owned by Looksmart. It debuted as a beta in July 2001 and was officially launched in September 2001. It used its own database, and when it started it was highly regarded by a number of critics. WiseNut introduced a fresh database and relevant hits...
  
  
• World Wide Web Worm

See also

• List of academic databases and search engines
• List of semantic search engines
• List of web directories
• Search aggregator
  Search aggregator
  A search aggregator is a type of metasearch engine which gathers results from multiple search engines simultaneously through RSS search results...
  
  
• Search engine optimization
  Search engine optimization
  Search engine optimization is the process of improving the visibility of a website or a web page in search engines via the "natural" or un-paid search results...
  
  

:Category:Search engine software

External links