List Of Search Engines
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Search engines, including
web search engine A search engine is a software system designed to carry out web searches. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a ...
s,
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 conta ...
engines, metasearch engines,
desktop search Desktop search tools search within a user's own computer files as opposed to searching the Internet. These tools are designed to find information on the user's PC, including web browser history, e-mail archives, text documents, sound files, images ...
tools, and
web portal A web portal is a specially designed website that brings information from diverse sources, like emails, online forums and search engines, together in a uniform way. Usually, each information source gets its dedicated area on the page for displayin ...
s and
vertical market A vertical market is a market in which vendors offer goods and services ''specific'' to an industry, trade, profession, or other group of customers with specialized needs. A horizontal market is a market in which a product or service meets a ...
websites have a search facility for
online database An online database is a database accessible from a local network or the Internet, as opposed to one that is stored locally on an individual computer or its attached storage (such as a CD). Online databases are hosted on websites, made available as s ...
s.


By content/topic


General

† Main website is a portal


Geographically localized


Accountancy

*
IFACnet {{Short description, Worldwide accountancy search engine IFACnet, the KnowledgeNet for Professional Accountants, was the global, multilingual search engine developed by the International Federation of Accountants (IFAC) and its members to provide p ...


Business

* Business.com *
GenieKnows GenieKnows Inc. was a privately owned vertical search engine company based in Halifax, Nova Scotia. It was started by Rami Hamodah who also started SwiftlyLabs.com and Salesboom.com. Like many internet search engines, its revenue model centers o ...
(United States and
Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
) *
GlobalSpec GlobalSpec 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. ...
* Nexis (Lexis Nexis) *
Thomasnet The ''Thomas Register of American Manufacturers'', now ThomasNet, is an online platform for supplier discovery and product sourcing in the US and Canada. It was once known as the "big green books" and "Thomas Registry", and was a multi-volume ...
(
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
)


Computers

*
Shodan (website) Shodan is a search engine that lets users search for various types of servers (webcams, routers, servers, etc.) connected to the internet using a variety of filters. Some have also described it as a search engine of service banners, which ...


Content

*
Openverse Openverse is an open-source search engine for open content developed as part of the WordPress project. It searches Creative Commons licensed and public domain content from dozens of different sources. The software is licensed under the MIT Lice ...
, search engine for open content.


Dark web

* Ahmia * Grams *
TorSearch Tor, short for The Onion Router, is free and open-source software for enabling Anonymity, anonymous communication. It directs Internet traffic through a free, worldwide, volunteer overlay network, consisting of more than seven thousand relay ...


Education

General: *
Chegg Chegg, Inc., is an American education technology company based in Santa Clara, California. It provides homework help, digital and physical textbook rentals, textbooks, online tutoring, and other student services. The company was launched in 200 ...
* SkilledUp Academic materials only: *
BASE (search engine) BASE (Bielefeld Academic Search Engine) is a multi-disciplinary search engine to scholarly internet resources, created by Bielefeld University Library in Bielefeld, Germany. It is based on free and open-source software such as Apache Solr and VuF ...
* ChemRefer *
CiteULike CiteULike was a web service which allowed users to save and share citations to academic papers. Based on the principle of social bookmarking, the site worked to promote and to develop the sharing of scientific references amongst researchers. In ...
*
Google Scholar Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes p ...
*
Library of Congress The Library of Congress (LOC) is the research library that officially serves the United States Congress and is the ''de facto'' national library of the United States. It is the oldest federal cultural institution in the country. The library is ...
* Semantic Scholar


Enterprise

*
Apache Solr Solr (pronounced "solar") is an open-source enterprise-search platform, written in Java. Its major features include full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, database integration, NoSQL features a ...
*
Jumper 2.0 ApexKB (formerly Jumper), is a discontinued free and open-source 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 ...
: Universal search powered by
Enterprise bookmarking Enterprise bookmarking is a method for Web 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. This is done collectively and collaboratively i ...
*
Oracle Corporation Oracle Corporation is an American multinational computer technology corporation headquartered in Austin, Texas. In 2020, Oracle was the third-largest software company in the world by revenue and market capitalization. The company sells da ...
: Secure Enterprise Search 10g * Q-Sensei: Q-Sensei Enterprise *
Swiftype Swiftype is a search and index company based in San Francisco, California, that provides search software for organizations, websites, and computer programs. Notable customers include AT&T, Dr. Pepper, Hubspot and TechCrunch. History Swiftype was ...
: Swiftype Search * TeraText: TeraText Suite


Events

*
Tickex Tickex.com was a United States and UK based search engine dedicated to live event tickets; concerts, sports, and theatre. The business did not sell tickets directly to consumers, instead the search engine aggregated and displayed tickets from ...
(US, UK) *
TickX TickX is a SAAS company based in Manchester, England, which aims to help companies sell more tickets directly through their own websites. It was founded in 2015 as an events and tickets search engine, comparing events in the UK, Ireland, Spain an ...
(UK, Ireland, Spain, Netherlands)


Food and recipes

*
RecipeBridge RecipeBridge is a vertical search engine for recipes, founded by Milwaukee based entrepreneurs Andy Theimer and Bill Brennan. It was established in December 2007 and a beta version was launched in 2008 which makes it the oldest dedicated recipe ...
:
vertical search A vertical search engine is distinct from a general web search engine, in that it focuses on a specific segment of online content. They are also called specialty or topical search engines. The vertical content area may be based on topicality, media ...
engine for
recipe A recipe is a set of instructions that describes how to prepare or make something, especially a dish of prepared food. A sub-recipe or subrecipe is a recipe for an ingredient that will be called for in the instructions for the main recipe. His ...
s * Yummly: semantic recipe search


Genealogy

*
Mocavo.com Findmypast is a UK-based online genealogy service owned, since 2007, by British company DC Thomson. The website hosts billions of searchable records of census, directory and historical record information. It originated in 1965 when a group of ge ...
: family history search engine


Job

* Adzuna (UK) *
CareerBuilder CareerBuilder is an employment website founded in 1995 with offices in the United States, Canada, Europe, and Asia. In 2008, it had the largest market share among online employment websites in the United States, where it was founded. CareerBu ...
(USA) *
Craigslist Craigslist (stylized as craigslist) is an American classified advertisements website with sections devoted to jobs, housing, for sale, items wanted, services, community service, gigs, résumés, and discussion forums. Craig Newmark began the ...
(by city) *
Dice.com Dice.com is a career website based in New York City with primary sales and development operations in Urbandale, Iowa and Denver. It serves information technology and engineering professionals, as well as contract and permanent engineering sta ...
(USA) *
Glassdoor Glassdoor is an American website where current and former employees anonymously review companies. Headquartered in San Francisco, California, it has additional offices in Chicago, Dublin, London, and São Paulo. Glassdoor also allows its users to ...
(USA) *
Indeed Indeed is an American worldwide employment website for job listings launched in November 2004. It is an independent subsidiary of multinational holding Recruit (company), Recruit Co. Ltd. It is co-headquartered in Austin, Texas, and Stamford, Co ...
(USA) *
JobStreet.com JobStreet.com Pte Ltd is a Malaysian company. It was founded in 1997, it is now Southeast Asia's largest online employment company, according to Forbes. The company through its employment website of the same name, currently serves about 80,000 corp ...
(
Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...
, Japan, India) * Monster.com (USA), (India) *
Naukri.com Naukri.com is an Indian employment website operating in India and Middle East. It was founded in March 1997 by Indian businessman Sanjeev Bikhchandani. Naukri.com is the largest employment website in India. History and milestones Naukri.com ...
(India) * Rozee.pk (Pakistan) *
Yahoo! HotJobs Yahoo HotJobs, formerly known as hotjobs.com, was an online job search engine An employment website is a website that deals specifically with employment or careers. Many employment websites are designed to allow employers to post job requiremen ...
(Countrywise subdomains, International)


Legal

*
Google Scholar Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes p ...
* Lexis (Lexis Nexis) *
Quicklaw LexisNexis Quicklaw is a Canadians, Canadian electronic legal research Bibliographic database, database that catalogues court decisions from all levels, news reports, provincial and federal statutes, journals, and other legal commentary. It also o ...
*
WestLaw Westlaw is an online legal research service and proprietary database for lawyers and legal professionals available in over 60 countries. Information resources on Westlaw include more than 40,000 databases of case law, state and federal statute ...


Medical

* Bing Health *
Bioinformatic Harvester The Bioinformatic Harvester was a bioinformatic meta search engine created by the European Molecular Biology Laboratory and subsequently hosted and further developed by KIT Karlsruhe Institute of Technology for genes and protein-associated inform ...
*
CiteAb CiteAb Limited is a life science data company located in Bath, England that offers an antibody, biochemicals, experimental models, kits and protein search tool to aid biomedical scientists in their research. History and operations CiteAb st ...
(antibody search engine for medical researchers) *
EB-eye The EB-eye, also known as EBI Search, is a search engine that provides uniform access to the biological data resources hosted at the European Bioinformatics Institute (EBI). The EB-eye – the EBI search engine for biological data The European ...
EMBL-EBI's Search engine *
Entrez The Entrez (pronounced ''ɒnˈtreɪ'') Global Query Cross-Database Search System is a federated search engine, or web portal that allows users to search many discrete health sciences databases at the National Center for Biotechnology Information ...
(includes
PubMed PubMed is a free search engine accessing primarily the MEDLINE database of references and abstracts on life sciences and biomedical topics. The United States National Library of Medicine (NLM) at the National Institutes of Health maintain the ...
) *
GenieKnows GenieKnows Inc. was a privately owned vertical search engine company based in Halifax, Nova Scotia. It was started by Rami Hamodah who also started SwiftlyLabs.com and Salesboom.com. Like many internet search engines, its revenue model centers o ...
*
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 s ...
*
Healthline Healthline Media, Inc. is an American website and provider of health information headquartered in San Francisco, California. It was founded in 1999, relaunched in 2006, and established as a standalone entity in January 2016. Accuracy There ar ...
* Nextbio (Life Science Search Engine) *
PubGene PubGene AS is a bioinformatics company located in Oslo, Norway and is the daughter company of PubGene Inc. In 2001, PubGene founders demonstrated one of the first applications of text mining to research in biomedicine (i.e., biomedical text mini ...
* Searchmedica *
WebMD WebMD is an American corporation known primarily as an online publisher of news and information pertaining to human health and well-being. The site includes information pertaining to drugs. It is one of the top healthcare websites. It was fou ...


Mobile/handheld

* Taganode Local Search Engine (now defunct) *
Taptu Taptu was a social media and technology company that built platforms, tools and applications that enabled content on touch screen mobile devices, including phones running iOS and Android. Taptu was a privately held company that was founded in C ...
: taptu mobile/social search (now defunct)


News

* Bing News *
Google News Google News is a news aggregator service developed by Google. It presents a continuous flow of links to articles organized from thousands of publishers and magazines. Google News is available as an app on Android, iOS, and the Web. Google rel ...
* Newslookup *
Nexis LexisNexis is a part of the RELX corporation that sells data analytics products and various databases that are accessed through online portals, including portals for computer-assisted legal research (CALR), newspaper search, and consumer informa ...
(Lexis Nexis) *
Yahoo! News Yahoo! News is a news website that originated as an internet-based news aggregator by Yahoo!. The site was created by a Yahoo! software engineer named Brad Clawsie in August 1996. Articles originally came from news services such as the Associate ...


People

* FindFace *
PeekYou PeekYou is a people search engine that indexes people and their links on the web. Founded in April 2006 by Michael Hussey, PeekYou claims that they have indexed over 250 million people, mostly in the United States and Canada. The search results ...
*
Spokeo Spokeo is a people search website that aggregates data from online and offline sources. History Spokeo was founded in 2006 by four graduates from Stanford University—Mike Daly, Harrison Tang, Ray Chen, and Eric Liang. The original idea of aggr ...
* Zabasearch.com *
ZoomInfo ZoomInfo Technologies Inc. is a software and data company which provides information and data for companies and business individuals. History In 2007, DiscoverOrg was founded by Henry Schuck and Kirk Brown. In February 2019, it acquired its comp ...


Real estate/property

* HotPads.com * Realtor.com *
Redfin Redfin Corporation, based in Seattle, operates a residential real estate brokerage in 95 markets in the United States and Canada and in other markets via partner/referral agents. Its business model includes charging home sellers below-average f ...
*
Rightmove Rightmove plc is a UK-based company which runs rightmove.co.uk, the UK's largest online real estate property portal. Rightmove is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index. History Rightmove was incorpor ...
* StuRents.com *
Trulia Trulia is an American online real estate marketplace which is a subsidiary of Zillow. It facilitates buyers and renters to find homes and neighborhoods across the United States through recommendations, local insights, and map overlays that offer ...
*
Zillow Zillow Group, Inc., or simply Zillow, is an American tech real-estate marketplace company that was founded in 2006, and was created by Rich Barton and Lloyd Frink, former Microsoft executives and founders of Microsoft spin-off Expedia; Spencer ...
*
Zoopla ZPG Ltd. is a British real estate company based in London, England, owned by Silver Lake Partners. Its brands include the property website Zoopla, price comparison service Uswitch, finance comparison website Money.co.uk, personal finance conte ...


Television

*
TV Genius TV Genius is a United Kingdom-based software company that specialize in TV search engines, TV recommendation engines, and EPG development. It was acquired by Red Bee Media in August 2011, and by Ericsson in July 2013. TV Genius became an inte ...


Video games

*
Wazap Wazap! is a vertical search engine, video game database and social networking site to distribute gaming news, rankings, cheats, downloads and reviews owned and operated by East Beam Co. Ltd. of Japan. As a vertical search engine, it indexes gamin ...


By data type

Search engines dedicated to a specific kind of information


Maps

* Bing Maps *
Géoportail Géoportail is a comprehensive web mapping service of the French government that publishes maps and geophysical aerial photographs from more than 90 sources for France and its territories. The service, first developed by two public agencies (the ...
*
Google Maps Google Maps is a web mapping platform and consumer application offered by Google. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets ( Street View), real-time traffic conditions, and rou ...
*
MapQuest MapQuest (stylized as mapquest) is an American free online web mapping service. It was launched in 1996 as the first commercial web mapping service. MapQuest vies for market share with competitors such as Google Maps and Here. History MapQuest's ...
*
Nokia Maps Nokia Corporation (natively Nokia Oyj, referred to as Nokia) is a Finnish multinational telecommunications, information technology, and consumer electronics corporation, established in 1865. Nokia's main headquarters are in Espoo, Finland, i ...
*
OpenStreetMap OpenStreetMap (OSM) is a free, open geographic database updated and maintained by a community of volunteers via open collaboration. Contributors collect data from surveys, trace from aerial imagery and also import from other freely licensed g ...
*
Petal Maps Petal Maps is a map service based on TomTom provided by Huawei to devices with the operating system HarmonyOS, Android and iOS. It offers satellite imagery, aerial photography, 3D view surroundings, turn-by-turn navigation, head-up display and r ...
*
Tencent Maps Tencent Maps is a desktop and web mapping service application and technology provided by Tencent, offering satellite imagery, street maps, street view and historical view perspectives, as well as functions such as a route planner for traveling ...
*
Wikiloc Wikiloc is a premium website, launched in 2006,About Wikiloc
(Wikiloc) containing
WikiMapia Wikimapia is a geographic online encyclopedia project. The project implements an interactive "clickable" web map that utilizes Google Maps with a geographically-referenced wiki system, with the aim to mark and describe all geographical objects ...
*
Yahoo! Maps Yahoo! Maps was a free online mapping portal provided by Yahoo! Functionality included local weather powered by The Weather Channel, printing maps, and local reviews powered by Yelp. It shut down on June 30, 2015. For a time in 2019, Yahoo! Maps ...
*
Yandex Maps Yandex Maps ( rus, Яндекс Карты, r=Yandeks Karty) is a Russian web mapping service developed by Yandex. The service provides detailed maps of the whole world, it provides directions and estimated times of arrival for driving, walking, ...


Multimedia

*
Bing Videos Bing Videos (previously MSN Video and Live Search Video) is a video search service and part of Microsoft's Bing search engine. The service enables users to search and view videos across various websites. Bing Videos was officially released on Sept ...
*
blinkx RhythmOne , previously known as Blinkx, and also known as RhythmOne Group, is an American digital advertising technology company that owns and operates the web properties AllMusic, AllMovie, and SideReel. Blinkx was founded in 2004, went publ ...
*
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 sam ...
*
Google Video Google Video was a free video hosting service launched by the multinational technology company Google on January 25, 2005. Similar to YouTube, this platform allowed video clips to be hosted on Google servers and embedded on to other website ...
* Munax's PlayAudioVideo *
Openverse Openverse is an open-source search engine for open content developed as part of the WordPress project. It searches Creative Commons licensed and public domain content from dozens of different sources. The software is licensed under the MIT Lice ...
, search engine for open content. *
Picsearch Picsearch was a Swedish company which developed and provided image search services for large websites. The image search services developed by Picsearch power several major Internet companies, such as Lycos. Other Picsearch customers include re ...
* Pixsta *
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 ...
*
SeeqPod SeeqPod was a search and recommendation engine specifically for indexing and finding playable search results including audio, video, podcasts and Wikipedia articles that were publicly accessible on the World Wide Web. The site claimed to have ind ...
*
Songza Songza was a free music streaming and recommendation service for Internet users in the United States and Canada. Stating that its playlists are made by music experts, the service would recommend its users on various playlists based on time of ...
*
Tencent Video Tencent Video (, also called WeTV outside of China) is a Chinese video streaming website owned by Tencent. The website was launched in April 2011, and is one of China's largest online video platforms. As of March 2022, Tencent Video has over 1.2 ...
* TinEye *
TV Genius TV Genius is a United Kingdom-based software company that specialize in TV search engines, TV recommendation engines, and EPG development. It was acquired by Red Bee Media in August 2011, and by Ericsson in July 2013. TV Genius became an inte ...
*
Veveo Veveo is a software company based in Andover, Massachusetts. Founded in 2004, Veveo has worked with other firms Comcast, Cablevision, Rogers, AT&T, DirecTV, and Nokia. The venture-backed company is based near Boston, Massachusetts, and has an ...
*
Yahoo! Video The company Yahoo! ran several similar video services. Yahoo! Video, a video hosting service, was established in 2006. Later, the ability to upload videos was removed, changing it to a more pure video on demand service; the website became a port ...


Price

* Bing Shopping *
Google Shopping Google Shopping, formerly Google Product Search, Google Products and Froogle, is a Google service created by Craig Nevill-Manning which allows users to search for products on online shopping websites and compare prices between different vendor ...
(formerly Google Product Search and Froogle) *
Kelkoo Kelkoo is a European price comparison service founded in France in 1999. In 2000 Kelkoo merged with Zoomit, Dondecomprar and Shopgenie. The company was bought by Yahoo! on 26 March, 2004. and was subsequently sold by Yahoo to Jamplant, a Briti ...
*
MySimon Simon & Schuster () is an American publishing company and a subsidiary of Paramount Global. It was founded in New York City on January 2, 1924 by Richard L. Simon and M. Lincoln Schuster. As of 2016, Simon & Schuster was the third largest pub ...
*
PriceGrabber PriceGrabber.com is a price-comparison shopping site and distributed content commerce service founded in 1999 by former CEOs Kamran Pourzanjani and Tamim Mourad. The company partners with merchants, retailers, and sellers to provide information o ...
*
PriceRunner The website PriceRunner is a price comparison service launched in Sweden in 1999. It allows users to compare prices on a range of products. The company is headquartered in Stockholm, Sweden, and also operates within Denmark; and the UK. In March ...
* Pronto.com * Shopping.com *
Shopzilla Connexity (formally Connexity Inc.) is a privately held Los Angeles operator of shopping web sites, including Shopzilla.com. Originally started as comparison shopping website Bizrate.com, the company changed its name to Shopzilla in 2004, and c ...
*
TickX TickX is a SAAS company based in Manchester, England, which aims to help companies sell more tickets directly through their own websites. It was founded in 2015 as an events and tickets search engine, comparing events in the UK, Ireland, Spain an ...


Source code

* codeseek.com *
Google Code Search Google Code Search was a free beta product from Google which debuted in Google Labs on October 5, 2006, allowing web users to search for open-source code on the Internet. Features included the ability to search using operators, namely , , , a ...
*
Koders Koders was a search engine for open source code. It enabled software developers to easily search and browse source code in thousands of projects posted at hundreds of open source repositories. On April 28, 2008, it was announced that Black Du ...
*
Krugle Krugle delivers continuously updated, federated access to all of the code and technical information in the enterprise. Krugle search helps an organization pinpoint critical code patterns and application issues - immediately and at massive scale. K ...


BitTorrent

These search engines work across the BitTorrent protocol. * BTDigg * Isohunt *
Mininova Mininova was 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 ...
*
The Pirate Bay The Pirate Bay (sometimes abbreviated as TPB) is an online index of digital content of entertainment media and software. Founded in 2003 by Swedish think tank Piratbyrån, The Pirate Bay allows visitors to search, download, and contribute ma ...
*
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 th ...
*
Torrentz Torrentz was a Finland-based metasearch engine for BitTorrent, run by an individual known as Flippy, and founded on 24 July 2003. It indexed torrents from various major torrent websites, and offered compilations of various trackers per torrent ...


Blog

* Amatomu * Bloglines *
IceRocket IceRocket was an Internet search engine which specialized in real-time search. Based in Dallas, Texas, it launched in 2004 hoping to market itself solely through word of mouth. IceRocket was backed by Mark Cuban and headquartered in Dallas, Texas ...
* Munax * Regator *
Technorati Technorati was a search engine and a publisher advertising platform that served as an advertising solution for the thousands of websites in its network. Technorati launched its ad network in 2008, and at one time was one of the largest ad network ...


Email

* TEK


Forum

* Omgili


Question and answer


Human answers

*
Answers.com Answers.com, formerly known as WikiAnswers, is an Internet-based knowledge exchange. The Answers.com domain name was purchased by entrepreneurs Bill Gross and Henrik Jones at idealab in 1996. The domain name was acquired by NetShepard and sub ...
*
eHow eHow is an online how-to guide with many 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 use ...
*
Quora Quora () is a social question-and-answer website based in Mountain View, California. It was founded on June 25, 2009, and made available to the public on June 21, 2010. Users can collaborate by editing questions and commenting on answers that ...
*
Stack Overflow In software, a stack overflow occurs if the call stack pointer exceeds the stack bound. The call stack may consist of a limited amount of address space, often determined at the start of the program. The size of the call stack depends on many fac ...
/ Stack Exchange Network * Uclue *
wikiHow wikiHow is an online wiki-style publication featuring how-to articles on a variety of topics. Founded in 2005 by Internet entrepreneur Jack Herrick, its aim is to create an extensive database of instructional content, using the wiki model of ope ...
*
Yahoo! Answers Yahoo! Answers was a community-driven question-and-answer (Q&A) website or knowledge market owned by Yahoo! where users would ask questions and answer those submitted by others, and upvote them to increase their visibility. Questions were org ...


Automatic answers

*
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. AskMeNow's primary offering was ...
*
Wolfram Alpha WolframAlpha ( ) is an answer engine developed by Wolfram Research. It answers factual queries by computing answers from externally sourced data. WolframAlpha was released on May 18, 2009 and is based on Wolfram's earlier product Wolfram Mat ...


By model


Search appliances

* Fabasoft *
Google Search Appliance The Google Search Appliance (GSA) was a rack-mounted computer device that provided document indexing functionality. The GSA operating system was based on CentOS. The software was produced by Google and the hardware was manufactured by Dell. ...
- discontinued * Munax *
Searchdaimon Searchdaimon ES (Enterprise Search) is an open source enterprise search engine for full text search of structured and unstructured data available under the GPL v2 license. Its major features include hit highlighting, faceted search, dynamic clus ...
* Thunderstone


Desktop search engines

Desktop search Desktop search tools search within a user's own computer files as opposed to searching the Internet. These tools are designed to find information on the user's PC, including web browser history, e-mail archives, text documents, sound files, images ...
engines listed on a light purple background are no longer in active development.


Child-safe search engines

* Kiddle *
KidRex KidRex.org is a visual child-safe search engine powered by Google Programmable Search Engine. The website utilizes Google SafeSearch and maintains its own database of inappropriate websites and keywords. Additionally, social media websites are blo ...
*
KidzSearch KidzSearch.com is an American visual child-safe search engine and web portal powered by Google Programmable Search Engine with academic autocomplete that emphasizes safety for children. It uses Google's SafeSearch technology with additional sear ...


Metasearch engines


Natural language

*
Ask.com Ask.com (originally known as Ask Jeeves) is a question answering–focused e-business founded in 1996 by Garrett Gruener and David Warthen in Berkeley, California. The original software was implemented by Gary Chevsky, from his own design. Wa ...
*
Bing Bing most often refers to: * Bing Crosby (1903–1977), American singer * Microsoft Bing, a web search engine Bing may also refer to: Food and drink * Bing (bread), a Chinese flatbread * Bing (soft drink), a UK brand * Bing cherry, a varie ...
(Semantic ability is powered by Powerset) *
Lexxe Lexxe is an internet search engine that applies Natural Language Processing in its semantic search Semantic search denotes search with meaning, as distinguished from lexical search where the search engine looks for literal matches of the query w ...


Open-source search engines

* ht://Dig *
Isearch Isearch is open-source text retrieval software first developed in 1994 by Nassib Nassar as part of the Isite Z39.50 information framework. The project started at the Clearinghouse for Networked Information Discovery and Retrieval (CNIDR) of t ...
* Lemur Toolkit & Indri Search Engine *
Lucene Apache Lucene is a free and open-source search engine software library, originally written in Java by Doug Cutting. It is supported by the Apache Software Foundation and is released under the Apache Software License. Lucene is widely used as ...
*
mnoGoSearch mnoGoSearch is an open-source web search engine for Microsoft Windows and Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1 ...
*
Nutch Apache Nutch is a highly extensible and scalable open source web crawler software project. Features Nutch is coded entirely in the Java programming language, but data is written in language-independent formats. It has a highly modular archite ...
*
Openverse Openverse is an open-source search engine for open content developed as part of the WordPress project. It searches Creative Commons licensed and public domain content from dozens of different sources. The software is licensed under the MIT Lice ...
*
Recoll Recoll is a desktop search tool that provides full text search (from single-word to arbitrarily complex boolean searches) in a GUI with few mandatory external dependencies. It runs under many Unix-like Operating system, operating systems, and is ...
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Searchdaimon Searchdaimon ES (Enterprise Search) is an open source enterprise search engine for full text search of structured and unstructured data available under the GPL v2 license. Its major features include hit highlighting, faceted search, dynamic clus ...
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Searx Searx (; stylized as searX) is a free and open-source metasearch engine, available under the GNU Affero General Public License version 3, with the aim of protecting the privacy of its users. To this end, Searx does not share users' IP addresses ...
* Seeks *
Sphinx A sphinx ( , grc, σφίγξ , Boeotian: , plural sphinxes or sphinges) is a mythical creature with the head of a human, the body of a lion, and the wings of a falcon. In Greek tradition, the sphinx has the head of a woman, the haunches of ...
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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. SWISH-E is based on SWISH, dev ...
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Terrier Search Engine The Terrier IR Platform is a modular open source software for the rapid development of large-scale information retrieval applications. Terrier was developed by members of thInformation Retrieval Research Group Department of Computing Science, at ...
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Xapian Xapian is a free and open-source probabilistic information retrieval library, released under the GNU General Public License (GPL). It is a full-text search engine library for programmers. It is written in C++, with bindings to allow use from ...
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YaCy ''YaCy'' (pronounced “ya see”) is a free distributed search engine, built on the principles of peer-to-peer (P2P) networks created by Michael Christen in 2003. The engine is written in Java and distributed on several hundred computers, , so- ...
* Zettair


Web search engine

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Gigablast Gigablast is an American free and open-source web search engine and web directory, directory. Founded in 2000, it is an independent engine and web crawler, developed and maintained by Matt Wells, a former Infoseek employee and New Mexico Instit ...
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Grub Grub can refer to Grub (larva), of the beetle superfamily Scarabaeoidea, or as a slang term for food. It can also refer to: Places * Grub, Appenzell Ausserrhoden, Switzerland * Grub, St. Gallen, Switzerland * Grub (Amerang), a hamlet in Bavaria, ...
* Wiby


Enterprise search

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Apache Solr Solr (pronounced "solar") is an open-source enterprise-search platform, written in Java. Its major features include full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, database integration, NoSQL features a ...
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Elasticsearch Elasticsearch is a search engine based on the Lucene library. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. Elasticsearch is developed in Java and is dual ...


P2P search engines


Privacy search engines

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DuckDuckGo DuckDuckGo (DDG) is an internet search engine that emphasizes protecting searchers' privacy and avoiding the filter bubble of personalized search results. DuckDuckGo does not show search results from content farms. It uses various APIs o ...
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HotBot HotBot was an American web search engine owned by Lycos. It was launched in May 1996 by ''Wired'' magazine. During the 1990s, it was one of the most popular search engines on the World Wide Web. History HotBot was launched in May 1996 by HotWir ...
* MetaGer *
Mojeek Mojeek ( ) is a search engine based in the United Kingdom. The search results provided by Mojeek come from its own index of web pages, created by crawling the web. History In 2004, the Mojeek search engine started out as a personal project by ...
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Qwant Qwant () is a French search engine, launched in February 2013 and operated from Paris. It is one of the few EU-based search engines. It claims that it does not employ user tracking or personalize search results in order to avoid trapping user ...
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Searx Searx (; stylized as searX) is a free and open-source metasearch engine, available under the GNU Affero General Public License version 3, with the aim of protecting the privacy of its users. To this end, Searx does not share users' IP addresses ...
* Swisscows *
You.com You.com is an Artificial intelligence, AI Assistant that began as a personalized search, personalization-focused search engine. While still offering web search capabilities, You.com has evolved to prioritize a chat-first AI Assistant. The compa ...


Social and environmental focus

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Ecosia Ecosia is a search engine based in Berlin, Germany. Ecosia considers itself a social business, claiming to be CO2-negative, supports full financial transparency and protects the privacy of its users. Ecosia is B Lab-certified, meeting its ...


Semantic browsing engines


Social search engines

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ChaCha Search ChaCha was an American human search engine, human-guided search engine that provided free, real-time answers to any question, through its website, or by using one of the company's mobile apps. The company, founded in 2006 by Scott A. Jones and ...
* Delver *
Eurekster Eurekster was a New Zealand-based company that built social search engines for use on websites, which were referred to as "swickis" (for "search plus wiki"
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Facebook Facebook is an online social media and social networking service owned by American company Meta Platforms. Founded in 2004 by Mark Zuckerberg with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin M ...
Search *
Mahalo.com Mahalo.com was a web directory (or human search engine) and Internet-based knowledge exchange (Question-and-answer website) launched in May 2007 by Jason Calacanis. It differentiated itself from algorithmic search engines like Google and Ask.com, ...
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Rollyo Rollyo was a Yahoo!-powered search engine which allowed users to register accounts and create personalized search engines. Each search engine could include up to 25 websites/blogs chosen by the user. Search results were limited to the sites incl ...
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Sproose Sproose was a consumer search engine launched in August 2007 by founder Bob Pack. Sproose provided web search results from partners including MSN, Yahoo! and Ask.com. Sproose intended to have better-quality results than algorithmic search engine ...
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Trexy Trexy was an London-based Internet metasearch engine established in early 2006. The website was founded by Nigel Hamilton and Megan Hamilton. It allowed users to record and share "search trails" of their activity on search engines. The trails thems ...


Usenet

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Google Groups Google Groups is a service from Google that provides discussion groups for people sharing common interests. The Groups service also provides a gateway to Usenet newsgroups via a shared user interface. Google Groups became operational in February ...
(formerly
Deja News Google Groups is a service from Google that provides discussion groups for people sharing common interests. The Groups service also provides a gateway to Usenet newsgroups via a shared user interface. Google Groups became operational in February ...
)


Visual search engines

* FindFace *
Grokker Groxis was a tech company based in San Francisco, California that developed and marketed the web-based federated content access and visual search engine called Grokker. History Groxis was founded by Jean-Michel Decombe, Paul Hawken, and R.J. Pi ...
* Macroglossa * Pixsta * TinEye *
Viewzi Viewzi was a search engine company based in Dallas, Texas Dallas () is the third largest city in Texas and the largest city in the Dallas–Fort Worth metroplex, the fourth-largest metropolitan area in the United States at 7.5 million p ...


By popularity


Defunct or acquired search engines

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AlltheWeb AlltheWeb (sometimes referred to as FAST or FAST Search) was an Internet search engine that made its debut in mid-1999 and was closed in 2011. It grew out of ''FTP Search'', Tor Egge's doctorate thesis at the Norwegian University of Science and Te ...
(acquired by
Yahoo! Yahoo! (, styled yahoo''!'' in its logo) is an American web services provider. It is headquartered in Sunnyvale, California and operated by the namesake company Yahoo Inc., which is 90% owned by investment funds managed by Apollo Global Man ...
) *
AltaVista AltaVista was a Web search engine established in 1995. It became one of the most-used early search engines, but lost ground to Google and was purchased by Yahoo! in 2003, which retained the brand, but based all AltaVista searches on its own sear ...
(acquired by
Yahoo! Yahoo! (, styled yahoo''!'' in its logo) is an American web services provider. It is headquartered in Sunnyvale, California and operated by the namesake company Yahoo Inc., which is 90% owned by investment funds managed by Apollo Global Man ...
in 2003, shut down in 2013) * Bixee.com (India) (acquired by
Ibibo Ibibo Group is an online Indian travel organisation founded in January 2007 by Ashish Kashyap. The company is a subsidiary of MakeMyTrip (MMT) Limited, which owns a 100% stake in Ibibo Group. Group owns the B2C online travel aggregator Goib ...
) *
Blekko Blekko, trademarked as blekko (lowercase), was a company that provided a web search engine with the stated goal of providing better search results than those offered by Google Search, with results gathered from a set of 3 billion trusted webpa ...
(acquired by IBM in 2015 for its use for Watson-based products) *
BlogScope BlogScope was a search engine for the blogosphere with advanced analysis and visualization technology, founded in 2005. as an outcome of a research project at the University of Toronto. As of Apr 2009, the system indexed over 725 million blog pos ...
(acquired by
Marketwire GlobeNewswire provides press release distribution services globally, with substantial operations in North America and Europe. GlobeNewswire was a Nasdaq, Inc. subsidiary from September 2006 until April 2018 when West Corporation (now Intrado) ...
) *
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. It was the search engine that in 1977 powered Bibliographic Retrieval Services ...
(now
OpenText OpenText Corporation (also written ''opentext'') is a Canadian company that develops and sells enterprise information management (EIM) software. OpenText, headquartered in Waterloo, Ontario, Canada, is Canada's fourth-largest software company ...
Livelink ECM Discovery Server) *
Btjunkie BTJunkie was a BitTorrent web search engine operating between 2005 and 2012. It used a web crawler to search for torrent files from other torrent sites and store them on its database. It had nearly 4,000,000 active torrents and about 4,200 torre ...
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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.L ...
(patents acquired by
Google Google LLC () is an American multinational technology company focusing on search engine technology, online advertising, cloud computing, computer software, quantum computing, e-commerce, artificial intelligence, and consumer electronics. ...
after shutdown) *
DeepPeep DeepPeep was a search engine that aimed to crawl and index every database on the public Web. Unlike traditional search engines, which crawl existing webpages and their hyperlinks, DeepPeep aimed to allow access to the so-called Deep web, World ...
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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. Founded in April 1998 by Gary Culliss and Mike Cassidy (serial e ...
(acquired by
Ask Jeeves Ask.com (originally known as Ask Jeeves) is a question answering–focused e-business founded in 1996 by Garrett Gruener and David Warthen in Berkeley, California. The original software was implemented by Gary Chevsky, from his own design. Wart ...
in January, 2000) * FedWorld Information Network (, a web and
telnet Telnet is an application protocol used on the Internet or local area network to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. User data is interspersed in-band with Telnet control i ...
search engine and
FTP The File Transfer Protocol (FTP) is a standard communication protocol used for the transfer of computer files from a server to a client on a computer network. FTP is built on a client–server model architecture using separate control and data ...
site specialized to searching for and within
United States federal government The federal government of the United States (U.S. federal government or U.S. government) is the Federation#Federal governments, national government of the United States, a federal republic located primarily in North America, composed of 50 ...
documents, established in 1992 by the
National Technical Information Service The National Technical Information Service (NTIS) is an agency within the U.S. Department of Commerce. The primary mission of NTIS is to collect and organize scientific, technical, engineering, and business information generated by U.S. Gove ...
() and shut down in 2013) * Getit Infoservices Private Limited *
Google Answers Google Answers was an online knowledge market offered by Google, online from 2002 to 2006. History Google Answers' predecessor was Google Questions and Answers, which was launched in June 2001. This service involved Google staffers answering ...
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GoPubMed GoPubMed was a knowledge-based search engine for biomedical texts. The Gene Ontology (GO) and Medical Subject Headings (MeSH) served as "Table of contents" in order to structure the millions of articles in the MEDLINE database. MeshPubMed was at on ...
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hakia hakia was an Internet search engine. Launched in March 2004 and based in New York City, hakia attempted to pioneer a semantic search engine in contrast to keyword search engines that were established at that time. The search engine ceased oper ...
* IBM STAIRS *
Infoseek Infoseek (also known as the "big yellow") was an American internet 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 Wa ...
(acquired by
Disney The Walt Disney Company, commonly known as Disney (), is an American multinational mass media and entertainment conglomerate headquartered at the Walt Disney Studios complex in Burbank, California. Disney was originally founded on October ...
) *
Inktomi Inktomi Corporation was a company that provided software for Internet service providers (ISPs). It was incorporated in Delaware and headquartered in Foster City, California, United States. Customers included Microsoft, HotBot, Amazon.com, eBay, ...
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Ixquick Startpage is a Dutch search engine company that highlights privacy as its distinguishing feature.ExpressVPN.com"Free Search Engines: What You're Looking For?" 19 January 2015, retrieved 5 April 2016. The website advertises that it allows users ...
(merged into
Startpage A home page (or homepage) is the main web page of a website. The term may also refer to the start page shown in a web browser when the application software, application first opens. Usually, the home page is located at the root of the website's ...
) *
Jubii Jubii is a webportal based in Copenhagen. Jubii provides a search engine and other services, including e-mail. Jubii was originally created in the summer 1995 by Jakob Faarvang later incorporated by the Cybernet founders Kasper Larsen, Henrik Sor ...
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Kartoo KartOO was a meta search engine which displayed a visual interface. It operated from 2001 to early 2010. Interface KartOO had an Adobe Flash GUI, as opposed to a text-based list of results. Its color scheme was to a degree reminiscent of Apple ...
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LeapFish LeapFish.com was a search aggregator that retrieved results from other portals and search engines, including Google, Bing and Yahoo!, and also search engines of blogs, videos etc. It was a registered trademark of Dotnext Inc, launched on 3 Novem ...
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Lotus Magellan Lotus Magellan is an MS-DOS desktop search package, conceived and developed by Bill T. Gross, Bill Gross and released in 1989 by Lotus Development Corporation, most famous for Lotus 1-2-3. Lotus sold 500,000 copies of Magellan. MetaLib MetaLib is a federated search system developed by Ex Libris Group. MetaLib conducts simultaneous searches in multiple, and often heterogeneous, information resources such as library catalogs, journal articles, newspapers and selected quality Interne ...
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mozDex mozDex was a project to build an Internet-scale search engine with free and open source software (FOSS) technologies like Nutch. Since its search algorithms and code were open, it was hoped that no search results could be manipulated by either mo ...
* Munax * Myriad Search * Overture.com (formerly GoTo.com, now
Yahoo! Search Marketing Yahoo! Native (formerly known as Yahoo! Advertising, Yahoo! Search Marketing and Yahoo! Gemini) is a native "Pay per click" Internet advertising service provided by Yahoo. Yahoo began offering this service after acquiring Overture Services, Inc. ...
) * PicoSearch efunct July 2014... * PubSub *
RetrievalWare RetrievalWare is an enterprise search, 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 ...
(acquired by
Fast Search & Transfer Microsoft Development Center Norway (known as Fast Search & Transfer ASA (FAST) before 2010) is a Norwegian company, founded in 1997 and based in Oslo. FAST focused on data search technologies. It had offices located in Germany, Italy, Sri Lanka ...
and now owned by
Microsoft Microsoft Corporation is an American multinational technology corporation producing computer software, consumer electronics, personal computers, and related services headquartered at the Microsoft Redmond campus located in Redmond, Washing ...
) *
Scroogle Google's changes to its privacy policy on March 16, 2012 enabled the company to share data across a wide variety of services. These embedded services include millions of third-party websites that use AdSense and Analytics. The policy was widely c ...
(Google Scraper) *
Singingfish Singingfish was an audio/video search engine that powered audio video search for Windows Media Player, WindowsMedia.com, RealOne/ RealPlayer, Real Guide,For queries on Real Guide, Singingfish search results appeared in the section "Audio & Video o ...
(acquired by AOL) * Soso * Speechbot *
Sphere A sphere () is a Geometry, geometrical object that is a solid geometry, three-dimensional analogue to a two-dimensional circle. A sphere is the Locus (mathematics), set of points that are all at the same distance from a given point in three ...
(acquired by AOL) *
Startpage A home page (or homepage) is the main web page of a website. The term may also refer to the start page shown in a web browser when the application software, application first opens. Usually, the home page is located at the root of the website's ...
(acquired by System1, an advertising company) *
Tafiti {{for, the historical tribal area of Niue, Tafiti (tribal area) Tafiti was an animated search engine launched by Microsoft Corp. and TrappsInteractive to showcase the Silverlight animation and video player. It was launched in 2007 and was discon ...
(replaced by
Microsoft Bing Microsoft Bing (commonly known as Bing) is a web search engine owned and operated by Microsoft. The service has its origins in Microsoft's previous search engines: MSN Search, Windows Live Search and later Live Search. Bing provides a variety ...
) * Volunia *
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. Wikia Search followed other experiments by Wikia into search eng ...
(defunct) *
WiseNut WiseNut was a crawler-based search engine that officially launched on September 5, 2001. Like Teoma, WiseNut automatically clustered search results, a technology called ''WiseGuide''. Despite being referred to as a "Google killer" and having a g ...
* World Wide Web Worm


See also

*
List of academic databases and search engines This article contains a representative list of notable databases and search engines useful in an academic setting for finding and accessing articles in academic journals, institutional repositories, archives, or other collections of scientific and ...
*
List of web directories A Web directory is a listing of Websites organized in a hierarchy or interconnected list of categories. The following is a list of notable Web directory services. General * DOAJ.org – Directory of Open Access Journals * DMOZ (also known as ...
*
Search aggregator A search aggregator is a type of metasearch engine which gathers results from multiple search engines simultaneously, typically through RSS search results. It combines user specified search feeds (parameterized RSS feeds which return search resul ...
*
Search engine optimization Search engine optimization (SEO) is the process of improving the quality and quantity of Web traffic, website traffic to a website or a web page from web search engine, search engines. SEO targets unpaid traffic (known as "natural" or "Organ ...
* :Search engine software


References


External links

* {{Web search engines
Search engines A search engine is a software system designed to carry out web searches. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a ...