LIMSwiki

Search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites have a search facility for online databases.

Name	Language	Backend ownership
Ask.com	Multilingual	Google
Baidu	Chinese	Baidu
Brave Search	Multilingual	Brave
Dogpile	English	Metasearch engine
DuckDuckGo	Multilingual	Multiple, including Microsoft Bing
Ecosia	Multilingual	Google and Microsoft Bing
Elasticsearch	Multilingual	Apache 2.0 until 2021, then Elasticsearch
Exalead	Multilingual	Cloudview
Excite†	Multilingual	Microsoft Bing
Gigablast	English	Apache License 2.0
Google	Multilingual	Google
HotBot	English	Microsoft Bing
Kagi	English	Metasearch engine and Kagi Inc
Lycos	Multilingual	Microsoft Bing
MetaCrawler	English	Metasearch engine
Microsoft Bing	Multilingual	Microsoft Bing
Mojeek	Multilingual	Mojeek
Opensearch	Multilingual	Apache License 2.0 (Elasticsearch fork)
Petal	Multilingual	Huawei
Qwant	Multilingual	Microsoft Bing
Searx	Multilingual	Metasearch engine
Sogou	Multilingual	Tencent
Startpage	English	Google
Swisscows	Multilingual	Microsoft Bing
WebCrawler	English	Microsoft Bing
YaCy	Multilingual	GPL-2.0-or-later
Yahoo! Search†	Multilingual	Microsoft Bing
Yandex	Multilingual	Yandex
Youdao†	Chinese	NetEase
You.com	English	Microsoft Bing

† Main website is a portal

Name	Language	Country
Accoona	Chinese, English	China, United States
Biglobe	Japanese	Japan
Daum	Korean	Korea
Nate	Korean	Korea
Egerin	Kurdish	Sweden[1][2][3]
Fireball	German, English	Germany
Goo	Japanese	Japan
Leit.is	Icelandic, English	Iceland
Najdi.si	Slovenian	Slovenia
Naver	Korean	Korea
Parsijoo	Persian	Iran
Pipilika (defunct)	Bengali, English	Bangladesh
Rambler	Russian	Russia
Rediff		India
Search.ch		Switzerland
Sesam (defunct)		Norway, Sweden
Seznam	Czech	Czech Republic
Walla!		Israel
Yahoo! Japan	Japanese	Japan (Google backend)
Yongzin	Tibetan	China
ZipLocal	English	Canada, United States

• IFACnet

• Business.com
• Daily Stocks
• GenieKnows (United States and Canada)
• GlobalSpec
• Nexis (Lexis Nexis)
• Thomasnet (United States)

• Shodan (website)

• Openverse, search engine for open content.

• Ahmia
• DuckDuckGo
• TorSearch

General:

• Chegg

Academic materials only:

• BASE (search engine)
• ChemRefer
• CiteULike
• Google Scholar
• Internet Archive Scholar
• Library of Congress
• Semantic Scholar

• Apache Solr
• Jumper 2.0: Universal search powered by Enterprise bookmarking
• Oracle Corporation: Secure Enterprise Search 10g
• Q-Sensei: Q-Sensei Enterprise
• Swiftype: Swiftype Search
• TeraText: TeraText Suite

• Tickex (US, UK)
• TickX (UK, Ireland, Spain, Netherlands)

• RecipeBridge: vertical search engine for recipes
• Yummly: semantic recipe search

• Mocavo.com: family history search engine

• Adzuna (UK)
• CareerBuilder (US)
• Craigslist (by city)
• Dice.com (US)
• Glassdoor (US)
• Indeed (US)
• JobStreet.com (Southeast Asia, Japan, India)
• Monster.com (US), (India)
• Naukri.com (India)
• Rozee.pk (Pakistan)
• Yahoo! HotJobs (Countrywise subdomains, International)

• Google Scholar
• Lexis (Lexis Nexis)
• Quicklaw
• WestLaw

• Bing Health
• Bioinformatic Harvester
• CiteAb (antibody search engine for medical researchers)
• EB-eye EMBL-EBI's Search engine
• Entrez (includes PubMed)
• GenieKnows
• Healia
• Healthline
• Nextbio (Life Science Search Engine)
• PubGene
• Searchmedica
• WebMD

• Taganode Local Search Engine (now defunct)
• Taptu: taptu mobile/social search (now defunct)

• Bing News
• Google News
• Priyo
• Yahoo! News

• Whitepages
• FindFace
• PeekYou
• Spokeo
• Zabasearch.com
• ZoomInfo

• HotPads.com
• Realtor.com
• Redfin
• Rightmove
• StuRents.com
• Trulia
• Zillow
• Zoopla

• TV Genius

• Bustripping

• Sepia Search

• Wazap

Search engines dedicated to a specific kind of information

• Google Code Search
• Koders
• Krugle

These search engines work across the BitTorrent protocol.

• BTDigg
• Isohunt - discontinued
• Mininova - discontinued
• The Pirate Bay
• TorrentSpy - discontinued
• Torrentz - discontinued

• Amatomu
• Bloglines
• IceRocket
• Mojeek (substack only)
• Munax
• Regator
• Technorati

• Fabasoft
• Google Search Appliance - discontinued
• Munax
• Searchdaimon
• Thunderstone

Desktop search engines listed on a light purple background are no longer in active development.

Name	Platform	Remarks	License
HP Autonomy	Windows	IDOL Enterprise Desktop Search, HP Autonomy Universal Search.[5]	Proprietary, commercial
Beagle	Linux	Open-source desktop search tool for Linux based on Lucene. Unmaintained since 2009.	A mix of the X11/MIT License and the Apache License
Copernic Desktop Search	Windows	Major desktop search program. The full trial version downgrades after the trial period automatically to the free version, which is (anno 2018) limited to indexing a maximum of 10.000 files.	Proprietary (30 day trial)
DocFetcher	Cross-platform	Open-source desktop search tool for Windows and Linux, based on Apache Lucene	Eclipse Public License
dtSearch Desktop	Windows		Proprietary (30 day trial)
Everything	Windows	Find files and folders by name instantly on NTFS volumes	Freeware
Found	MacOS	Searches for files stored locally, and the cloud and inbox and, is summoned with a double-tap of the ctrl key. Program now discontinued.	Free, Proprietary
GNOME Storage	Linux	Open-source desktop search tool for Unix/Linux	GPL
Google Desktop	Linux, Mac OS X, Windows	Integrates with the main Google search engine page. As of September 14, 2011, Google has discontinued this product.	Freeware
ISYS Search Software	Windows	ISYS:Desktop search software.	Proprietary (14-day trial)
KRunner	Linux
Locate32	Windows	Graphical port of Unix's locate & updatedb	BSD License[6]
Lookeen	Windows	Desktop search product with Outlook plugin and limited support for other formats via IFilters, uses Lucene search engine.	Proprietary (14-day trial)[7]
Nepomuk	Linux	Open-source semantic desktop search tool for Linux. Has been replaced by Baloo in KDE Applications from release 4.13 onward.	License SA 3.0 and the GNU Free Documentation License 1.2
Recoll	Linux, Unix, Windows, macOS	Open-source desktop search tool for Unix/Linux	GPL [8]
Spotlight	macOS	Found in Apple Mac OS X "Tiger" and later OS X releases.	Proprietary
Strigi	Linux, Unix, Solaris, Mac OS X and Windows	Cross-platform open-source desktop search engine. Unmaintained since 2011-06-02[9].	LGPL v2 [10]
Terrier Search Engine	Linux, Mac OS X, Unix	Desktop search for Windows, Mac OS X (Tiger), Unix/Linux.	MPL v1.1[11]
Tracker	Linux, Unix	Open-source desktop search tool for Unix/Linux	GPL v2 [12]
Tropes Zoom	Windows	Semantic Search Engine (no longer available)[13]	Freeware and commercial
Unity Dash	Linux	Part of Ubuntu Desktop	GPL v3,[14] LGPL v2.1[15]
Windows Search	Windows	Part of Windows Vista and later OSs. Available as Windows Desktop Search for Windows XP and Server 2003. Does not support indexing UNC paths on x64 systems.	Proprietary
X1 Desktop Search	Windows	Major desktop search product along with Copernic Desktop Search	Proprietary (14-day trial)[16]
Wumpus	Cross platform	Desktop search focused on information retrieval research	GPL

• Kiddle
• KidRex
• KidzSearch
• QwantJunior
• Swisscows

Name	Language
Dogpile	English
Excite	English
Info.com	English
Kayak.com	Multilingual
Mamma.com
MetaCrawler	English
MetaGer	Multilingual
Mobissimo	Multilingual
Otalo.com	English
Publisher's clearinghouse Search and Win
Searx	Multilingual
SearXNG	Multilingual
Skyscanner	Multilingual
Wego.com	Multilingual
All In One	English

• Ask.com
• Bing (Semantic ability is powered by Powerset)
• Lexxe
• Perplexity.ai
• SearchGPT

• Gigablast
• Grub

• Apache Solr
• Elasticsearch^{[17][needs update]}

Name	Language
Seeks (open-source)	English
YaCy (free and fully decentralized)	Multilingual

• Ecosia

Name	Description	Speciality
Evi	Specialises in knowledge base and semantic search	answer engine
Swoogle	Searching over 10,000 ontologies	Semantic web documents
Yebol	defunct
Yummly	Semantic web search for food, cooking, and recipes	food related

• ChaCha Search
• Delver
• Eurekster
• Facebook Search
• Mahalo.com
• Rollyo
• Sproose
• Trexy

• Google Groups (formerly Deja News)

• FindFace
• Grokker
• Macroglossa
• TinEye
• Viewzi

Name	Backend ownership	Demise
iWon	Ask.com	Shut down after AT&T merger[citation needed]
Teoma	Ask.com	Merged to Ask.com which still uses its algorithms
A9.com	Microsoft Bing	Redirect to Amazon homepage (parent company)
AOL	Google until 2015, then Microsoft Bing	Merged to Yahoo!
Alexa Internet	Microsoft Bing	Bought by Amazon in 1999, shut down in 2021
Ciao!	Microsoft Bing	Shut down in 2018
Ms. Dewey	Microsoft Bing	January 2009
Groovle	Google	Taken over by Google after Google sued for name similarity
MySpace Search	Google	Function taken over by Google in 2006
Mystery Seeker	Google	Novelty "search"; went offline in 2017
Netscape	Google	Now redirects to AOL
Ripple	Google	as of 2017 at the latest
Ecocho	Google, then Yahoo!
Forestle	Google, then Yahoo!	Redirected to Ecosia in 2011
Yippy	IBM Watson	Redirected to DuckDuckGo in 2021
Grams	Grams (anonymous owner)	Closed in 2017

• AlltheWeb (acquired by Yahoo!)
• AltaVista (acquired by Yahoo! in 2003, shut down in 2013)
• Bixee.com (India) (acquired by Ibibo)
• Blekko (acquired by IBM in 2015 for its use for Watson-based products)^[18]
• BlogScope (acquired by Marketwire)
• BRS/Search (now OpenText Livelink ECM Discovery Server)
• Btjunkie
• Cuil (patents acquired by Google after shutdown)
• DeepPeep
• Direct Hit Technologies (acquired by Ask Jeeves in January, 2000)
• Getit Infoservices Private Limited
• Google Answers
• GoPubMed
• hakia
• IBM STAIRS
• Infoseek (acquired by Disney)
• Inktomi
• Ixquick (merged into Startpage)
• Jubii
• Kartoo
• LeapFish
• Lotus Magellan
• MetaLib
• mozDex
• Munax
• Myriad Search
• Overture.com (formerly GoTo.com, now Yahoo! Search Marketing)
• PubSub
• RetrievalWare (acquired by Fast Search & Transfer and now owned by Microsoft)
• Scroogle (Google Scraper)
• Singingfish (acquired by AOL)
• Soso
• Speechbot
• Sphere (acquired by AOL)
• Startpage (acquired by System1, an advertising company)
• Tafiti (replaced by Microsoft Bing)
• Volunia^[19]
• Wikia Search (defunct)
• WiseNut
• World Wide Web Worm

• List of academic databases and search engines
• List of web directories
• Search aggregator
• Search engine optimization
• Category:Search engine software