List of search engines

This is a list of search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites that have a search facility for online databases. For a list of search engine software, see List of enterprise search vendors.

By content/topic


* Powered by Bing

** Powered by Google

*** Metasearch engine

† Main website is a portal

Based on

  • Ecocho
  • Everyclick (formerly based on
  • Forestle (an ecologically motivated site supporting sustainable rain forests – formerly based on Google)
  • Rectifi



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




Dark Web



Academic materials only:





Geographically limited scope

Name Language Country
Accoona Chinese, English China, United States
Biglobe Japanese Japan
Daum Korean Korea
Egerin Kurdish Kurdistan
Fireball German, English Germany
Goo Japanese Japan Iceland
Maktoob Arab World Hungary Slovenia
Naver Korean Korea
Pipilika Bangladesh
Rambler Russia
Rediff India
SAPO Portugal, Angola, Cape Verde, Mozambique Switzerland
Sesam Norway, Sweden
Seznam Czech Republic
Walla! Israel
Yandex Russia, Turkey, Ukraine, Belarus, Kazakhstan
ZipLocal Canada, United States






Real estate/property


Video Games

By data type




Source code

By model

Search appliances

Desktop search engines

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

Name Platform Remarks License
Autonomy Windows IDOL Enterprise Desktop Search, HP Autonomy Universal Search.[29] 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
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. 5.9 Release now supports x64 systems. As of September 14, 2011, Google has discontinued this product. Freeware
ISYS Search Software Windows ISYS:desktop search software. Proprietary (14-day trial)
Locate32 Windows Graphical port of Unix's locate & updatedb BSD License[30]
Lookeen Windows Desktop search product with Outlook plugin and limited support for other formats via IFilters, uses Lucene search engine. Proprietary (14-day trial)[31]
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 [32]
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 LGPL v2 [33]
Terrier Search Engine Linux, Mac OS X, Unix Desktop search for Windows, Mac OS X (Tiger), Unix/Linux. MPL v1.1[34]
Tracker Linux, Unix Open Source desktop search tool for Unix/Linux GPL v2 [35]
Tropes Zoom Windows Semantic Search Engine (no longer available).[36] Freeware and commercial
Unity Dash Linux Part of Ubuntu Desktop. GPL v3[37], LGPL v2.1[38]
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)[39]

Kids safe search engines

Metasearch engines

Name Language
Dogpile English
Excite English English
Kayak and SideStep Multilingual
Metacrawler English
Mobissimo Multilingual
Otalo English
PCH Search and Win
Searx Multilingual
Skyscanner Multilingual
Yippy (formerly Clusty) English

Natural language

Open source search engines

P2P search engines

Name Language
FAROO English
Seeks (Open Source) English
YaCy (Free and fully decentralized) Multilingual

Privacy search engines

Social and environmental focus

Semantic browsing engines

Social search engines


Visual search engines

By venue type

Search engines dedicated to a specific kind of information


These search engines work across the BitTorrent protocol.




Question and answer

Human answers

Automatic answers

Defunct or acquired search engines

See also


  1. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  2. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  3. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  4. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  5. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  6. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  7. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  8. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  9. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  10. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  11. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  12. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  13. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  14. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  15. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  16. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  17. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  18. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  19. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  20. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  21. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  22. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  23. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  24. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  25. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  26. ^ " Traffic, Demographics and Competitors - Alexa". Retrieved 2018-12-28.
  27. ^ "SimilarWeb". SimilarWeb. Retrieved 20 February 2015.
  28. ^ Sullivan, Danny (April 18, 2007). "Goodbye Froogle, Hello Google Product Search!". Search Engine Land. Retrieved 3 June 2018.
  29. ^ "HP Universal Search". Retrieved 2014-07-01.
  30. ^ According to
  31. ^ "Lookeen 10". Lookeen. Retrieved 2016-02-03.
  32. ^ According to Recoll
  33. ^ According to COPYING in version 0.5.10 tar.bz2 package.
  34. ^ "Terrier License". GitHub.
  35. ^ According to COPYING Archived 2012-07-14 at in SVN trunk.
  36. ^ According to Retrieved 15 August 2015.
  37. ^ "Unity on GitHub". GitHub.
  38. ^ "Required License Files". GitHub.
  39. ^ "X1 Search 8". X1 Technologies. Retrieved 12 July 2014.
  40. ^ Darrow, Barb (October 13, 2017). "Alibaba Is Adding This Key Technology to Its Growing Cloud". Fortune. Retrieved August 21, 2018.
  41. ^ "Data, Data, Everywhere Data. Now a Better Way to Understand It". 27 March 2015.
  42. ^ According to domain liquidation notice at (Italian)

External links

Alexa Internet

Alexa Internet, Inc. is an American web traffic analysis company based in San Francisco. It is a subsidiary of Amazon.

Alexa was founded as an independent company in 1996 and acquired by Amazon in 1999 for $250M worth Amazon Stock. Its toolbar collects data on Internet browsing behavior and transmits them to the Alexa website, where they are stored and analyzed. This is the basis for the company's web traffic reporting, including its Alexa Rank. According to its website, Alexa provides web traffic data, global rankings, and other information on 30 million websites. As of 2018, its website is visited by over 3 million people every month.


ALIWEB (Archie Like Indexing for the WEB) is considered the first Web search engine, as its predecessors were either built with different purposes (the Wanderer, Gopher) or were literally just indexers (Archie, Veronica and Jughead).

First announced in November 1993 by developer Martijn Koster while working at Nexor, and presented in May 1994 at the First International Conference on the World Wide Web at CERN in Geneva, ALIWEB preceded WebCrawler by several months.ALIWEB allowed users to submit the locations of index files on their sites which enabled the search engine to include webpages and add user-written page descriptions and keywords. This empowered webmasters to define the terms that would lead users to their pages, and also avoided setting bots (e.g. the Wanderer, JumpStation) which used up bandwidth. As relatively few people submitted their sites, ALIWEB was not very widely used.

Martijn Koster, who was also instrumental in the creation of the Robots Exclusion Standard, detailed the background and objectives of ALIWEB with an overview of its functions and framework in the paper he presented at CERN.Koster is not associated with a commercial website which uses the aliweb name.


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 Technology, which he started in 1994, which in turn resulted in the formation of Fast Search & Transfer (FAST), established on July 16, 1997. According to FAST, AllTheWeb once rivaled Google in size and technology.


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 search engine. On July 8, 2013, the service was shut down by Yahoo! and since then, the domain has redirected to Yahoo!'s own search site.

Database search engine

A database search engine is a search engine that operates on material stored in a digital database.


Dogpile is a metasearch engine for information on the World Wide Web that fetches results from Google, Yahoo!, Yandex, Bing and results from other popular search engines, including those from audio and video content providers such as Yahoo!.


Egerin is a web search engine (powered by Bing). It is the first search engine in Kurdish language and is focused to provide fully functional search and blog system, including videos, image, and news for the Kurds.


Forestle was an ecologically inspired search engine created by Christian Kroll, Wittenberg, Germany, in 2008 and discontinued in 2011. Forestle supported rainforest conservation through donations of ad revenue and aimed to reduce CO2 emissions. It is quite similar to the search engine Ecosia, which plants new trees with its ad revenue. Forestle was briefly associated with Google before associating with Yahoo.


Infoseek (also known as the "big yellow") was a popular 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 Walt Disney Company in 1999, and the technology was merged with that of the Disney-acquired Starwave to form the network.

List of academic databases and search engines

This page contains a representative list of major 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 other articles.

As the distinction between a database and a search engine is unclear for these complex document retrieval systems, see:

the general list of search engines for all-purpose search engines that can be used for academic purposes

the article about bibliographic databases for information about databases giving bibliographic information about finding books and journal articles.Note that "free" or "subscription" can refer both to the availability of the

database or of the journal articles included. This has been indicated as precisely as possible in the lists below.

List of web directories

A Web directory is a listing of Web sites organized in a hierarchy or interconnected list of categories.

The following is a list of notable Web directory services.

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 software as a service products accessible via a web browser. They may be free or require payment, such as by a monthly subscription. Some have enhanced features such as collaborative editing and email notification.

Search Engine Watch

Search Engine Watch (SEW) provides news and information about search engines and search engine marketing.Search Engine Watch was started by Danny Sullivan in 1996. In 1997, Sullivan sold it for an undisclosed amount to MecklerMedia (now WebMediaBrands). In 2005 the website and related Search Engine Strategies conference series were sold to Incisive Media for $43 million. On November 30, 2006, Danny Sullivan left Search Engine Watch, after his resignation announcement on August 29, 2006. Rebecca Lieb was named editor-in-chief the following month.

In 2015, Incisive Media sold SES, Search Engine Watch, and ClickZ to Blenheim Chalcot.Google's Matt Cutts has called Search Engine Watch "a must read." Yahoo's Tim Mayer has said that it is the "most authoritative source on search."

Search engine (computing)

A search engine is an information retrieval system designed to help find information stored on a computer system. The search results are usually presented in a list and are commonly called hits. Search engines help to minimize the time required to find information and the amount of information which must be consulted, akin to other techniques for managing information overload.The most public, visible form of a search engine is a Web search engine which searches for information on the World Wide Web.

Soup (Apple)

Soup is the file system for the Apple Newton platform, based on a shallow database system. The Newton considers its internal storage, and each inserted card, as a separate "store" (a volume). Any store may have either read/write "soups" (databases) or read-only objects called "packages" (Packages are roughly equivalent to applications, though they may also be storage areas or plug-ins).

A soup is a simple, one-table database of "entries" which may be indexed in different ways and queried by a variety of methods. Various soups store the Newton's equivalent of "documents" or "files." The Newton has a rich set of indexing and querying mechanisms for soups. One important index is the "tags" index. Soup entries may be "tagged" with some user-defined string; applications use these tags to mimic the mechanism of filing entries into "folders," with each folder identified by a user-defined string.

Soups have an accompanying ID symbol which represents a soup of that "kind;" this ID is assigned to a soup by the application which created it and uses it. For example, Hemlock (an Internet search tool for the Newton) maintains two soups, each with a different ID. One soup holds a list of search engines, the other holds the query results.

Soups on different stores may have the same ID, meaning that they are the same kind of soup, just spread out on different cards. When applications access soups, they usually do so by querying and accessing a "union soup" object. From an application's perspective, union soups merge all the soups of a given ID on different stores into one unified soup for that ID. This happens dynamically; when a user adds or removes cards, the union soup changes automatically, each application is notified, and they update their presentation to the user to reflect this. For example, if the user pulls out a card containing a Note Pad soup, the appropriate soup entries (i.e. "notes") in the Note Pad's union soup automatically disappear, the Note Pad is notified, and its display is updated to show that these entries are now gone. Treating documents as database entries in a global union soup made Newtons very apt at handling multiple cards being yanked and inserted while applications are running.

There are a few global soups which all applications use; the most important one is the "System" Soup, which stores global information for applications, commonly application preferences.


Swisscows is a web search engine launched in 2014, a project of Hulbee AG, a company based in Egnach, Switzerland.The search engine is based on semantic data recognition that give faster "answers" to queries. In addition, Swisscows does not store users' data. Swisscows also deems itself "family-friendly", with explicit results entirely omitted. The website's servers are based in underground data centers under the Swiss Alps.Swisscows uses Bing for web search, but has also built its own index for the German language edition. It also has shopping search, music search (powered by SoundCloud), and a language translator powered by Yandex.

As of 2018, there are 20 million monthly search queries, according to Hulbee CEO, Andreas Wiebe.


Teoma, (from Scottish Gaelic teòma "expert"), was an Internet search engine founded in April 2000 by Professor Apostolos Gerasoulis and his colleagues at Rutgers University in New Jersey. Professor Tao Yang from the University of California, Santa Barbara co-led technology R&D. Their research grew out of the 1998 DiscoWeb project. The original research was published in the paper, "DiscoWeb: Applying Link Analysis to Web Search".


WebCrawler is a web search engine, and is the oldest surviving search engine on the web today. For many years, it operated as a metasearch engine. WebCrawler was the first web search engine to provide full text search.

Web search engine

A web search engine or Internet search engine is a software system that is designed to carry out web search (Internet search), which means to search the World Wide Web in a systematic way for particular information specified in a web search query. The search results are generally presented in a line of results, often referred to as search engine results pages (SERPs). The information may be a mix of web pages, images, videos, infographics, articles, research papers and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories, which are maintained only by human editors, search engines also maintain real-time information by running an algorithm on a web crawler.

Internet content that is not capable of being searched by a web search engine is generally described as the deep web.

Alexa global rankings as of 28th of December 2018:
Name Language Alexa global ranking
AOL Search* Multilingual 318 †[1]** Multilingual 125[2]
Baidu Chinese 4[3]
Bing Multilingual 47[4]
Dogpile*** English 10,603[5]
DuckDuckGo* Multilingual 214[6]
Ecosia* Multilingual 700[7]
Exalead Multilingual 116,560[8]
Excite* Multilingual 15,098 †[9]
Gigablast English 135,070[10]
Google Multilingual 1[11]
HotBot* English 298,374[12]
Lycos Multilingual 36,396[13]
MetaCrawler*** English 19,168[14]
Mojeek Multilingual 148,996[15]
Qwant* Multilingual 2,158[16]
Search Encrypt English 2,104[17]
Searx*** Multilingual 93,323[18]
Sogou Chinese 162[19]
Soso Chinese 96[20]** English 1,946[21]
Swisscows* Multilingual 232,931[22]
WebCrawler* English 4,264[23]
Yahoo!* Multilingual 7 †[24]
Yandex Multilingual 1,060
Yippy*** English 137,607[25]
Youdao Chinese 260[26]

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