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.
* Powered by Bing
** Powered by Google
*** Metasearch engine
† Main website is a portal
|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|
Academic materials only:
|Accoona||Chinese, English||China, United States|
|SAPO||Portugal, Angola, Cape Verde, Mozambique|
|Yandex||Russia, Turkey, Ukraine, Belarus, Kazakhstan|
|ZipLocal||Canada, United States|
Desktop search engines listed on a light purple background are no longer in active development.
|Autonomy||Windows||IDOL Enterprise Desktop Search, HP Autonomy Universal Search.||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|
|Lookeen||Windows||Desktop search product with Outlook plugin and limited support for other formats via IFilters, uses Lucene search engine.||Proprietary (14-day trial)|
|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 Has been replaced by Baloo in KDE Applications from release 4.13 onward.||License SA 3.0 and the GNU Free Documentation License 1.2|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 |
|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 |
|Terrier Search Engine||Linux, Mac OS X, Unix||Desktop search for Windows, Mac OS X (Tiger), Unix/Linux.||MPL v1.1|
|Tracker||Linux, Unix||Open Source desktop search tool for Unix/Linux||GPL v2 |
|Tropes Zoom||Windows||Semantic Search Engine (no longer available).||Freeware and commercial|
|Unity Dash||Linux||Part of Ubuntu Desktop.||GPL v3, LGPL v2.1|
|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)|
|Kayak and SideStep||Multilingual|
|PCH Search and Win|
|Yippy (formerly Clusty)||English|
|Seeks (Open Source)||English|
|YaCy (Free and fully decentralized)||Multilingual|
Search engines dedicated to a specific kind of information
These search engines work across the BitTorrent protocol.
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
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
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
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
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
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
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
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 Go.com 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
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
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
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.
|Name||Language||Alexa global ranking|
|AOL Search*||Multilingual||318 †|