Editing List of search engines (section)

== By model ==

=== Search appliances ===
{{main|Search appliance}}
* [[Fabasoft]]
* [[Google Search Appliance]] - discontinued
* [[Munax]]
* [[Searchdaimon]]
* [[Thunderstone Software LLC.|Thunderstone]]

=== Desktop search engines ===
[[Desktop search]] engines listed on a light purple background are no longer in active development.
{|class="wikitable sortable" style="text-align=left;"
! Name
! Platform
! Remarks
! License
|-
! [[HP Autonomy]]
| [[Microsoft Windows|Windows]]
| IDOL Enterprise Desktop Search, HP Autonomy Universal Search.<ref>{{cite web |url=http://www.autonomy.com/products/universal-search |title=HP Universal Search |access-date=2014-07-01 |archive-date=2015-05-16 |archive-url=https://web.archive.org/web/20150516141232/http://www.autonomy.com/products/universal-search |url-status=dead }}</ref>
| {{proprietary|Proprietary, commercial}}
|-
! {{rh2|align=center}} | [[Beagle (software)|Beagle]]
| [[Linux]]
| Open-source desktop search tool for Linux based on Lucene. Unmaintained since 2009.
| {{free|A mix of the [[X11/MIT License]] and the [[Apache License]]}}
|-
! [[Copernic Desktop Search]]
| [[Microsoft Windows|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.
<!-- Can we remove this? It is not a relevant "remark" and the cited study is no longer available. See [[Talk:Desktop search#The article does not educate the reader and needs to be rewritten]]

Considered best overall search engine in 2005 UW benchmark study.<ref>{{cite web | url = http://www.uwebi.org/reports/desktop_search.pdf | title = Benchmark Study of Desktop Search Tools | access-date = 2008-03-10}}</ref>
-->
|{{proprietary|Proprietary (30 day trial)}}
|-
! [[DocFetcher]]
| Cross-platform
| Open-source desktop search tool for Windows and Linux, based on [[Apache Lucene]]
| {{free|[[Eclipse Public License]]}}
|-
! [[DtSearch|dtSearch Desktop]]
| [[Microsoft Windows|Windows]]
|
| {{proprietary|Proprietary (30 day trial)}}
|-
! [[Everything (software)|Everything]]
| [[Microsoft Windows|Windows]]
| Find files and folders by name instantly on NTFS volumes
| {{nonfree|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
|-
! {{rh2|align=center}} | [[GNOME Storage]]
| [[Linux]]
| Open-source desktop search tool for Unix/Linux
| {{free|GPL}}
|-
! {{rh2|align=center}} | [[Google Desktop]]
| [[Linux]], [[Mac OS X]], [[Microsoft Windows|Windows]]
| Integrates with the main Google search engine page. As of September 14, 2011, Google has discontinued this product.
| {{nonfree|Freeware}}
|-
! [[ISYS Search Software]]
| [[Microsoft Windows|Windows]]
| [[ISYS:Desktop]] search software.
| {{proprietary|Proprietary (14-day trial)}}
|-
![[KRunner]]
|[[Linux]]
|
|
|-
! {{rh2|align=center}} | [[Locate32]]
| [[Microsoft Windows|Windows]]
| Graphical port of [[Unix]]'s locate & updatedb
| {{free|[[BSD License]]<ref>{{Cite web|url=https://www.softpedia.com/get/Internet/Servers/Database-Utils/Locate32.shtml|title=Download Locate32 3.1.11.7100|website=softpedia|date=20 August 2012}}</ref>}}
|-
! {{rh2|align=center}} | [[Lookeen]]
| [[Microsoft Windows|Windows]]
| Desktop search product with Outlook plugin and limited support for other formats via IFilters, uses Lucene search engine.
| {{proprietary|Proprietary (14-day trial)}}<ref>{{cite web |url=https://www.lookeen.com/ |title=Lookeen 10 |publisher=Lookeen |access-date=2016-02-03}}</ref>
|-
! [[NEPOMUK (software)|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
| {{free|GPL <ref>According to [https://www.lesbonscomptes.com/recoll/ Recoll]</ref>}}
|-
! [[Spotlight (software)|Spotlight]]
| [[macOS]]
| Found in [[Apple Inc.|Apple]] [[Mac OS X]] "[[Mac OS X v10.4|Tiger]]" and later OS X releases.
| {{proprietary|Proprietary}}
|-
! {{rh2|align=center}} | [[Strigi]]
| [[Linux]], [[Unix]], [[Solaris (operating system)|Solaris]], [[Mac OS X]] and [[Microsoft Windows|Windows]]
| Cross-platform open-source desktop search engine. Unmaintained since 2011-06-02{{#tag:ref|See {{cite web|url=https://sourceforge.net/projects/strigi/files/ |author= |date= |accessdate=2024-01-18|title=Strigi's Release Files}}}}.
| {{free|LGPL v2 <ref>According to [https://sourceforge.net/projects/strigi/files/strigi/0.5.10/strigi-0.5.10.tar.bz2/download COPYING] inside version 0.5.10 tar.bz2 package.</ref>}}
|-
! [[Terrier Search Engine]]
| [[Linux]], [[Mac OS X]], [[Unix]]
| Desktop search for Windows, Mac OS X (Tiger), Unix/Linux.
| {{free|[[Mozilla Public License|MPL v1.1]]}}<ref>{{cite web |title=Terrier License |url=https://github.com/terrier-org/terrier-core/blob/4.2/LICENSE.txt |website=GitHub|date=13 November 2021 }}</ref>
|-
! [[Tracker (search software)|Tracker]]
| [[Linux]], [[Unix]]
| Open-source desktop search tool for Unix/Linux
| {{free|GPL v2 <ref>According to [http://svn.gnome.org/viewvc/tracker/trunk/COPYING?view=markup COPYING] {{webarchive|url=https://archive.today/20120714094437/http://svn.gnome.org/viewvc/tracker/trunk/COPYING?view=markup |date=2012-07-14}} in SVN trunk.</ref>}}
|-
! {{rh2|align=center}} | [[Tropes Zoom]]
| [[Microsoft Windows|Windows]]
| Semantic Search Engine (no longer available)<ref>{{Cite web |url=http://www.semantic-knowledge.com/download.htm |title=Retrieved 15 August 2015. |access-date=16 August 2015 |archive-date=6 August 2019 |archive-url=https://web.archive.org/web/20190806185027/http://www.semantic-knowledge.com/download.htm |url-status=dead }}</ref>
| {{nonfree|Freeware and commercial}}
|-
! [[Unity Dash]]
| [[Linux]]
| Part of [[Ubuntu Desktop]]
| {{free|GPL v3}},<ref>{{cite web |title=Unity on GitHub |url=https://github.com/ubports/unity8/blob/xenial/COPYING |website=GitHub|date=19 November 2021 }}</ref> LGPL v2.1<ref>{{cite web |title=Required License Files |url=https://github.com/ubports/unity8/blob/xenial/COPYING.LGPL |website=GitHub|date=19 November 2021 }}</ref>
|-
! [[Windows Search]]
| [[Microsoft Windows|Windows]]
| Part of [[Windows Vista]] and later OSs. Available as [[Windows Desktop Search]] for [[Windows XP]] and [[Windows Server 2003|Server 2003]]. Does not support indexing UNC paths on x64 systems.
| {{proprietary|Proprietary}}
|-
! [[X1 Technologies|X1 Desktop Search]]
| [[Microsoft Windows|Windows]]
| Major desktop search product along with [[Copernic Desktop Search]]
| {{proprietary|Proprietary (14-day trial)}}<ref>{{cite web | url=https://www.x1.com/products/x1-search/ | title=X1 Search 8 | publisher=X1 Technologies | access-date=12 July 2014}}</ref>
|-
!Wumpus
|Cross platform
|Desktop search focused on information retrieval research
|GPL
|}

<!--Add
* Alfred
* Albert
* Cerebro
* Gnome search
* Launchy
* Powertoys Run
* Rofi
* Synapse
* Ulauncher
-->

=== Child-safe search engines ===
* [[Kiddle (search engine)|Kiddle]]
* [[KidRex]]
* [[KidzSearch]]
* [[Qwant|QwantJunior]]
* [[Swisscows]]

=== Metasearch engines ===
{{main|Metasearch engine}}
{| class="wikitable sortable"
|-
! Name !! Language
|-
|[[Dogpile]] || [[English language|English]]
|-
|[[Excite (web portal)|Excite]] || [[English language|English]]
|-
|[[Info.com]] || [[English language|English]]
|-
|[[Kayak.com]] || Multilingual
|-
|[[Mamma.com]] ||
|-
|[[MetaCrawler]] || [[English language|English]]
|-
|[[MetaGer]] || Multilingual
|-
|[[Mobissimo]] || Multilingual
|-
|[[Otalo.com]] || [[English language|English]]
|-
|[[Publisher's clearinghouse#Online development|Publisher's clearinghouse Search and Win]] ||
|-
|[[Searx]] || Multilingual
|-
|[[SearXNG]]
|Multilingual
|-
|[[Skyscanner]] || Multilingual
|-
|[[Wego.com]] || Multilingual
|-
|[https://all-io.net/ All In One] || English
|}

=== Natural language ===
{{See also|Natural language search engine|Semantic search}}
* [[Ask.com]]
* [[Bing (search engine)|Bing]] (Semantic ability is powered by Powerset)
* [[Lexxe]]
* [[Perplexity.ai]]
* [[SearchGPT]]

=== Open-source search engines ===
{{div col}}
* [[Ht-//Dig|ht://Dig]]
* [[Isearch]]
* [[Lemur Toolkit & Indri Search Engine]]
* [[Lucene]]
* [[mnoGoSearch]]
* [[Nutch]]
* [[Openverse]]
* [[Recoll]]
* [[Searchdaimon]]
* [[SearXNG]]
* [[Seeks]]
* [[Sphinx (search engine)|Sphinx]]
* [[SWISH-E]]
* [[Terrier Search Engine]]
* [[Xapian]]
* [[YaCy]]
* [[Zettair]]
{{div col end}}

==== Web search engine ====
* [[Gigablast]]
* [[Grub (search engine)|Grub]]

==== Enterprise search ====
{{See also|Enterprise search}}
*[[Apache Solr]]
*[[Elasticsearch]]<ref>{{cite news |last1=Darrow |first1=Barb |title=Alibaba Is Adding This Key Technology to Its Growing Cloud |url=https://fortune.com/2017/10/13/alibaba-cloud-elasticsearch/ |access-date=August 21, 2018 |work=[[Fortune (magazine)|Fortune]] |date=October 13, 2017}}</ref>{{update inline|date=September 2022}}

=== P2P search engines ===
{| class="wikitable sortable"
|-
!Name !! Language
|-
|[[Seeks]] (open-source) ||[[English language|English]]
|-
|[[YaCy]] (free and fully decentralized) ||Multilingual
|}

=== Privacy search engines ===
{{See also|Search engine privacy}}
{{div col}}
* [[Brave Search]]
* [[DuckDuckGo]]
* [[HotBot]]
* [[Kagi (search engine)|Kagi]]
* [[MetaGer]]
* [[Mojeek]]
* [[Qwant]]
* [[SearXNG]]
* [[Startpage.com]]
* [[Swisscows]]
* [[You.com]]
{{div col end}}

=== Social and environmental focus ===
* [[Ecosia]]

=== Semantic browsing engines ===
{{See also|Semantic search}}
{| class="wikitable sortable"
|-
! Name !! Description !! Speciality
|-
| [[Evi (software)|Evi]] || Specialises in knowledge base and semantic search || answer engine
|-
|[[Swoogle]]|| Searching over 10,000 ontologies || Semantic web documents
|-
|[[Yebol]]|| colspan="2" |defunct
|-
| [[Yummly]] || Semantic web search for food, cooking, and recipes || food related
|}

=== Social search engines ===
{{See also|Social search|Relevance feedback|Human search engine}}
* [[ChaCha Search]]
* [[Delver (Social Search)|Delver]]
* [[Eurekster]]
* [[Facebook]] Search
* [[Mahalo.com]]
* [[Rollyo]]
* [[Sproose]]
* [[Trexy]]

=== Usenet ===
* [[Google Groups]] (formerly [[Deja News]])

=== Visual search engines ===
{{main|Visual search engine}}
* [[FindFace]]
* [[Grokker]]
* [[Macroglossa Visual Search|Macroglossa]]
* [[TinEye]]
* [[Viewzi]]