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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 are listed in tables below for comparison purposes. The first table lists the company behind the engine, volume and ad support and identifies the nature of the software being used as
free software Free software or libre software is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. Free software is a matter of liberty, n ...
or
proprietary software Proprietary software is software that is deemed within the free and open-source software to be non-free because its creator, publisher, or other rightsholder or rightsholder partner exercises a legal monopoly afforded by modern copyright and i ...
. The second and third table lists
internet privacy Internet privacy involves the right or mandate of personal privacy concerning the storing, re-purposing, provision to third parties, and displaying of information pertaining to oneself via Internet. Internet privacy is a subset of data privacy. Pr ...
aspects along with other technical parameters, such as whether the engine provides personalization (alternatively viewed as a
filter bubble A filter bubble or ideological frame is a state of intellectual isolationTechnopediaDefinition – What does Filter Bubble mean?, Retrieved October 10, 2017, "....A filter bubble is the intellectual isolation, that can occur when websites make us ...
). Defunct or acquired search engines are not listed here.


Search crawlers

Current search engines with independent crawlers, as of December 2018.


Digital rights


Tracking and surveillance


See also

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Comparison of webmail providers The following tables compare general and technical information for a number of notable webmail providers who offer a web interface in English. The list does not include web hosting providers who may offer email services as a part of hosting p ...
– often merged with web search engines by companies that host both services *
List of search engines 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. By content/topic General ...
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Search engine privacy Search engine privacy is a subset of internet privacy that deals with user data being collected by search engines. Both types of privacy fall under the umbrella of information privacy. Privacy concerns regarding search engines can take many forms, s ...


References

{{Web search engines navbox *
Web 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 ...
Network software comparisons