Comparison of Q&A sites
The following is a list of websites that follow a question-and-answer format.[clarification needed] The list contains only websites for which an article exists, dedicated either wholly or at least partly to the websites.
For the humor "Q&A site" format first popularized by Forum 2000 and The Conversatron, see Q&A comedy website.
|Website||Founded||Closed||Description/focus||Languages available||Copyrighting of user contributions||Registration required?||Price|
|Ask.fm||2010||—||Social topics||49 languages||Yes|
|Ask MetaFilter||2003||—||Many topics||English||All posts are copyright to their original authors.||No to browse, yes to contribute|
|Baidu Knows||2005||—||Many topics||Chinese||No to browse, yes to contribute|
|Brainly||2009||—||Academic||12 languages||Contributed content owned by its author(s)||No to browse, yes to contribute|
|Brilliant.org||2013||—||Science, technology, math||English||User retains ownership; Brilliant can use, distribute, modify.||Yes/Paid||$599.99 for life time use|
|ChaCha||2006||2016||Many topics||English||Owned by ChaCha||N/A|
|Chegg||2005||—||Academic||English||Owned by Chegg Inc.||Yes / paid|
|eNotes||2005||—||Academic||English||Owned by eNotes.com||Yes / paid||$14.99/month; $49.99/year|
|Experts-Exchange||1996||—||Information technology||Yes / paid|
|Google Questions and Answers||2007||2014||Many topics||Russian, Chinese, English, French||N/A|
|Internet Oracle||1989||—||All topics (humorous)||English||No|
|Knowledge IN||2002||—||Many topics||Korean|
|Quora||2009||—||Many topics||22 languages||Contributions owned by the author. Quora granted "worldwide, non-exclusive, royalty-free license" to content use, distribution, or modification.||Yes, except to view single answers||Free|
|2005||—||All topics||Depends on subreddit||No to browse, yes to contribute|
|Sharecare||2009||—||Health and wellness||English||No|
|Spring.me (formerly Formspring)||2009||2015||All topics||English||Yes|
|Stack Exchange||2008||—||Many topics||English (Q&A about other languages takes place in those languages as well as English)||Contributions owned by the author. Contributions "perpetually and irrevocably licensed to Stack Exchange under the Creative Commons Attribution Share Alike license".||No to browse and answer, yes to ask and contribute fully. Some topics allow asking as a guest.|
|The Straight Dope||1973 (print)||2018||Many topics||English||No|
|Transtutors||2007||—||Academic||English||Owned and operated by Transweb Educational Services||Yes / paid|
|TXN (The Experts Network)||2011||?||Sports||English||No|
|WikiAnswers||2002||2018||Many topics||Subsumed by Answers.com (one of several concurrent URLs)|
|English Wikipedia Reference Desk||2004||—||Many topics||English||CC-BY-SA 3.0 and GFDL dual license||No|
|Yahoo! Answers||2005||2021||All topics||13 languages||Contributions owned by the author. Yahoo retains rights to the use, distribution or modification.||No|
|Zhihu||2011||—||Many topics||Chinese and a few others||Owned and operated by the original authors.||Yes, except to view single answers|
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- Haughey, Matt. "FAQ: Who owns the copyright on MetaFilter content?". MetaFilter. Retrieved 20 May 2014.
- "Brilliant Premium | Brilliant".
- https://www.enotes.com/jax/index.php/checkout/trial 31 January 2020
- "Statement of Rights and Responsibilities". Experience Project. Archived from the original on 13 August 2015. Retrieved 5 August 2015.
- "Terms of Service — Stack Exchange". Stack Exchange. Retrieved 3 January 2016.
- "Terms & Conditions of Transtutors.com". Transtutors. Retrieved 9 January 2014.