Comparison of Q&A sites
The following is a list of websites that follow a question-and-answer format. The list contains only websites for which an article exists, dedicated either wholly or at least partly to the websites.
| Website | Founded | Closed | Description/focus | Languages available | Copyrighting of user contributions | Registration required? | Price | - |
| 3form | Many topics | English | N/A | N/A | - | |||
| 4chan | — | All topics | Mostly English | Free | ||||
| 8chan | — | All topics | Mostly English | Free | ||||
| Answers.com | — | All topics | English | Free | - | |||
| Ask.fm | — | Social topics | 49 languages | Yes | - | |||
| Askbot | N/A | varies | varies | varies | - | |||
| Ask MetaFilter | — | Many topics | English | All posts are copyright to their original authors. | No to browse, yes to contribute | - | ||
| Avvo | — | Legal | English | Yes | - | |||
| Baidu Knows | — | Many topics | Chinese | No to browse, yes to contribute | - | |||
| BlikBook | N/A | Local academic | English | Yes | - | |||
| Blurtit | — | All topics | English | Yes | - | |||
| Brainly | — | Academic | 12 languages | Contributed content owned by its author | No to browse, yes to contribute | - | ||
| Brilliant.org | — | Science, technology, math | English | User retains ownership; Brilliant can use, distribute, modify. | Yes/Paid | $599.99 for life time use | - | |
| ChaCha | Many topics | English | Owned by ChaCha. | N/A | - | |||
| Chegg | — | Academic | English | Owned by Chegg Inc. | Yes / paid | - | ||
| eNotes | — | Academic | English | Owned by eNotes.com | Yes / paid | $14.99/month; $49.99/year | - | |
| Experience Project | 2016 | Social topics | English | Terms of use for Experience Project | anonymous | - | ||
| Experts-Exchange | — | Information technology | Yes / paid | - | ||||
| Fixya | — | Consumer products | English | Yes | - | |||
| Google Answers | English | Yes | - | |||||
| Google Questions and Answers | Many topics | Russian, Chinese, English, French | N/A | - | ||||
| Gutefrage.net | — | German | Yes | Free | - | |||
| HealthTap | — | Health information | English | No | - | |||
| Internet Oracle | — | All topics | English | No | - | |||
| Jelly | All topics | English | - | |||||
| JustAnswer | — | All topics | English, Spanish, German, Japanese | Yes | No | |||
| Knowledge Search | — | Many topics | Korean | - | ||||
| LinkedIn Answers | Business | Yes | - | |||||
| MadSci Network | — | Science | English | - | ||||
| Mahalo.com | Many topics | English | N/A | - | ||||
| Ответы@Mail.Ru | — | Russian | - | |||||
| ProfNet | — | Journalists | English | Yes | - | |||
| Quora | — | 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 | - | ||
| — | All topics | Depends on subreddit | No to browse, yes to contribute | - | ||||
| Sharecare | — | Health and wellness | English | No | - | |||
| Spring.me | All topics | English | Yes | - | ||||
| Stack Exchange | — | Many topics | 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 | — | Many topics | English | No | - | |||
| Transtutors | — | Academic | English | Owned and operated by Transweb Educational Services | Yes / paid | - | ||
| TXN | ? | Sports | English | No | - | |||
| Uclue | Many topics | English | Yes | - | ||||
| WikiAnswers | 2018 | Many topics | Subsumed by Answers.com | - | ||||
| — | Many topics | English | CC-BY-SA 3.0 and GFDL dual license | No | - | |||
| Yahoo! Answers | — | All topics | 13 languages | Contributions owned by the author. Yahoo retains rights to the use, distribution or modification. | No | - | ||
| Zhihu | — | Many topics | Chinese and a few others | Owned and operated by the original authors. | Yes, except to view single answers | - |