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.
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?PriceAnswers.com — All topics English FreeAsk.fm Social topics 49 languages YesAskbot N/A varies varies variesAsk MetaFilter — Many topics English All posts are copyright to their original authors. No to browse, yes to contributeAvvo — Legal English YesBaidu Knows — Many topics Chinese No to browse, yes to contributeBlikBook N/A Local academic English YesBlurtit — All topics English YesBrainly — Academic 12 languages Contributed content owned by its author(s) No to browse, yes to contributeBrilliant.org — Science, technology, math English User retains ownership; Brilliant can use, distribute, modify. Yes/Paid$599.99 for life time useChaCha Many topics English Owned by ChaCha N/AChegg — Academic English Owned by Chegg Inc. Yes / paideNotes — Academic English Owned by eNotes.com Yes / paid$14.99/month; $49.99/yearhttps://www.enotes.com/jax/index.php/checkout/trial 31 January 2020Experts-Exchange — Information technology Yes / paidFixya — Consumer products English YesGoogle Answers English YesGoogle Questions and Answers Many topics Russian, Chinese, English, French N/AGutefrage.net — German Yes FreeHealthTap — Health information English NoInternet Oracle — All topics (humorous) English NoJelly All topics English Knowledge IN — Many topics Korean LinkedIn Answers Business YesMadSci Network — Science English Mahalo.com Many topics English N/AОтветы@Mail.Ru — Russian ProfNet — Journalists English YesQuora — 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 answersFreeReddit — All topics Depends on subreddit No to browse, yes to contributeSharecare — Health and wellness English NoSpring.me (formerly Formspring) All topics English YesStack Exchange — 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.Stips2006—All topicsHebrewYesThe Straight Dope (print) 2018 Many topics English NoTranstutors — Academic English Owned and operated by Transweb Educational Services Yes / paidTXN (The Experts Network) ? Sports English NoUclue Many topics English YesWikiAnswers 2018 Many topics Subsumed by Answers.com (one of several concurrent URLs) English Wikipedia Reference Desk — Many topics English CC-BY-SA 3.0 and GFDL dual license NoYahoo! Answers All topics 13 languages Contributions owned by the author. Yahoo retains rights to the use, distribution or modification. NoZhihu — Many topics Chinese and a few others Owned and operated by the original authors. Yes, except to view answers of questions when directed from search engine
See also Comparison of Internet forum software Educational Technology List of Internet forums Knowledge market Q&A software – includes a comparison of self-hostable Q&A software
References