Question-and-answer websites

Quora is an American social question-and-answer website and online knowledge market headquartered in Mountain View, California. It was founded on June 25, 2009, and made available to the public on June 21, 2010. Users can post questions, answer questions, and comment on answers that have been submitted by other users.

website for professional and enthusiast programmers

ASKfm (Ask.fm until ) was a Latvian question and answer network launched in June 2010 as a competitor to Formspring. After registration, the user filled out their profile and could ask questions (anonymously or openly), reply on their profile, create photo polls. Also from 2021, app users could communicate anonymously or openly in public chats or tête-à-tête in private chats. The platform had 300 million registered users as of November 2021.

Ask.com (known originally as Ask Jeeves) is an answer engine, e-magazine, and former web search engine, operated by Ask Media Group. It was conceptualized and developed in 1996 by Garrett Gruener and David Warthen, based in Berkeley, California.

online question and answer forum owned by Yahoo!

network of question and answer websites

Zhihu () is a Chinese social question and answer site and news aggregator. Originally based in Chengdu and with creators from Sichuan, China, the website launched on January 26, 2011. The number of registered users on Zhihu exceeded 10 million by the end of 2013, and reached 17 million as of May 2015, with 250 million monthly page views.

website (2002-2006)

Spring.me was a social networking service. Until a rebranding in 2013, it was known as Formspring, a question-and-answer-based social network launched in 2009 by Ade Olonoh, the founder of online form builder Formstack.

Brainly is an education technology company founded in Kraków, Poland and headquartered in New York City.

Answers.com (previously WikiAnswers and originally GuruNet) is an Internet-based knowledge exchange. The Answers.com domain name was purchased by entrepreneurs Bill Gross and Henrik Jones at idealab in 1996. The domain name was acquired by NetShepard and subsequently sold to GuruNet and then AFCV Holdings. The website is now the primary product of the Answers Corporation. It has tens of millions of user-generated questions and answers, and provides a website where registered users can interact with one another.

Sarahah () was a Saudi Arabian social networking service for providing constructive feedback. In Arabic, sarahah means "frankness" or "honesty".

education question and answer platform

human-guided search engine

Stack Exchange site for Ubuntu users and developers

Askimam is a website providing information regarding Islam. It was founded by South African Islamic scholar and jurist Ebrahim Desai in 2000. The answers on this website are reflections of the juristic views of the Hanafi Deobandi school of thought. It has been called more influential, wide-ranging and comprehensive than the web resources of Al-Azhar University and its sympathisers put together.