Anonymous social media

4chan is an anonymous English-language imageboard website. Launched by Christopher "moot" Poole in October 2003, the site hosts boards dedicated to a wide variety of topics, including video games, television, literature, cooking, weapons, music, history, technology, anime, physical fitness, politics, and sports, among others. Registration is not available, except for staff, and users typically post anonymously. , 4chan receives more than 22 million unique monthly visitors, of whom approximately half are from the United States.

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.

, also known as 2ch, Channel 2, and sometimes retrospectively as 2ch.net, was an anonymous Japanese textboard founded in 1999 by Hiroyuki Nishimura. Described in 2007 as "Japan's most popular online community", the site had a level of influence comparable to that of traditional mass media such as television, radio, and magazines. At the time, the site drew an annual revenue of around (about US$1 million), and was the largest of its kind in the world, with around ten million visitors and 2.5 million posts made per day.

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.

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

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Dvach ('', from dva'' "two" and "chan"), also known as 2ch, is the largest Russian anonymous imageboard. It is a successor to an older Russian imageboard with the same name that was launched in 2006 but shut down three years later in 2009. As of 2024 the imageboard can be accessed via the 2ch.hk domain name. It is owned and run by Russian-born Azerbaijani Nariman Namazov, nicknamed Abu.