Last.fm

A music streaming and discovery platform with Internet radio and a community for music discussion.

Academia

A social networking platform for academics that enables users to share research papers, build professional profiles, and connect with other researchers worldwide.

Letterboxd

A social media platform for film lovers.

Discord

An instant messaging and VoIP social platform that allows users to communicate via text chat, voice, and video.

VK

A Russian social media and social networking service that allows users to communicate, share content, and join online communities.

HackerOne

A cybersecurity platform that connects businesses with ethical hackers, penetration testers and cybersecurity researchers.

Stack Overflow

A question-and-answer platform for programmers where users can ask, answer, and vote on technical questions related to software development.

OK.ru

A Russian social networking service with more than 300 million registered users.

Line

A Japanese instant messaging and social networking app often described as a super-app because it integrates services such as a digital wallet, news feed, digital comics, media streaming, and shopping.

Stack Exchange

A multi-topic question-and-answer platform for questions about math, games, languages, cooking, biology, and more.

Hatena Bookmark

The most popular social bookmarking service in Japan.

Pixiv

A Japanese online community for artists.

Strava

A fitness tracking app and community-moderated social network for athletes.

Scribd

A digital document library and reading subscription service that provides access to millions of e-books, audiobooks, magazines, and user-uploaded documents.

Link in Bio

A link tree tool that provides users with a mini web page to share links to their social profiles and other important resources.

Hugging Face

A machine learning and data science platform and community that helps users build, deploy and train machine learning models.

LibraryThing

A social cataloging and social networking site for book lovers.

Google Groups

A Google service that provides discussion groups for people sharing common interests.

Bluesky

A social network designed to operate without control by a single company, built as a reference implementation of the AT Protocol for distributed social networks.

WeChat

A Chinese instant messaging, social media, and mobile payment app that has evolved into a super-app combining communication, commerce, and everyday services.

Wattpad

A social platform for people who love to read and write.

Steam Community

A social networking site for gamers.

ReverbNation

A social networking site for musicians.

Meetup

A social media platform for organizing in-person activities and meeting people in your local area.

Substack

An online publishing and social platform for writers and journalists that enables creating subscription-based newsletters, podcasts, and multimedia content delivered directly to subscribers.