Academia

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

Xing

A German career-oriented social networking platform focused on professional connections across industries mostly in the German-speaking market.

Letterboxd

A social media platform for film lovers.

VK

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

Meetup

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

Stack Overflow

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

Goodreads

A book-based social media platform owned by Amazon.

Flipboard

A social news aggregator and content discovery platform.

WeChat

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

Pixelfed

A decentralized social network service for photo sharing powered by Pixelfed open-source software.

Scribd

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

Quora

A question-and-answer platform where users ask, answer, edit, and organize discussions across a wide range of topics through community-driven knowledge sharing.

Stack Exchange

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

Google Groups

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

LibraryThing

A social cataloging and social networking site for book lovers.

Strava

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

Keybase

A key directory, secure messaging and file sharing platform.

Pixiv

A Japanese online art community where artists share and discover illustrations, manga, novels, and animation-inspired artwork, with a strong focus on anime, game, and fan art culture.

Diaspora

A nonprofit, user-owned, distributed social network based on Diaspora open source software.

Product Hunt

A platform for discovering and sharing new technology products, including apps, tools, and services.

Last.fm

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

ReverbNation

A social networking site for musicians.

Gitter

An open-source chat and networking platform for software developers based on the Matrix protocol.

QQ

A Chinese instant messaging software platform.

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.