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.

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.

VK

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

Goodreads

A book-based social media platform owned by Amazon.

Pixelfed

A decentralized open-source social network service for photo sharing.

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.

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.

Quora

A question-and-answer platform where users can ask questions and provide answers on a wide range of topics.

Scribd

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

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 community for artists.

Diaspora

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

Gitter

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

ReverbNation

A social networking site for musicians.

Hugging Face

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

A Chinese microblogging website.

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.