Academia

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

Yelp

An American crowd-sourced review platform where users publish ratings and written feedback about local businesses.

Goodreads

A book-based social media platform owned by Amazon.

OK.ru

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

Stack Overflow

A question-and-answer platform for programmers.

ResearchGate

A social networking platform for scientists and researchers that enables them to share publications, collaborate with peers, and engage in academic discussions online.

SlideShare

A social media platform where people share presentations and infographics.

A video game digital distribution service and storefront developed by Valve Corporation.

Quora

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

WeChat

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

Letterboxd

A social media platform for film lovers.

Google Groups

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

Xing

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

Plurk

A micro-blogging and social networking service.

A Chinese microblogging website.

Beehiiv

A comprehensive newsletter platform designed to help creators and brands build, grow, and monetize their audiences.

HackerOne

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

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.

Hugging Face

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

Meetup

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

Scribd

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

Last.fm

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

Douban

A Chinese social networking site and media database for books, movies, music, and local events.

Wattpad

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