A messaging and social networking app that lets users send photos and videos ("Snaps") that disappear after being viewed by default.

SlideShare

A social media platform where people share presentations and infographics.

ResearchGate

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

Substack

A social media platform for writers and journalists that supports subscription newsletters and monetization.

Stack Overflow

A question-and-answer platform for programmers.

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.

Quora

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

Goodreads

A book-based social media platform owned by Amazon.

Google Groups

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

Ravelry

A community website for knitters, crocheters, and fiber artists.

Beehiiv

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

Keybase

A key directory, secure messaging and file sharing platform.

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.

Steemit

A blockchain-based blogging and social media website.

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.

A Chinese microblogging website.

Stack Exchange

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

Last.fm

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

Product Hunt

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

HackerOne

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

ReverbNation

A social networking site for musicians.

Vero

A social media platform with no ads and no data mining.