Twitter is an online social networking service that enables users to send and read short 280-character messages called "tweets".
Diaspora is a federated social networking service, designed to be a more privacy-aware alternative to Facebook . Share what you want, with whom you want.
Gab Social is an open source and fully decentralized social network powered by the Gab Platform. It is the new social network of Gab.com. This change was made to further Gab's commitment to its users trust and privacy online.
Gab is less moderated compared to other social networks and could be offensive to some people
We are a free and open-source platform to launch your digital brand, social network and mobile app. We are also a social network ourselves. It is a global social network of social networks. Available in either decentralized or centralized options.
Friendica is a distributed social network application. Which allow users to connect with others via their own Friendica server, but may also fully integrate contacts from other platforms including Twitter, diaspora*, Pump.io and StatusNet into their 'newsfeed'.
GNU social is a continuation of the StatusNet project. It is social communication software for both public and private communications. It is widely supported and has a large userbase.
HumHub is a free social network software and framework built to give you the tools to make teamwork easy and successful.
Used to be called Sgrouples, now its MeWe offered by the company Sgrouples Inc. On its homepage their motto is "The World's Private Communication Network" and "Join the privacy revolution".
Social networking in a box. Build a social network for your company, school, sports team or niche community all based on the power and flexibility of WordPress. Install BuddyPress directly through your WordPress dashboard plugins page, or download it manually from the WordPress.
Okuna (formerly Openbook) is an open-source, zero tracking, zero spying, zero advertisement, secure social network that gives 30% of it's revenue towards making the world a better place, now and forever.Discontinued
Discontinued as of December 26, 2021: https://www.okuna.io/