Friendica

Friendica is open source server software for running your own social network. It connects to other Friendica servers and to platforms like Mastodon, Pleroma, or even Twitter and Tumblr. You host your own data, control privacy settings, and avoid the walled gardens of central services. It supports a wide range of features including groups, private messages, photo albums, calendars, and event planning. The software is written in PHP and uses a MySQL or PostgreSQL database. It runs on any Linux server with a web server and supports federation via the ActivityPub protocol, making it compatible with the Fediverse. Friendica also supports email integration and can import contacts from Facebook or Google+.

You can install Friendica on your own domain or use a hosted provider. It is free software licensed under the Affero GPL version 3, which encourages community contribution. The project originated from Mike Macgirvin in 2010 and is maintained by a volunteer team. It works well for individuals, families, or communities who want a private social web. Friendica is mature and stable, with a significant European user base and active development on GitHub.