Open Source Social Media
A social account you don't host is a tenant arrangement - the algorithm, the reach, and the suspension button all belong to someone else, and your audience disappears the moment they change the terms. The open source options here run on open federation protocols, so your profile and followers live on a server you or someone you trust controls, and the same posting workflow can schedule across many networks at once instead of locking your reach inside one timeline.
Mastodon
Self-hosted, federated social network server based on ActivityPub and open standards
Postiz
Self-hosted AI social media scheduling tool with analytics, collaboration, and public API access
Lemmy
Decentralized link aggregator and forum for federated communities, with self-hosted servers
diaspora*
Privacy-aware, distributed social network with self-hosted pods and open servers
Misskey
Open source, federated social media software for running an ActivityPub microblogging server
Pixelfed
Decentralized photo sharing platform for the fediverse, with no algorithmic feed barriers
Mixpost
Self-hosted social media management for scheduling, publishing, and team workflows on your own server
Friendica
Decentralized social network for federated communication across the Fediverse and other services
Open Source Social Network
PHP social networking software for running your own community site with profiles, chat, groups, and blogs