Chat & Team Communication
Self-hostable team chat and community platforms instead of Slack or Discord.

Stoat
Self-hosted Discord-style chat platform with servers, channels, roles, and LiveKit voice.

Mattermost
Self-hosted team messaging focused on secure collaboration for engineering teams.

Rocket.Chat
Open-source team chat and omnichannel platform with channels, video, and customer messaging.

Zulip
Topic-threaded open-source team chat built for asynchronous, low-noise discussion.