SelfHostOffice
Category

Open-source team chat software

Channels, DMs and calls. 2 self-hostable tools.

Compare alternatives to Slack
2 tools

Rocket.Chat

Team chat

The Secure CommsOS™ for mission-critical operations

46k Custom / see repo Active
Replaces Slack

Mattermost

Team chat

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

39k Custom / see repo Active
Replaces Slack