Rocket.Chat Open source
Rocket.Chat v7.0 Roadmap Webinar
Replace proprietary software
Slack → open source
5 open-source replacements, ranked by GitHub stars. Data mirrored from the open-source community.
Mattermost Open source
Secure Collaboration for Enterprises
Zulip Open source
Organized team chat
Element Open source
Secure, Sovereign Communication Platform
Cinny Open source
Simple, secure Matrix client
