Open-source Communication software
Chat, video and team communication
- MastodonAlternative to X
A federated social network server that you run yourself and that connects with other Mastodon servers.
AGPL-3.0Self-hosted50kGitHub stars - Rocket.ChatAlternative to Slack, Microsoft Teams
A self-hostable team communications platform with chat, channels, and omnichannel customer messaging.
MITSelf-hostedCloud46kGitHub starsSome features paywalled - MattermostAlternative to Slack
A self-hostable team chat platform with channels, threads and integrations, popular for secure and technical teams.
AGPL-3.0Self-hostedCloud39kGitHub starsSome features paywalled - Jitsi MeetAlternative to Zoom
A browser-based video conferencing server and web app that needs no account to join, which you can run yourself or use through 8x8's hosted services.
Apache-2.0Self-hostedCloud30kGitHub stars - ZulipAlternative to Slack
A self-hostable team chat app that organizes every conversation into topics inside channels.
Apache-2.0Self-hostedCloud26kGitHub stars
