the open source movement

Team chat

7 open source projects, ranked by health and re-checked every week.

Replacing:− Slack− Microsoft Teams

Ranked by health

  1. Rocket.ChatTeam communication platform with chat, channels, video calls and integrations, built for self-hosting.★ 46k MIT + commercial ee/ TypeScript self-host managed
  2. MattermostSelf-hosted team chat and collaboration platform with channels, threads, calls and integrations.★ 39k AGPL-3.0 + commercial enterprise TypeScript self-host managed
  3. ZulipZulip server and web application. Open-source team chat that helps teams stay productive and focused.★ 26k Apache-2.0 Python self-host managed
  4. ElementMatrix chat client for the web with end-to-end encrypted messaging, rooms and calls.★ 14k AGPL-3.0 TypeScript self-host managed
  5. ChattoA fully-featured team and group chat application that you can easily selfhost.★ 2.8k AGPL-3.0 TypeScript self-host
  6. QuietPrivate peer-to-peer team chat app built on Tor and IPFS, with no central server.★ 2.7k GPL-3.0 TypeScript self-host
  7. Nextcloud TalkChat, audio and video calling and webinar app that runs inside a Nextcloud server.★ 2.2k AGPL-3.0 JavaScript self-host managed