Open-source alternatives to Slack
3 open-source projects that do what Slack does. Picked or featured by Willet; numbers are from GitHub.
Last updated
| Project | What it does | Stars | License | Last commit | Self-hostable |
|---|---|---|---|---|---|
| Self-hosted team workspace where people and AI agents share channels | 36.2k | Apache-2.0 | Yes | ||
| Team workspace combining email, chat, docs, tasks, CRM and AI agents | 4.8k | AGPL-3.0 | Yes | ||
| Clean, simple web client for chatting on the Matrix network | 3.9k | AGPL-3.0 | Yes |