Matterbridge
Team ChatBridge messages between many chat platforms
Replaces Slack
Best Cross-Platform Team Chat for self-hosting
The 4 best Cross-Platform team chat you can self-host, ranked by community traction.
Zulip Terminal
Team ChatTerminal client for the Zulip team chat platform
Replaces Slack
Spark IM
Team ChatCross-platform XMPP instant messaging client
Replaces Slack, Skype
Virola Messenger
Team ChatInstant messaging and collaboration tool with private and group chat
No apps match these filters.
At a glance
| App | Deploy effort | Difficulty | Min. RAM | License | ★ Stars |
|---|---|---|---|---|---|
| Matterbridge | Under-an-hour setup | Medium | 64 MB | Apache-2.0 | 7,586 |
| Zulip Terminal | Read-the-docs project | Easy | 128 MB | Apache-2.0 | 871 |
| Spark IM | Read-the-docs project | Easy | 256 MB | Apache-2.0 | 607 |
| Virola Messenger | Read-the-docs project | Medium | 512 MB | ⊘ Proprietary | — |
Quick picks
- Most adopted: Matterbridge (7,586 GitHub stars).
- Lightest footprint: Matterbridge (from 64 MB RAM, against 512 MB for the heaviest here).
- Licensing: 3 of 4 use Apache-2.0; check the rest individually if you plan to modify and redistribute.
Every option here is open-source and self-hostable, tagged Cross-Platform within the team chat category. Deploy effort is graded from published container recipes, not vendor claims — see the methodology.