The Secure CommsOS™ for mission-critical operations
Channels, threads and federation, self-hosted.
- Language
- TypeScript
- Licence
- Other
- Stars
- 46k
- Latest
- 9.0.0
- Last push
- 2026-11-12
alternatives to
Mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Rocket.Chat and Zulip. 2 alternatives to Mattermost, in TypeScript, Python. Compare fit, licence, stars and the latest signed release.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| Rocket.Chat | Full replacement | 46k | Other | Open core | Yes | TypeScript | 9.0.0 | 2026-11-12 |
| Zulip | Full replacement | 26k | Apache-2.0 | Open source | Yes | Python | 12.4 | 2026-11-11 |
Every alternative
2 alternatives
Zulip server and web application. Open-source team chat that helps teams stay productive and focused.
Conversations split into topics inside each channel.
- Language
- Python
- Licence
- Apache-2.0
- Stars
- 26k
- Latest
- 12.4
- Last push
- 2026-11-11
Head to head
About Mattermost
- Language
- TypeScript
- Licence
- Other
- Stars
- 40k
- Last push
- 2026-11-12