Mattermost vs Rocket.Chat
Comparing two open source alternatives to Discord . Use the comparison below to decide which one fits your needs.
Mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Side-by-side comparison
| Mattermost |  Rocket.Chat | |
|---|---|---|
| License | — | MIT |
| Self-hostable | No | Yes |
| GitHub Stars | 36,669 | 45,297 |
| Forks | 8,608 | 13,564 |
| Open Issues | 851 | 3,693 |
| Last Commit | May 12, 2026 | May 12, 2026 |
| First Released | Jun 15, 2015 | May 19, 2015 |
| Categories | ||
| Tags | — |
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