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 | 39,306 | 46,244 |
| Forks | 9,043 | 13,960 |
| Open Issues | 1,087 | 4,209 |
| Last Commit | Oct 10, 2026 | Oct 11, 2026 |
| First Released | Jun 15, 2015 | May 19, 2015 |
| Categories | ||
| Tags | — |
GitHub stars over time
GitHub stars over time
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