Discourse vs Mattermost
Comparing two open source alternatives to Discord and Slack. Use the comparison below to decide which one fits your needs.
Discourse
GPL-2.0Open source community forum platform combining long-form discussion, real-time chat, and strong moderation. Self-host it or use managed hosting.
Mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Side-by-side comparison
| Discourse | Mattermost | |
|---|---|---|
| License | GPL-2.0 | — |
| Self-hostable | Yes | No |
| GitHub Stars | 47,893 | 39,166 |
| Forks | 9,017 | 9,018 |
| Open Issues | 242 | 1,014 |
| Last Commit | Sep 24, 2026 | Sep 24, 2026 |
| First Released | Jan 12, 2013 | Jun 15, 2015 |
| Categories | ||
| Tags | — |
GitHub stars over time
GitHub stars over time
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