Mattermost vs Zulip
Comparing two open source alternatives to Discord and Slack. 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..
Zulip
Apache-2.0Open-source team chat with a unique topic-based threading model that makes it easy to follow multiple conversations.
Side-by-side comparison
| Mattermost | Zulip | |
|---|---|---|
| License | — | Apache-2.0 |
| Self-hostable | No | Yes |
| GitHub Stars | 39,306 | 26,027 |
| Forks | 9,043 | 10,378 |
| Open Issues | 1,087 | 2,048 |
| Last Commit | Oct 10, 2026 | Oct 9, 2026 |
| First Released | Jun 15, 2015 | Sep 25, 2015 |
| Categories | ||
| Tags | — |
GitHub stars over time
GitHub stars over time
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