Mattermost vs Zulip
Both Mattermost and Zulip are self-hosted alternatives to Discord, Google Chat and Slack. Both are filed under Communication - Custom Communication Systems.
Side by side
| Field | Mattermost | Zulip |
|---|---|---|
| Description | Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab. | Powerful group chat application. |
| GitHub stars | 39,499 | 26,154 |
| License | ⊘ Proprietary | Apache-2.0 |
| Platforms | Go, Docker, K8S | Python |
| Latest release | v11.7.15-rc1, 28 October 2026 | 13.0-rc1, 30 October 2026 |
| Repository activity | 2 November 2026 | 1 November 2026 |
| Health | Active | Active |
| Categories | Communication - Custom Communication Systems | Communication - Custom Communication Systems |
| Website | https://mattermost.com/ | https://zulip.org |
| Source code | https://github.com/mattermost/mattermost | https://github.com/zulip/zulip |
Where the records differ
Computed from the two records above: a line appears only where the dataset states a figure, a date or a set relation, and no line recommends one application over the other.
- Mattermost has more GitHub stars in the dataset, 39,499 against 26,154.
- Mattermost recorded repository activity more recently, 2 November 2026 against 1 November 2026.
- Zulip has the newer release on record: 13.0-rc1, 30 October 2026, against v11.7.15-rc1, 28 October 2026.
- Licenses differ: Mattermost is listed under ⊘ Proprietary; Zulip under Apache-2.0.
- Platforms differ: Mattermost lists Go, Docker, K8S; Zulip lists Python.
- Both are filed under the same categories: Communication - Custom Communication Systems.