Mattermost vs Rocket.Chat
Both Mattermost and Rocket.Chat are self-hosted alternatives to Discord, Google Chat, Microsoft Teams and Slack. Both are filed under Communication - Custom Communication Systems.
Side by side
| Field | Mattermost | Rocket.Chat |
|---|---|---|
| Description | Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab. | Communications platform that puts data protection first. |
| GitHub stars | 39,499 | 46,357 |
| License | ⊘ Proprietary | MIT |
| Platforms | Go, Docker, K8S | Nodejs, Docker, K8S |
| Latest release | v11.7.15-rc1, 28 October 2026 | 9.0.0-rc.3, 31 October 2026 |
| Repository activity | 2 November 2026 | 31 October 2026 |
| Health | Active | Active |
| Categories | Communication - Custom Communication Systems | Communication - Custom Communication Systems |
| Website | https://mattermost.com/ | https://rocket.chat/ |
| Source code | https://github.com/mattermost/mattermost | https://github.com/RocketChat/Rocket.Chat |
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.
- Rocket.Chat has more GitHub stars in the dataset, 46,357 against 39,499.
- Mattermost recorded repository activity more recently, 2 November 2026 against 31 October 2026.
- Rocket.Chat has the newer release on record: 9.0.0-rc.3, 31 October 2026, against v11.7.15-rc1, 28 October 2026.
- Licenses differ: Mattermost is listed under ⊘ Proprietary; Rocket.Chat under MIT.
- Platforms differ: Mattermost lists Go, Docker, K8S; Rocket.Chat lists Nodejs, Docker, K8S.
- Both are filed under the same categories: Communication - Custom Communication Systems.