Mattermost
Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).
The license is not an approved open-source license. Read it before you rely on the app.
- GitHub stars
- 39,322
- License
- ⊘ Proprietary
- Latest release
- v11.7.12
8 October 2026 - Last commit
- 13 October 2026
- Runs on
- Go, Docker, Kubernetes
Commits per month, last 12 months
1,942 commits
Replaces
Paid products Mattermost can stand in for.
How to self-host Mattermost
Mattermost runs on Go, Docker and Kubernetes. The project's own install guide is the place to start; most people put it on a small server with Docker and a reverse proxy for HTTPS.
- Get a server: a home server, a VPS, or a managed app host.
- Install it the way the project's docs describe, usually with Docker Compose.
- Put it behind HTTPS and set up backups before you add real data.
- Update it regularly. Watch the project's releases.
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Questions
Is Mattermost free?
Mattermost's source code is available under ⊘ Proprietary, which is not an approved open-source license. It may restrict commercial use or redistribution, so read the license before you depend on it.
Can I self-host Mattermost?
Yes. Mattermost runs on Go, Docker and Kubernetes. Follow the install guide in the project's documentation, or use a host that installs it for you.
What does Mattermost replace?
People use Mattermost instead of Microsoft Teams or Slack.
Is Mattermost still maintained?
The last change to Mattermost's code was on 13 October 2026, with 1942 commits in the last 12 months.
Topics
App data from awesome-selfhosted (CC BY-SA 3.0), stars and activity from GitHub.