Mattermost
Public facts onlyOpen source core, paid extras. The core is under an OSI-approved licence; some features ship in separately licensed commercial add-ons. Not fully open source. Source code · Website
Self-hosted team chat with voice calls, screen sharing and workflow automation, usable from web, desktop and mobile apps. (reviewed by BenchLytix)
Licence, summarised from its LICENSE file: Source under AGPLv3 or a commercial licence; admin tools and configuration files under Apache-2.0; compiled releases from Mattermost, Inc. are MIT. The server/enterprise/ directory is under the Mattermost Source Available License (production use needs Mattermost's terms). LICENSE file, read 2026-10-13.
Running it yourself
We have no supporting services on record from this project's setup files, so we give no hosting estimate. Check the project's own requirements. You need a server, or an IT provider who runs one for you.
What this label rests on
Licence, last update and source code, from public records. We have not run it.
Facts and where they come from
| Fact | Value | Source |
|---|---|---|
| Licence identifiers | AGPL-3.0 + Apache-2.0 + commercial add-ons | GitHub repositoryfetched 2026-10-13 |
| GitHub stars | 39,323 | GitHub repositoryfetched 2026-10-13 |
| Contributors | 1,219 | GitHub repositoryfetched 2026-10-13 |
| Last update to the code | 2026-10-13 | GitHub repositoryfetched 2026-10-13 |
| Commits by month | 2025-11: 116 · 2025-12: 87 · 2026-01: 120 · 2026-02: 133 · 2026-03: 165 · 2026-04: 199 · 2026-05: 208 · 2026-06: 190 · 2026-07: 218 · 2026-08: 170 · 2026-09: 282 · 2026-10: 54 | awesome-selfhosted listing (counted from GitHub)fetched 2026-10-13 |
| Archived | No | GitHub repositoryfetched 2026-10-13 |
| Current release | v11.7.12 (2026-10-08) | awesome-selfhosted listingfetched 2026-10-13 |
| Docker Hub image | mattermost/mattermost-team-edition: 70,627,383 pulls, updated 2026-10-08 | Docker Hubfetched 2026-10-13 |
| Platforms | Go, Docker, K8S | awesome-selfhosted listingfetched 2026-10-13 |
| Described as an alternative to | Slack | awesome-selfhosted listingfetched 2026-10-13 |
| Listing description | Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack). | awesome-selfhosted listingfetched 2026-10-13 |
| Website | https://mattermost.com/ | awesome-selfhosted listingfetched 2026-10-13 |
Not on record: Connectors in its directory, API documentation, Single sign-on documentation, External services it needs.
Licence class is derived from the licence identifiers above, never typed by hand. How
Editorial notes
- What it does
- Self-hosted team chat with voice calls, screen sharing and workflow automation, usable from web, desktop and mobile apps.
- Drafted by AI from GitHub repository, reviewed by a person on 2026-10-13
- Ops burden
- 2 of 3 (app plus a database or queue)
- Drafted by AI from GitHub repository, reviewed by a person on 2026-10-13
Editorial, not measured. Every note was reviewed by BenchLytix before this record was published.