head to head · open source
Mattermost vs Tirreno
Mattermost has 39,093 GitHub stars, 9,000 forks, 1,012 open issues and last shipped yesterday. Tirreno has 1,513 stars, 179 forks, 9 open issues and last shipped 1 months ago. Mattermost leads on adoption by 2,484% (39,093 vs 1,513 stars). Mattermost is written in TypeScript under a custom or non-standard licence; Tirreno is written in PHP under AGPL-3.0. Mattermost has attracted 23% as many forks as stars, Tirreno 12%. Mattermost was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Mattermost | Tirreno | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 1.5K |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | PHP |
| Last push | 2026-09-17 | 2026-08-14 |
| Forks | ⑂ 9.0K | ⑂ 179 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mattermost if
- You weight community size — 39K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Tirreno if
- You want the Tirreno feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches PHP
- You evaluated both and Tirreno fits your workflow better
About Mattermost
Mattermost is an open core, self hosted collaboration platform for teams that need secure chat, workflow automation, voice calling, screen sharing, and AI integration while keeping the deployment under their own control.
read the full Mattermost overview →
About Tirreno
Tirreno is an open source security framework written in PHP and backed by PostgreSQL under AGPL 3.0. It lives in the application security and fraud prevention ecosystem, where it runs as a self hosted web application. The project describes itself as a few dependency, hand written application that can be installed quickly and used to ingest product events through API calls.
read the full Tirreno overview →
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Frequently asked questions
Is Mattermost or Tirreno more popular?
Mattermost has 39,093 GitHub stars and Tirreno has 1,513. Mattermost has the larger community by that measure.
Are Mattermost and Tirreno free?
Both are open source. Mattermost has no licence declared in this registry, and Tirreno is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Mattermost and Tirreno?
Mattermost is written in TypeScript and Tirreno in PHP. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Mattermost or Tirreno?
Choose Mattermost if you want the larger community (39,093 stars) or its Custom / other licence terms. Choose Tirreno if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.