head to head · open source
Mattermost vs Tirreno
Mattermost has 39,510 GitHub stars, 9,087 forks, 1,012 open issues and last shipped yesterday. Tirreno has 1,561 stars, 185 forks, 9 open issues and last shipped 10 days ago. Mattermost leads on adoption by 2,431% (39,510 vs 1,561 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 | ★ 40K | ★ 1.6K |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | PHP |
| Last push | 2026-11-02 | 2026-10-24 |
| Forks | ⑂ 9.1K | ⑂ 185 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mattermost if
- You weight community size — 40K 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 that offers chat, workflow automation, voice calling, screen sharing, and AI integration. This repo is the primary source for core development on the Mattermost platform; it's written in Go and React, runs as a single Linux binary, and relies on PostgreSQL. A new compiled version is released under an MIT license every month on the 16th. Deploy Mattermost on premises, or try it for free in the cloud. Learn more about the following use cases with Mattermost: DevSecOps Incident Resolution IT Service Desk Other useful resources: Download and Install…
read the full Mattermost overview →
About Tirreno
tirreno tirreno is a security framework. tirreno [tir.ˈrɛ.no] helps understand, monitor, and protect your product from threats, fraud, and abuse. While classic cybersecurity focuses on infrastructure and network perimeter, most breaches occur through compromised accounts and application logic abuse that bypasses firewalls, SIEM, WAFs, and other defenses. tirreno detects threats where they actually happen: inside your product. tirreno is a hand written, few dependency, "low tech" PHP/PostgreSQL application. After a straightforward five minute installation, you can ingest events through API calls and immediately…
read the full Tirreno overview →
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Frequently asked questions
Is Mattermost or Tirreno more popular?
Mattermost has 39,510 GitHub stars and Tirreno has 1,561. 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 (39,510 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.