head to head · open source
Mattermost vs Stoat
Mattermost has 39,112 GitHub stars, 9,005 forks, 1,012 open issues and last shipped yesterday. Stoat has 3,336 stars, 388 forks, 139 open issues and last shipped today. Mattermost leads on adoption by 1,072% (39,112 vs 3,336 stars). Mattermost is written in TypeScript under a custom or non-standard licence; Stoat is written in Rust under a custom or non-standard licence. Mattermost has attracted 23% as many forks as stars, Stoat 12%. Stoat 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 | Stoat | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 3.3K |
| License | Custom / other | Custom / other |
| Written in | TypeScript | Rust |
| Last push | 2026-09-19 | 2026-09-20 |
| Forks | ⑂ 9.0K | ⑂ 388 |
| 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 Stoat if
- You want the Stoat feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Rust
- You evaluated both and Stoat 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 Stoat
Stoat is a Rust backend project that provides the services and libraries powering the Stoat group chat service. The repository is organized around core crates for configuration, database implementation, files, API models, permissions, presence, result types, and a coalesced crate.
read the full Stoat overview →
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Frequently asked questions
Is Mattermost or Stoat more popular?
Mattermost has 39,112 GitHub stars and Stoat has 3,336. Mattermost has the larger community by that measure.
Are Mattermost and Stoat free?
Neither Mattermost nor Stoat declares a licence in this registry, so check each project's own repository before relying on either for a commercial use. Both are free to self-host.
What is the difference between Mattermost and Stoat?
Mattermost is written in TypeScript and Stoat in Rust. 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 Stoat?
Choose Mattermost if you want the larger community (39,112 stars) or its Custom / other licence terms. Choose Stoat if its feature set, stack or Custom / other licence fits better. Both are self-hostable.