head to head · open source
Puter vs Mattermost
Puter has 43,557 GitHub stars, 4,062 forks, 19 open issues and last shipped yesterday. Mattermost has 39,093 stars, 9,000 forks, 1,012 open issues and last shipped yesterday. Puter leads on adoption by 11% (43,557 vs 39,093 stars). Puter is written in TypeScript under AGPL-3.0; Mattermost is written in TypeScript under a custom or non-standard licence. Puter has attracted 9% as many forks as stars, Mattermost 23%. 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
| Puter | Mattermost | |
|---|---|---|
| GitHub stars | ★ 44K | ★ 39K |
| License | AGPL-3.0 | Custom / other |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 4.1K | ⑂ 9.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Puter if
- You weight community size — 44K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Mattermost if
- You want the Mattermost feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and Mattermost fits your workflow better
About Puter
Puter is an open source, self hostable internet computer that delivers a full desktop environment running directly in a web browser. It functions as a cloud based operating system, integrating file storage, applications, and developer tooling into a single cohesive platform. The project lives in the browser based desktop and cloud infrastructure ecosystem, positioning itself as a free and open alternative to proprietary cloud desktop services.
read the full Puter overview →
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 →
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Frequently asked questions
Is Puter or Mattermost more popular?
Puter has 43,557 GitHub stars and Mattermost has 39,093. Puter has the larger community by that measure.
Are Puter and Mattermost free?
Both are open source. Puter is licensed under AGPL-3.0, and Mattermost has no licence declared in this registry. Both are free to self-host.
What is the difference between Puter and Mattermost?
Puter is written in TypeScript and Mattermost in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Puter or Mattermost?
Choose Puter if you want the larger community (43,557 stars) or its AGPL-3.0 licence terms. Choose Mattermost if its feature set, stack or Custom / other licence fits better. Both are self-hostable.