head to head · open source
Mattermost vs Peergos
Mattermost has 39,093 GitHub stars, 9,000 forks, 1,012 open issues and last shipped yesterday. Peergos has 2,519 stars, 199 forks, 103 open issues and last shipped yesterday. Mattermost leads on adoption by 1,452% (39,093 vs 2,519 stars). Mattermost is written in TypeScript under a custom or non-standard licence; Peergos is written in Java under AGPL-3.0. Mattermost has attracted 23% as many forks as stars, Peergos 8%. 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 | Peergos | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 2.5K |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | Java |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 9.0K | ⑂ 199 |
| 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 Peergos if
- You want the Peergos feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Java
- You evaluated both and Peergos 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 Peergos
Peergos is a peer to peer secure file storage system, social network, and application protocol built in Java under AGPL 3.0. It lives in the IPFS, IPLD, and libp2p ecosystem and supports a private web where users control their data, decide where it is stored, and determine who can see it. The project addresses centralized services that can track users, expose personal data, and observe relationships or file contents without cryptographic access control.
read the full Peergos overview →
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Frequently asked questions
Is Mattermost or Peergos more popular?
Mattermost has 39,093 GitHub stars and Peergos has 2,519. Mattermost has the larger community by that measure.
Are Mattermost and Peergos free?
Both are open source. Mattermost has no licence declared in this registry, and Peergos is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Mattermost and Peergos?
Mattermost is written in TypeScript and Peergos in Java. 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 Peergos?
Choose Mattermost if you want the larger community (39,093 stars) or its Custom / other licence terms. Choose Peergos if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.