head to head · open source
Mattermost vs Marble
Mattermost has 39,093 GitHub stars, 9,000 forks, 1,012 open issues and last shipped yesterday. Marble has 601 stars, 86 forks, 0 open issues and last shipped 11 days ago. Mattermost leads on adoption by 6,405% (39,093 vs 601 stars). Mattermost is written in TypeScript under a custom or non-standard licence; Marble is written in HTML under a custom or non-standard licence. Mattermost has attracted 23% as many forks as stars, Marble 14%. 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 | Marble | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 601 |
| License | Custom / other | Custom / other |
| Written in | TypeScript | HTML |
| Last push | 2026-09-17 | 2026-09-07 |
| Forks | ⑂ 9.0K | ⑂ 86 |
| 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 Marble if
- You want the Marble feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches HTML
- You evaluated both and Marble 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 Marble
Marble is an open source, real time decision engine for fraud detection and AML compliance that fintechs, banks and crypto exchanges self host or run as SaaS to handle transaction monitoring, screening and case investigation.
read the full Marble overview →
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Frequently asked questions
Is Mattermost or Marble more popular?
Mattermost has 39,093 GitHub stars and Marble has 601. Mattermost has the larger community by that measure.
Are Mattermost and Marble free?
Neither Mattermost nor Marble 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 Marble?
Mattermost is written in TypeScript and Marble in HTML. 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 Marble?
Choose Mattermost if you want the larger community (39,093 stars) or its Custom / other licence terms. Choose Marble if its feature set, stack or Custom / other licence fits better. Both are self-hostable.