head to head · open source
Puter vs Mattermost
Puter has 44,062 GitHub stars, 4,140 forks, 19 open issues and last shipped yesterday. Mattermost has 39,510 stars, 9,087 forks, 1,012 open issues and last shipped yesterday. Puter leads on adoption by 12% (44,062 vs 39,510 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 | ★ 40K |
| License | AGPL-3.0 | Custom / other |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 4.1K | ⑂ 9.1K |
| 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
The Open Source Internet Computer! « LIVE DEMO » Puter.com · App Store · Developers · X Puter Puter is an advanced, open source, self hostable internet computer designed to be feature rich, fast, and highly extensible. For Users Puter's goal is to provide you with every app and feature you need to work, create, and play under one roof. From a simple Notepad and Voice Recorder to Spreadsheet and Camera, Puter wants to be the all in one solution for your digital life. For Developers Puter provides everything you need to build and publish web apps and games. From AI to Cloud Storage and Database to Serverless…
read the full Puter overview →
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 →
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Frequently asked questions
Is Puter or Mattermost more popular?
Puter has 44,062 GitHub stars and Mattermost has 39,510. 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 (44,062 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.