head to head · open source
Mattermost vs UnKey
Mattermost has 39,510 GitHub stars, 9,087 forks, 1,012 open issues and last shipped yesterday. UnKey has 5,483 stars, 636 forks, 163 open issues and last shipped yesterday. Mattermost leads on adoption by 621% (39,510 vs 5,483 stars). Mattermost is written in TypeScript under a custom or non-standard licence; UnKey is written in Go under a custom or non-standard licence. Mattermost has attracted 23% as many forks as stars, UnKey 12%. 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 | UnKey | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 5.5K |
| License | Custom / other | Custom / other |
| Written in | TypeScript | Go |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 9.1K | ⑂ 636 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mattermost if
- You weight community size — 40K 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 UnKey if
- You want the UnKey feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Go
- You evaluated both and UnKey fits your workflow better
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 →
About UnKey
Unkey The Developer Platform for Modern APIs unkey.com · Docs · Engineering · Discord What is Unkey? Unkey is the developer platform for modern APIs. We unify your infrastructure so you can ship faster: deploy APIs instantly, route traffic through global gateways, and understand usage — all in one place. Deploy — push an API to production in seconds, with zero infrastructure to manage Gateway — route, authenticate, and shape traffic through globally distributed gateways API Keys — issue, verify, and revoke keys with fast global verification Ratelimiting — globally consistent, durable ratelimiting for any…
read the full UnKey overview →
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Frequently asked questions
Is Mattermost or UnKey more popular?
Mattermost has 39,510 GitHub stars and UnKey has 5,483. Mattermost has the larger community by that measure.
Are Mattermost and UnKey free?
Neither Mattermost nor UnKey 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 UnKey?
Mattermost is written in TypeScript and UnKey in Go. 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 UnKey?
Choose Mattermost if you want the larger community (39,510 stars) or its Custom / other licence terms. Choose UnKey if its feature set, stack or Custom / other licence fits better. Both are self-hostable.