head to head · open source
cobalt vs Mezon
cobalt has 45,722 GitHub stars, 4,031 forks, 269 open issues and last shipped 7 months ago. Mezon has 2,015 stars, 62 forks, 85 open issues and last shipped yesterday. cobalt leads on adoption by 2,169% (45,722 vs 2,015 stars). cobalt is written in Svelte under AGPL-3.0; Mezon is written in TypeScript under a licence not recorded in this registry. cobalt has attracted 9% as many forks as stars, Mezon 3%. Mezon 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
| cobalt | Mezon | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 2.0K |
| License | AGPL-3.0 | Custom / other |
| Written in | Svelte | TypeScript |
| Last push | 2026-04-06 | 2026-11-02 |
| Forks | ⑂ 4.0K | ⑂ 62 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick cobalt if
- You weight community size — 46K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Svelte
- You value the larger contributor base for long-term maintenance
pick Mezon if
- You want the Mezon feature set and don't need the biggest community
- Your stack matches TypeScript
- You evaluated both and Mezon fits your workflow better
About cobalt
best way to save what you love cobalt.tools 💬 community discord server 🐦 twitter 🦋 bluesky cobalt is a media downloader that doesn't piss you off. it's friendly, efficient, and doesn't have ads, trackers, paywalls or other nonsense. paste the link, get the file, move on. that simple, just how it should be. cobalt monorepo this monorepo includes source code for api, frontend, and related packages: api tree & readme web tree & readme packages tree it also includes documentation in the docs tree: how to run a cobalt instance how to protect a cobalt instance cobalt api instance environment variables cobalt api…
read the full cobalt overview →
About Mezon
Mezon The Live, Work, and Play Platform – High performance · Lightweight · Real time. Mezon Bug Report Community Mezon Bug Report Community High performance, lightweight real time communication technology for communities. Mezon is a Live, Work, and Play platform. It’s perfect for gaming and chilling with friends, or even building a global community. Customize your own space to talk, play, and hang out. Mezon also delivers enterprise grade performance with sub millisecond response times and support for millions of concurrent connections. That performance comes from owning the hot path end to end: high performance…
read the full Mezon overview →
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Frequently asked questions
Is cobalt or Mezon more popular?
cobalt has 45,722 GitHub stars and Mezon has 2,015. cobalt has the larger community by that measure.
Are cobalt and Mezon free?
Both are open source. cobalt is licensed under AGPL-3.0, and Mezon has no licence declared in this registry. Both are free to self-host.
What is the difference between cobalt and Mezon?
cobalt is written in Svelte and Mezon 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, cobalt or Mezon?
Choose cobalt if you want the larger community (45,722 stars) or its AGPL-3.0 licence terms. Choose Mezon if its feature set, stack or Custom / other licence fits better. Both are self-hostable.