head to head · open source
cobalt vs mirotalksfu
cobalt has 43,316 GitHub stars, 3,798 forks, 269 open issues and last shipped 6 months ago. mirotalksfu has 3,103 stars, 500 forks, 0 open issues and last shipped yesterday. cobalt leads on adoption by 1,296% (43,316 vs 3,103 stars). cobalt is written in Svelte under AGPL-3.0; mirotalksfu is written in JavaScript under AGPL-3.0. cobalt has attracted 9% as many forks as stars, mirotalksfu 16%. mirotalksfu was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (collaboration), so they are genuine substitutes rather than adjacent tools.
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 | mirotalksfu | |
|---|---|---|
| GitHub stars | ★ 43K | ★ 3.1K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | Svelte | JavaScript |
| Last push | 2026-04-06 | 2026-09-17 |
| Forks | ⑂ 3.8K | ⑂ 500 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick cobalt if
- You weight community size — 43K 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 mirotalksfu if
- You want the mirotalksfu feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches JavaScript
- You evaluated both and mirotalksfu fits your workflow better
About cobalt
cobalt is a media downloader built around a single promise: paste a link, get the file, move on. It is a monorepo containing the source for an API, a web frontend, and related packages, written primarily in Svelte and TypeScript. The project lives in the modern web and JavaScript ecosystem, and its public surface is hosted at cobalt.tools, while the full codebase is published under the AGPL 3.0 license.
read the full cobalt overview →
About mirotalksfu
MiroTalk SFU is a self hosted, open source WebRTC video conferencing platform written in JavaScript and built on the Mediasoup selective forwarding unit architecture. It provides real time communication and collaboration features for rooms, screen sharing, chat, file sharing, live streaming, and recording, while allowing organizations to run the service on their own server. The project positions itself as an alternative to Zoom, Google Meet, Jitsi Meet, and Microsoft Teams.
read the full mirotalksfu overview →
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Frequently asked questions
Is cobalt or mirotalksfu more popular?
cobalt has 43,316 GitHub stars and mirotalksfu has 3,103. cobalt has the larger community by that measure.
Are cobalt and mirotalksfu free?
Both are open source. cobalt is licensed under AGPL-3.0 and mirotalksfu under AGPL-3.0. Neither carries a licence fee.
What is the difference between cobalt and mirotalksfu?
cobalt is written in Svelte and mirotalksfu in JavaScript. 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 mirotalksfu?
Choose cobalt if you want the larger community (43,316 stars) or its AGPL-3.0 licence terms. Choose mirotalksfu if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.