head to head · open source
cobalt vs SkyOffice
cobalt has 45,722 GitHub stars, 4,031 forks, 269 open issues and last shipped 7 months ago. SkyOffice has 1,315 stars, 395 forks, 22 open issues and last shipped 11 months ago. cobalt leads on adoption by 3,377% (45,722 vs 1,315 stars). cobalt is written in Svelte under AGPL-3.0; SkyOffice is written in TypeScript under MIT. cobalt has attracted 9% as many forks as stars, SkyOffice 30%. cobalt 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 | SkyOffice | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 1.3K |
| License | AGPL-3.0 | MIT |
| Written in | Svelte | TypeScript |
| Last push | 2026-04-06 | 2025-12-20 |
| Forks | ⑂ 4.0K | ⑂ 395 |
| 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 SkyOffice if
- You want the SkyOffice feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and SkyOffice 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 SkyOffice
SkyOffice An immersive virtual office Winner of 2021 Monte Jade Innovation Competition Come try it out Official Website Why we built this Concept Video 🙌 Get latest updates? Follow our Twitter. 💕 Love this project? Consider buy me a coffee. SkyOffice works on all PC browsers (mobile browsers are currently not supported) Built with Phaser3 Game engine Colyseus WebSocket based server framework React/Redux Front end framework PeerJS WebRTC for video/screen sharing TypeScript and ES6 for both client and server sides Features Proximity Chat Flexible Screen Sharing Multifunctional Rooms Text Message Chat…
read the full SkyOffice overview →
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Frequently asked questions
Is cobalt or SkyOffice more popular?
cobalt has 45,722 GitHub stars and SkyOffice has 1,315. cobalt has the larger community by that measure.
Are cobalt and SkyOffice free?
Both are open source. cobalt is licensed under AGPL-3.0 and SkyOffice under MIT. Neither carries a licence fee.
What is the difference between cobalt and SkyOffice?
cobalt is written in Svelte and SkyOffice 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 SkyOffice?
Choose cobalt if you want the larger community (45,722 stars) or its AGPL-3.0 licence terms. Choose SkyOffice if its feature set, stack or MIT licence fits better. Both are self-hostable.