head to head · open source
cobalt vs SkyOffice
cobalt has 43,316 GitHub stars, 3,798 forks, 269 open issues and last shipped 6 months ago. SkyOffice has 1,293 stars, 384 forks, 22 open issues and last shipped 9 months ago. cobalt leads on adoption by 3,250% (43,316 vs 1,293 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 | ★ 43K | ★ 1.3K |
| License | AGPL-3.0 | MIT |
| Written in | Svelte | TypeScript |
| Last push | 2026-04-06 | 2025-12-20 |
| Forks | ⑂ 3.8K | ⑂ 384 |
| 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 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
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 SkyOffice
SkyOffice open source immersive virtual office. TypeScript project. MIT license. Category Business Software / Collaboration & Communication. Built with Phaser3, React, Redux, PeerJS, Colyseus. Lives in web browser ecosystem. PC browsers supported. Mobile browsers currently not supported. Homepage https://skyoffice.netlify.app/. Registry metadata lists 1292 stars, 383 forks, 22 open issues, 5 year repo age, last push 2025 12 20, blank contributor count. Project won 2021 Monte Jade Innovation Competition. Credits include LimeZu pixel artist, WBO whiteboard project, phaser3 typescript parcel template. PRs welcome.…
read the full SkyOffice overview →
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Frequently asked questions
Is cobalt or SkyOffice more popular?
cobalt has 43,316 GitHub stars and SkyOffice has 1,293. 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 (43,316 stars) or its AGPL-3.0 licence terms. Choose SkyOffice if its feature set, stack or MIT licence fits better. Both are self-hostable.