head to head · open source
cobalt vs hopp
cobalt has 43,316 GitHub stars, 3,798 forks, 269 open issues and last shipped 6 months ago. hopp has 686 stars, 51 forks, 47 open issues and last shipped 2 days ago. cobalt leads on adoption by 6,214% (43,316 vs 686 stars). cobalt is written in Svelte under AGPL-3.0; hopp is written in Rust under AGPL-3.0. cobalt has attracted 9% as many forks as stars, hopp 7%. hopp 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.
← all 8884 open source comparisons
Side by side
| cobalt | hopp | |
|---|---|---|
| GitHub stars | ★ 43K | ★ 686 |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | Svelte | Rust |
| Last push | 2026-04-06 | 2026-09-16 |
| Forks | ⑂ 3.8K | ⑂ 51 |
| 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 hopp if
- You want the hopp feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Rust
- You evaluated both and hopp 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 hopp
Hopp is an open source, self hostable screen sharing and remote pair programming desktop app for developers and small engineering teams that want sub 100ms latency without depending on a proprietary SaaS backend.
More in Business Software
Related comparisons
More Collaboration & Communication projects
Compare either of these against the rest of the Collaboration & Communication field.
Frequently asked questions
Is cobalt or hopp more popular?
cobalt has 43,316 GitHub stars and hopp has 686. cobalt has the larger community by that measure.
Are cobalt and hopp free?
Both are open source. cobalt is licensed under AGPL-3.0 and hopp under AGPL-3.0. Neither carries a licence fee.
What is the difference between cobalt and hopp?
cobalt is written in Svelte and hopp in Rust. 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 hopp?
Choose cobalt if you want the larger community (43,316 stars) or its AGPL-3.0 licence terms. Choose hopp if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.