head to head · open source
cobalt vs hopp
cobalt has 45,722 GitHub stars, 4,031 forks, 269 open issues and last shipped 7 months ago. hopp has 732 stars, 60 forks, 47 open issues and last shipped 13 days ago. cobalt leads on adoption by 6,146% (45,722 vs 732 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 8%. 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.
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Side by side
| cobalt | hopp | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 732 |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | Svelte | Rust |
| Last push | 2026-04-06 | 2026-10-21 |
| Forks | ⑂ 4.0K | ⑂ 60 |
| 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 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
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 hopp
Hopp Open source screen sharing built for developers. Pair program with sub 100ms latency. The OSS Tuple alternative. Website · Download · Sign up · Docs · Self host · Discord · Twitter Hopp is an open source pair programming app and screen sharing tool built for developers. Whether you're looking for a Tuple alternative for remote pair programming, a self hosted solution for your team, or an open source Pop / Drovio / Coscreen alternative — Hopp delivers sub 100ms latency with native desktop performance. Built on Tauri and Rust, with WebRTC infrastructure powered by LiveKit. Try Hopp 1. Download the desktop app…
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Frequently asked questions
Is cobalt or hopp more popular?
cobalt has 45,722 GitHub stars and hopp has 732. 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 (45,722 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.