head to head · open source
cobalt vs claude-share
cobalt has 45,371 GitHub stars, 4,007 forks, 269 open issues and last shipped 7 months ago. claude-share has 549 stars, 5 forks, 3 open issues and last shipped yesterday. cobalt leads on adoption by 8,164% (45,371 vs 549 stars). cobalt is written in Svelte under AGPL-3.0; claude-share is written in TypeScript under MIT. cobalt has attracted 9% as many forks as stars, claude-share 1%. claude-share 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 | claude-share | |
|---|---|---|
| GitHub stars | ★ 45K | ★ 549 |
| License | AGPL-3.0 | MIT |
| Written in | Svelte | TypeScript |
| Last push | 2026-04-06 | 2026-10-23 |
| Forks | ⑂ 4.0K | ⑂ 5 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick cobalt if
- You weight community size — 45K 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 claude-share if
- You want the claude-share feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and claude-share 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 claude-share
Shared Sessions for Claude Code Work in the same Claude session with your team. Share a link, let a teammate join from their own Claude Code, and see each other's prompts, streamed replies and tool results. The host's machine does the work. Install · Try a first session · Full guide · Contribute Watch the 90 second demo on X or download the 8 second invitation clip. The clip shows an invitation arriving in Claude Desktop. Recorded with fictional teammates; demo details and music credit. Pair on a real task. A teammate joins your ongoing session with its shared history, then asks Claude to investigate the same…
read the full claude-share overview →
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Frequently asked questions
Is cobalt or claude-share more popular?
cobalt has 45,371 GitHub stars and claude-share has 549. cobalt has the larger community by that measure.
Are cobalt and claude-share free?
Both are open source. cobalt is licensed under AGPL-3.0 and claude-share under MIT. Neither carries a licence fee.
What is the difference between cobalt and claude-share?
cobalt is written in Svelte and claude-share 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 claude-share?
Choose cobalt if you want the larger community (45,371 stars) or its AGPL-3.0 licence terms. Choose claude-share if its feature set, stack or MIT licence fits better. Both are self-hostable.