head to head · open source
cap vs proton-lumo
cap has 24,271 GitHub stars, 2,234 forks, 339 open issues and last shipped yesterday. proton-lumo has 5,675 stars, 741 forks, 155 open issues and last shipped yesterday. cap leads on adoption by 328% (24,271 vs 5,675 stars). cap is written in Rust under a custom or non-standard licence; proton-lumo is written in TypeScript under GPL-3.0. cap has attracted 9% as many forks as stars, proton-lumo 13%. cap was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (react), 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
| cap | proton-lumo | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 5.7K |
| License | Custom / other | GPL-3.0 |
| Written in | Rust | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 2.2K | ⑂ 741 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick cap if
- You weight community size — 24K stars and counting
- You want the Custom / other license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick proton-lumo if
- You want the proton-lumo feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and proton-lumo fits your workflow better
About cap
Cap Beautiful, shareable screen recordings. Open source, fast, and built for teams that want to own their data. Website Download Docs Pricing Discord Cap is the open source alternative to Loom. It gives you fast screen recording, polished local editing, instant share links, comments, transcripts, analytics, team workspaces, custom domains, custom S3 storage, and full self hosting when you need complete control. Use Cap for product demos, bug reports, onboarding, tutorials, design reviews, engineering walkthroughs, async standups, client updates, and any moment where showing the work is faster than scheduling…
About proton-lumo
Web clients This project is a monorepo hosting the Proton web clients. It includes the web applications, their dependencies & shared modules as well as all tooling surrounding development of the web clients (as well as some additional miscellaneous things). Proton Mail Proton Calendar Proton Drive Proton Account Proton VPN Proton Pass Proton Wallet Proton Lumo Proton Meet Technically, this monorepo is based on Yarn & Yarn Workspaces, with unified versioning for all packages inside. Getting Started Prerequisites You'll need to have the following environment to work with this project: Node.js LTS Yarn 4 git See…
read the full proton-lumo overview →
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Frequently asked questions
Is cap or proton-lumo more popular?
cap has 24,271 GitHub stars and proton-lumo has 5,675. cap has the larger community by that measure.
Are cap and proton-lumo free?
Both are open source. cap has no licence declared in this registry, and proton-lumo is licensed under GPL-3.0. Both are free to self-host.
What is the difference between cap and proton-lumo?
cap is written in Rust and proton-lumo 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, cap or proton-lumo?
Choose cap if you want the larger community (24,271 stars) or its Custom / other licence terms. Choose proton-lumo if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.