head to head · open source
OpenBB vs cap
OpenBB has 73,153 GitHub stars, 7,565 forks, 117 open issues and last shipped yesterday. cap has 22,381 stars, 1,918 forks, 339 open issues and last shipped yesterday. OpenBB leads on adoption by 227% (73,153 vs 22,381 stars). OpenBB is written in Python under a custom or non-standard licence; cap is written in Rust under a custom or non-standard licence. OpenBB has attracted 10% as many forks as stars, cap 9%. cap 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
| OpenBB | cap | |
|---|---|---|
| GitHub stars | ★ 73K | ★ 22K |
| License | Custom / other | Custom / other |
| Written in | Python | Rust |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 7.6K | ⑂ 1.9K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenBB if
- You weight community size — 73K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick cap if
- You want the cap feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Rust
- You evaluated both and cap fits your workflow better
About OpenBB
OpenBB is an open source data platform for investment professionals, built as the Open Data Platform (ODP) and extended by the OpenBB Workspace UI. It lives in the quantitative finance and AI agent ecosystem, integrating equity, crypto, derivatives, fixed income, economics, and options data from proprietary, licensed, and public sources.
read the full OpenBB overview →
About cap
Cap open source screen recording sharing project for teams. Lives web desktop software ecosystem. Uses Rust TypeScript stack, Next.js web dashboard, desktop apps macOS Windows. Presents alternative Loom. Supports importing existing Loom videos.
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Frequently asked questions
Is OpenBB or cap more popular?
OpenBB has 73,153 GitHub stars and cap has 22,381. OpenBB has the larger community by that measure.
Are OpenBB and cap free?
Neither OpenBB nor cap declares a licence in this registry, so check each project's own repository before relying on either for a commercial use. Both are free to self-host.
What is the difference between OpenBB and cap?
OpenBB is written in Python and cap 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, OpenBB or cap?
Choose OpenBB if you want the larger community (73,153 stars) or its Custom / other licence terms. Choose cap if its feature set, stack or Custom / other licence fits better. Both are self-hostable.