head to head · open source
cap vs keploy
cap has 22,381 GitHub stars, 1,918 forks, 339 open issues and last shipped yesterday. keploy has 18,463 stars, 2,357 forks, 725 open issues and last shipped yesterday. cap leads on adoption by 21% (22,381 vs 18,463 stars). cap is written in Rust under a custom or non-standard licence; keploy is written in Go under Apache-2.0. cap has attracted 9% as many forks as stars, keploy 13%. 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
| cap | keploy | |
|---|---|---|
| GitHub stars | ★ 22K | ★ 18K |
| License | Custom / other | Apache-2.0 |
| Written in | Rust | Go |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 1.9K | ⑂ 2.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick cap if
- You weight community size — 22K 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 keploy if
- You want the keploy feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and keploy fits your workflow better
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.
About keploy
Keploy is an open source Go project in the API and integration testing ecosystem. It is a developer centric API and integration testing tool that creates safe, isolated production sandboxes for API, integration, and end to end testing. The project records API calls, database queries, and streaming events, then replays them as tests and data mocks. It captures traffic at the network layer with eBPF, so the README says it is code less and language agnostic.
read the full keploy overview →
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Frequently asked questions
Is cap or keploy more popular?
cap has 22,381 GitHub stars and keploy has 18,463. cap has the larger community by that measure.
Are cap and keploy free?
Both are open source. cap has no licence declared in this registry, and keploy is licensed under Apache-2.0. Both are free to self-host.
What is the difference between cap and keploy?
cap is written in Rust and keploy in Go. 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 keploy?
Choose cap if you want the larger community (22,381 stars) or its Custom / other licence terms. Choose keploy if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.