head to head · open source
cap vs parlant
cap has 22,381 GitHub stars, 1,918 forks, 339 open issues and last shipped yesterday. parlant has 18,290 stars, 1,555 forks, 41 open issues and last shipped 2 months ago. cap leads on adoption by 22% (22,381 vs 18,290 stars). cap is written in Rust under a custom or non-standard licence; parlant is written in Python under Apache-2.0. cap has attracted 9% as many forks as stars, parlant 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
| cap | parlant | |
|---|---|---|
| GitHub stars | ★ 22K | ★ 18K |
| License | Custom / other | Apache-2.0 |
| Written in | Rust | Python |
| Last push | 2026-09-17 | 2026-07-12 |
| Forks | ⑂ 1.9K | ⑂ 1.6K |
| 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 parlant if
- You want the parlant feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and parlant 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 parlant
Parlant is a Python project licensed under Apache 2.0, and it presents itself as an interaction control harness for customer facing AI agents. It lives in the open source large language model ecosystem, with topic tags for ai agents, llm, openai, gemini, llama3, genai, python, customer service, customer success, and ai alignment. The README describes a server based Python SDK for creating agents, observations, and guidelines.
read the full parlant overview →
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Frequently asked questions
Is cap or parlant more popular?
cap has 22,381 GitHub stars and parlant has 18,290. cap has the larger community by that measure.
Are cap and parlant free?
Both are open source. cap has no licence declared in this registry, and parlant is licensed under Apache-2.0. Both are free to self-host.
What is the difference between cap and parlant?
cap is written in Rust and parlant in Python. 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 parlant?
Choose cap if you want the larger community (22,381 stars) or its Custom / other licence terms. Choose parlant if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.