head to head · open source
portainer vs kcl
portainer has 38,524 GitHub stars, 2,906 forks, 757 open issues and last shipped yesterday. kcl has 2,415 stars, 170 forks, 19 open issues and last shipped 4 days ago. portainer leads on adoption by 1,495% (38,524 vs 2,415 stars). portainer is written in TypeScript under Zlib; kcl is written in Rust under Apache-2.0. portainer has attracted 8% as many forks as stars, kcl 7%. portainer was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (kubernetes), 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
| portainer | kcl | |
|---|---|---|
| GitHub stars | ★ 39K | ★ 2.4K |
| License | Zlib | Apache-2.0 |
| Written in | TypeScript | Rust |
| Last push | 2026-09-18 | 2026-09-15 |
| Forks | ⑂ 2.9K | ⑂ 170 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick portainer if
- You weight community size — 39K stars and counting
- You want the Zlib license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick kcl if
- You want the kcl feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and kcl fits your workflow better
About portainer
Portainer Community Edition is a free, lightweight container management UI for Docker, Swarm, Podman, Kubernetes, and ACI environments, distributed under the zlib licence and aimed at homelab operators, hobbyists, students, and anyone experimenting with containers on their own hardware.
read the full portainer overview →
About kcl
KCL is an open source, constraint based record and functional language, hosted as a CNCF Sandbox project and licensed under Apache 2.0, for platform engineers, DevOps teams, and cloud native practitioners who need to write, validate, and manage complex configuration without hand maintaining raw YAML or JSON.
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Frequently asked questions
Is portainer or kcl more popular?
portainer has 38,524 GitHub stars and kcl has 2,415. portainer has the larger community by that measure.
Are portainer and kcl free?
Both are open source. portainer is licensed under Zlib and kcl under Apache-2.0. Neither carries a licence fee.
What is the difference between portainer and kcl?
portainer is written in TypeScript and kcl 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, portainer or kcl?
Choose portainer if you want the larger community (38,524 stars) or its Zlib licence terms. Choose kcl if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.