head to head · open source
Windmill vs coco
Windmill has 18,441 GitHub stars, 1,139 forks, 852 open issues and last shipped yesterday. coco has 628 stars, 14 forks, 61 open issues and last shipped yesterday. Windmill leads on adoption by 2,836% (18,441 vs 628 stars). Windmill is written in Rust under a custom or non-standard licence; coco is written in Python under Apache-2.0. Windmill has attracted 6% as many forks as stars, coco 2%. Windmill was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-agents), 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
| Windmill | coco | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 628 |
| License | Custom / other | Apache-2.0 |
| Written in | Rust | Python |
| Last push | 2026-11-06 | 2026-11-06 |
| Forks | ⑂ 1.1K | ⑂ 14 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Windmill if
- You weight community size — 18K 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 coco if
- You want the coco 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 coco fits your workflow better
About Windmill
Open source developer platform for internal code: APIs, background jobs, workflows and UIs. Self hostable alternative to Retool, Pipedream, Superblocks and a simplified Temporal with autogenerated UIs and custom UIs to trigger workflows and scripts as internal apps. Scripts are turned into sharable UIs automatically, and can be composed together into flows or used into richer apps built with low code. Supported languages: Python, TypeScript, Go, Bash, SQL, GraphQL, PowerShell, Rust, and more. Try it Website Docs Discord Hub Contributing Windmill Developer platform for APIs, background jobs, workflows and UIs…
read the full Windmill overview →
About coco
Coco Super Intelligence 495 personas across 13 departments, 229 skills [^installed] and 388 commands in the full catalog (coco 1.9.0, 2026 10 21). Agent skills, slash commands and subagents for Claude Code, Cursor, Codex and other AI coding agents. One command installs them into the tool you already use. Coco's files and state stay on your machine. Your coding agent still uses its own model provider. Open core: the core is Apache 2.0, and Super Intelligence is proprietary. Relicensed from MIT to Apache 2.0 from 2026 11 05. Earlier releases remain under MIT. Files stay on your machine. No telemetry. A version…
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Frequently asked questions
Is Windmill or coco more popular?
Windmill has 18,441 GitHub stars and coco has 628. Windmill has the larger community by that measure.
Are Windmill and coco free?
Both are open source. Windmill has no licence declared in this registry, and coco is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Windmill and coco?
Windmill is written in Rust and coco 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, Windmill or coco?
Choose Windmill if you want the larger community (18,441 stars) or its Custom / other licence terms. Choose coco if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.