compare
Kestra vs Windmill
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Kestra | Windmill |
|---|---|---|
| Language | Java | Rust |
| Licence | Apache-2.0 | Other |
| Stars | 29k | 18k |
| Latest | v2.0.5 | v1.825.0 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | about 3 days between releases | about 1 day between releases |
| Active contributors | 132+ commit authors on the default branch in the last 90 days | 9+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Apache Airflow. Alternatives to Apache Airflow →
Full replacementKestraWorkflows declared in YAML, with tasks in any language and event triggers.
PartialWindmillSchedules and runs workflows written as code.
Kestra
Windmill
- v1.825.02026-10-06choose build with AI or code when creating a raw app (#11560) (431f861)
- v1.824.12026-10-05keep monaco's diff engine out of the app shell bundle (#11542) (0908dee)
- v1.824.02026-10-05add an AI decision flow step (TypeSafe's Jev, Cloudflare's Clef) (#11474) (3cba8a7)
- v1.823.12026-10-05python results with a KeyError-raising getattr fail the job (#11517) (3fff1bd)
- v1.823.02026-10-04redesign the service logs page (#11506) (0f65df2)
Kestra
unsigned The latest release, v2.0.5, carries no signature GitHub could verify.
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Windmill
✓ signed The latest release, v1.825.0, carries a signature GitHub verified.
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