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Windmill vs Kestra: catalog facts
Windmill	Kestra
Freemium Open-source self-hosted version is free; a hosted cloud and an enterprise edition are…	Freemium The open-source edition is free; cloud and enterprise options are sold separately.
Web, Self-hosted	Web, Self-hosted
Scripts become APIs, jobs and forms without boilerplate Supports TypeScript, Python, Go, Bash and 20+ other languages	Declarative workflows that are easy to review and version More than 2,000 plugins
Aimed at teams comfortable writing code Some features are tied to the enterprise edition	Built for teams, heavier than a simple scheduler Some features are aimed at enterprise plans
Self-hosted, Hosted service	Self-hosted, Hosted service
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.