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Apache Airflow vs Windmill: catalog facts
Apache Airflow	Windmill
Free Free and open source, developed as an Apache Software Foundation project.	Freemium Open-source self-hosted version is free; a hosted cloud and an enterprise edition are…
Web, Self-hosted	Web, Self-hosted
Workflows are plain Python, so tasks can be generated dynamically Web UI with status and logs for every task run	Scripts become APIs, jobs and forms without boilerplate Supports TypeScript, Python, Go, Bash and 20+ other languages
Requires Python knowledge to define workflows You run and maintain the scheduler, workers and web server yourself	Aimed at teams comfortable writing code Some features are tied to the enterprise edition
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: Apache-2.0	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.