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Windmill vs Dagster: catalog facts
Windmill	Dagster
Freemium Open-source self-hosted version is free; a hosted cloud and an enterprise edition are…	Freemium The open-source core is free; Dagster+ is a paid hosted service.
Web, Self-hosted	Web, Self-hosted
Scripts become APIs, jobs and forms without boilerplate Supports TypeScript, Python, Go, Bash and 20+ other languages	Asset-based model with lineage and freshness tracking Self-hostable open-source core
Aimed at teams comfortable writing code Some features are tied to the enterprise edition	Aimed at data engineering teams, not general automation Announced merger with Prefect makes the roadmap uncertain
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.