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Gradle vs Mill: catalog facts
Gradle	Mill
Free The build tool is free and open source; an optional paid Security Subscription adds…	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Windows, Command line
Build scripts in Kotlin or Groovy DSLs Build caching and parallel execution for faster incremental builds	Targets Java and Scala builds Command-line tool installable through Scoop
Build logic can become complex on large projects Extended security maintenance beyond end of life requires a paid subscription	Focused on JVM languages rather than general-purpose builds Another build tool for a team to learn alongside existing ones
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: MIT
No account needed	No account 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 October 2, 2026

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