# com-lihaoyi/mill

A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-7x faster dev workflows than other JVM build tools

Repository: https://github.com/com-lihaoyi/mill
Canonical: https://ross.abutalabs.com/products/mill
Homepage: https://mill-build.org/
Language: Scala
License: MIT
License Family: permissive
Topics: scala, build-tool, build-system, java, scala-js, scala-native, android, kotlin, groovy, mill-plugin
Last push: 2026-08-24T13:58:26+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 3242, "days_push": 9, "days_rel": 26, "gap_med": 14, "n_releases_24m": 34}
- flags: no_readme
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2783, forks 444 (observed 2026-08-28T04:07:21.825444+00:00)

## What it is
Mill is a JVM build tool for Java, Scala, and Kotlin, designed to be simpler than Maven and easier than Gradle. It offers 3-7x faster development workflows than other JVM build tools.

## Use cases
- build a scala project
- build java projects without maven complexity
- faster jvm build tool than gradle
- build kotlin applications
- cross-compile scala to javascript with scala-js
- build scala native binaries
- build android apps from the jvm
- extend the build system with custom plugins

## When to choose
- you want a simpler alternative to Maven or Gradle for JVM projects
- you need faster incremental builds and dev workflows on the JVM
- you work with Scala, Scala.js, Scala Native, Java, or Kotlin
- you prefer programmable, type-safe build definitions

## When to avoid
- your project depends on a mature Maven/Gradle plugin ecosystem you cannot replace
- your team already has deep Gradle or Maven expertise and tooling
- you need a build tool outside the JVM ecosystem

## Facets
- artifact type: cli-tool
- maturity: active
- function: build-tool, developer-tools, cli
- domain: developer-tools, programming-languages
- platform: jvm, cross-platform, cli
- tags: scala, java, kotlin, build-system, scala-js, scala-native, android, mill-plugin, jvm

## Member repositories
- com-lihaoyi/mill (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:21.825444+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T08:16:03.713209+00:00, confidence not recorded.
  - homepage: https://mill-build.org/ (fetched 2026-08-29T09:55:15.844281+00:00, sha 339e28bda66e)
- Data as of 2026-08-30T08:39:29.467469+00:00.