SDKMAN vs asdf: JVM or Polyglot Versions?
SDKMAN specializes in JVM SDKs (Java, Kotlin, Gradle, sbt); asdf manages versions across many languages via plugins.
SDKMAN focuses on the JVM world, installing and switching Java distributions, Kotlin, Scala, Gradle, Maven, and related tools with a curated catalog of vendors and versions. asdf is language-agnostic, covering JVM tools plus Node, Python, Ruby, and more through plugins and a single .tool-versions file. For a JVM-only shop SDKMAN is deep and convenient; for a polyglot repo asdf unifies everything.
| SDKMAN | asdf | |
|---|---|---|
| Focus | JVM ecosystem | Polyglot |
| Java distros | Many vendors curated | Via plugin |
| Config file | No standard file | .tool-versions |
| Coverage | JVM tools | Many languages |
| Best for | JVM-only teams | Mixed-language repos |
In CI
SDKMAN makes pinning a specific Java vendor and version easy and is well suited to JVM-only pipelines. asdf pins JVM tools alongside everything else in one .tool-versions, which is cleaner for polyglot monorepos. In CI many JVM teams just use setup-java; both tools matter more for local parity.
Speed it up
Cache the installed SDK or tool directory keyed on your version pins. Both run on CI runners; faster managed runners shorten the JDK and tool install steps.
The verdict
A JVM-centric team that wants deep, curated Java distribution choices: SDKMAN. A polyglot codebase that wants one tool and one config across all languages: asdf. They coexist fine - SDKMAN for local JVM work, asdf for whole-repo version pinning.