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GraalVM vs IBM Semeru Runtime Open Edition: catalog facts
GraalVM	IBM Semeru Runtime Open Edition
Best for: Java developers building fast-starting services and small container images	Best for: Java developers wanting an OpenJ9-based OpenJDK build
Free Free to download; the source code is published in the oracle/graal repository.	Free Free to download, with optional paid enterprise support from IBM.
Windows, macOS, Linux, Command line	macOS, Command line
Native Image builds fast-starting, low-memory executables First-class support in Spring Boot, Micronaut, Helidon and Quarkus All 4 strengths for GraalVM Native Image builds fast-starting, low-memory executables First-class support in Spring Boot, Micronaut, Helidon and Quarkus Works as a drop-in JDK with existing Java tools Truffle framework for running other languages	Uses the Eclipse OpenJ9 JVM instead of HotSpot Drop-in replacement for other OpenJDK builds All 3 strengths for IBM Semeru Runtime Open Edition Uses the Eclipse OpenJ9 JVM instead of HotSpot Drop-in replacement for other OpenJDK builds Free binaries with optional commercial support
Native Image compilation is slower than a normal Java build Native executables include only reachable code, so reflection-heavy code needs configuration	Only useful to people running or developing Java software OpenJ9 tuning options differ from HotSpot
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0 with Classpath Exception	License not stated
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for GraalVM graalvm.org Catalog checked October 1, 2026	Official website Full listing and sources Sources for IBM Semeru Runtime Open Edition developer.ibm.com/languages/semeru-runtimes Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.