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Amazon Corretto vs IBM Semeru Runtime Open Edition: catalog facts
Amazon Corretto	IBM Semeru Runtime Open Edition
Free Free, including long-term support.	Free Free to download, with optional paid enterprise support from IBM.
Windows, macOS, Linux	macOS, Command line
Free long-term support from Amazon Certified Java SE compatible	Uses the Eclipse OpenJ9 JVM instead of HotSpot Drop-in replacement for other OpenJDK builds
A JDK only; IDEs and build tools are separate Direction is set by Amazon rather than a community foundation	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
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.