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Microsoft Build of OpenJDK vs Amazon Corretto: catalog facts
Microsoft Build of OpenJDK	Amazon Corretto
Best for: Java developers who want a free, long-term supported JDK	Best for: Java developers and servers that need a supported, free JDK
Free Free of charge and open source.	Free Free, including long-term support.
Windows, macOS, Linux, Command line	Windows, macOS, Linux
Long-term supported releases at no cost Builds for macOS, Linux and Windows All 3 strengths for Microsoft Build of OpenJDK Long-term supported releases at no cost Builds for macOS, Linux and Windows Patches are upstreamed to OpenJDK by default	Free long-term support from Amazon Certified Java SE compatible All 4 strengths for Amazon Corretto Free long-term support from Amazon Certified Java SE compatible Quarterly security and performance updates Several Java versions from 8 to 27
One of many OpenJDK distributions with similar contents Support focus leans towards Microsoft's own ecosystem	A JDK only; IDEs and build tools are separate Direction is set by Amazon rather than a community foundation
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0-with-classpath-exception
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for Microsoft Build of OpenJDK microsoft.com/openjdk Catalog checked October 1, 2026	Official website Full listing and sources Sources for Amazon Corretto aws.amazon.com/corretto Catalog checked September 24, 2026

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