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November 19, 2014

Azul Systems Releases Industry’s Only Certified Builds of OpenJDK

Azul Systems, the award-winning leader in Java runtime solutions, today announced that it has released certified binaries of Zulu®, its build of OpenJDK™, available as free downloads from the Azul website and other selected distribution points, including the Docker hub. Each binary distribution of Zulu is now accompanied with a certificate stating the date that the build passed all required tests in the Java Community Technology Compatibility Kit (TCK) and other rigorous testing necessary for commercial use.

As enterprises accelerate their adoption of open source and their use of OpenJDK, they are faced with challenges of questionable quality, version control, and security patch levels of binary builds of OpenJDK, in addition to lack of commercial support offerings for those builds.

Azul’s Zulu with certified binaries addresses these shortcomings. Zulu is a certified, multi-platform build of OpenJDK that is compliant with the Java SE 8, 7, and 6 standards. Enterprise-level support plans are available for Zulu on Windows, Linux, and the Mac, along with a 10-year lifespan for major Zulu releases.

“While the OpenJDK sources and various builds are readily available, Azul is the only company to stand behind each binary build we distribute,” said Scott Sellers, Azul Systems President and CEO. “Not knowing whether a build of OpenJDK has been properly tested and incorporates the latest bug fixes and security updates is a major problem for the Java Community.  We now certify every Zulu release, putting our stamp of approval that the required compliance and additional rigorous testing has been performed, giving users the confidence they need to use and deploy OpenJDK broadly.”

“As enterprises increasingly rely on OpenJDK in production, questions of provenance and support naturally follow,” said Stephen O’Grady, Principal Analyst at RedMonk. “The certification of OpenJDK builds by Azul provides an extra level of assurance to organizations looking to leverage the open source runtime.”

Certified builds of Zulu, Azul’s build of OpenJDK, are available as free downloads from the Azul website (, Azul’s repositories (Apt-Get and yum on, the Microsoft Azure Cloud (, and via the Docker Hub (Docker search keyword zulu-openjdk – ).

About Azul Systems
Azul Systems, the industry’s only company exclusively focused on Java and the Java Virtual Machine (JVM), builds fully supported, standards-compliant Java runtime solutions that help enable the real time business. Zing is a JVM designed for enterprise Java applications and workloads that require any combination of low latency, high transaction rates, large working memory, and/or consistent response times. Zulu is Azul’s freely available open source JVM based on OpenJDK, and Azul provides high-quality commercial support options with its Zulu Enterprise offering. For additional information, visit: