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September 25, 2013

Azul Systems® Releases Zulu®, an OpenJDK Build for Windows Azure, in Partnership with Microsoft Open Technologies

Microsoft Open Technologies, Inc. (MS Open Tech), and Azul Systems, Inc. (Azul), the award-winning leader in Java runtime scalability, announced today at JavaOne the availability of Zulu for Windows Azure, Azul’s new build of the community-driven open source Java™ implementation, known as OpenJDK™, for Windows Server on the Windows Azure platform. The Zulu technology preview is available immediately for free download and use under the terms of the GPLv2 open source license.

Built and distributed by Azul Systems, Zulu is a JDK (Java Development Kit), and a compliant implementation of the Java Standard Edition (SE) 7 specification.  Zulu has been verified by passing all tests in the Java SE 7 version of the OpenJDK Community TCK (Technology Compatibility Kit).

With the support of Azul Systems and MS Open Tech, customers will be assured of a high-quality foundation for their Java implementations while leveraging the latest advancements from the community in OpenJDK. The OpenJDK project is supported by a vibrant open source community, and Azul Systems is committed to updating and maintaining its OpenJDK-based offering for Windows Azure, supporting current and future versions of both Java and Windows Server. Deploying Java applications on Windows Azure will be further simplified through the existing open source MS Open Tech Windows Azure Plugin for Eclipse with Java.

Key details of Azul Zulu include:

  • Free and open source offering, based on OpenJDK
  • Compatible with Java SE 7, verified using Java SE 7 OpenJDK Community TCK
  • Integrated with MS Open Tech’s Windows Azure Plugin for Eclipse Java tooling
  • Patches and bug fixes contributed back to the OpenJDK community by Azul
  • ISV-friendly binary licensing for easy embedding with 3rd party applications
  • Availability for download and immediate use

Jean Paoli, president of MS Open Tech said, “Java developers have many development and deployment choices for their applications, and today MS Open Tech and Azul made it easier for Java developers to build and run modern applications in Microsoft’s open cloud platform.”

Scott Sellers, president and CEO of Azul Systems said, “Azul is delighted to announce that Zulu is fully tested, free, open source, and ready for the Java community to download and preview – today. We are looking forward to serving the global Java community with this important new offering for the Azure cloud.”

Zulu is available for download at Zulu Community Forums are listed on the Stack Overflow website under the tags “azure zulu” and “azul zulu”. [ed. note: there is a new Zulu support forum available on]

For more information and updates about Zulu and the MS Open Tech and Azul Systems partnership, subscribe to the MS Open Tech Blog. Customers and partners of Microsoft and Azul interested in participating in future Zulu tech previews are also invited to contact Azul at [email protected] for additional information.

Note to editors: MS Open Tech and Azul Systems first announced their partnership on July 24, 2013.

About Azul Systems
Azul Systems (Azul) is an award-winning provider of Java for the enterprise. Based in Sunnyvale, California, Azul has been delivering Java solutions for more than 10 years with deep domain knowledge in Java runtimes, elastic memory, Pauseless Garbage Collection, and runtime resource monitoring. Azul is also a member of the Executive Committee of the Java Community ProcessSM (JCP) and has licenses to the OpenJDK Community Technology Compatibility Kit (TCK). Azul’s enterprise products enable organizations to simplify their Java-based operations while achieving lower average latencies, improved scalability, greater response time consistency and dramatically improved operating costs. For additional information, visit:

Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates. All other product and service names mentioned are the trademarks of their respective companies.