As we begin the new year, it's a great time to reflect on what the Adoptium community accomplished in 2025. From ongoing releases and a redesigned website to the growing success of the Eclipse Temurin, 2025 was a year of growth, stability, and renewed commitment to delivering high-quality, open source Java runtimes to the world.
Temurin momentum: Approaching 1 billion downloads
Adoptium’s Eclipse Temurin continued to see strong global adoption last year. With over 800 million cumulative downloads, Temurin is rapidly approaching 1 billion lifetime downloads, a milestone that highlights the trust and confidence developers place in its quality and reliability.
Temurin’s popularity is driven by its consistent quality, timely updates, and the trust earned through Adoptium’s rigorous AQAvit test suite. Enterprises, developers, and platforms around the globe rely on Temurin to deliver secure and performant Java applications.
A full year of Temurin releases and Adoptium’s projects updates
The Adoptium community successfully delivered multiple releases throughout 2025, including the long-term support (LTS) release of JDK 25 under the celebration of 30 years of Java, support for JDK 24 that enabled JEP 493, and quarterly updates across supported versions in January, April, July, and October.
The community also implemented advancements in the rigorous AQAvit test suite, further strengthening the quality and security assurance process for all Eclipse Temurin releases
The community also announced that support for Solaris and Win32 platforms will be retired in 2026, ensuring continued focus on widely used, modern platforms.
Launch of the Temurin Sustainer Program
In 2025, the Adoptium Working Group launched the Eclipse Temurin Sustainer Program, designed to support the long-term sustainability of open source Java runtimes. This initiative provides a way for individuals and organisations of all sizes to contribute financially and ensure the continued availability of high-quality, free-to-use Temurin binaries. Whether you're supporting the technologies your business depends on or giving back to the tools that make your work possible, your contributions ensure the continued success and resilience of open source Java runtimes.
To further highlight why sustainability matters, we also shared Keeping Temurin Strong, a community session featuring Shelley Lambert, Senior Principal Software Engineer at IBM and an Eclipse Adoptium PMC member and Committer. From a committer’s perspective, Shelley explains what it takes to maintain Eclipse Temurin at scale, from ensuring reproducible builds and meeting compliance requirements to continuously improving automation and quality processes. Her perspective reinforces a core message from 2025: Temurin’s reliability and trust are the result of sustained, collaborative effort, and the Temurin Sustainer Program plays a critical role in ensuring this work can continue long term.
A new look for adoptium.net
Adoptium launched a completely redesigned website in May 2025, featuring clearer navigation, improved accessibility, and updated community resources. Notable additions include:
- A new sustainers page
- A refreshed members page
These changes reflect the project's evolution and make it easier for users, contributors, and potential members to find what they need.
This was a major undertaking, and we want to extend our thanks to all the community members: George Adams, Xavier, Jessie and the Adoptum Marketing Subcommittee members who contributed, whose work made this milestone possible. Your efforts brought a fresh look, streamlined navigation, and a foundation we continue to build on with ongoing improvements.
Highlighting real‑world impact: Bloomberg Temurin case study
This year, we published a featured case study with Bloomberg, illustrating how the company has strengthened its technology infrastructure by adopting Eclipse Temurin and engaging with the Adoptium Working Group. The case study explores how Bloomberg standardised its Java runtime strategy to support thousands of engineers and mission‑critical applications, and why Temurin’s secure software supply chain and transparent Software Bill of Materials (SBOM) are important to its global operations. It also reflects on how using Temurin and participating in the Adoptium community has helped Bloomberg reduce risk, lower costs, maintain reliability, and innovate with confidence across its platforms.
Read my full blog to learn more and download the full case study here.
Community events and global presence
Adoptium continued to grow its community through both virtual and in-person engagements:
- Adoptium Summit 2025 featured eight sessions with speakers from seven countries, attracting increased registrations, higher satisfaction scores (94 percent), and over 500,000 YouTube views.
- The team presented talks or hosted booths at in-person events, including FOSDEM, DevNexus, Javaland, JCon Europe, OSCAFest, FOSS Backstage, CommitConf, SFSCon, Nerdearla, WeAreDevelopers, DevFest Vienna and Open Source Experience Paris
These events played a key role in growing awareness and community collaboration around Adoptium and Temurin.
Looking ahead to 2026 and beyond
As we look forward, the Adoptium Working Group remains committed to delivering secure, high-quality Java runtimes and building an even more inclusive and engaged community. But sustaining this work requires continued investment and support, from both new contributors and sponsors.
To help:
- Consider joining as a Temurin Sustainer
- Contribute to the release effort or test automation
- Join the community on Slack
Together, we can ensure a vibrant and sustainable future for open source Java runtimes.
