Axon Framework 4 (AF4) reached end of support on June 30, 2026. Nothing broke, but nothing gets fixed upstream anymore either. LTS restarts security patching, bug fixes, and ecosystem compatibility for the version you already run, handled by the team that built it.
License
Axon Framework is Apache 2.0. No change
Track record
90M+ downloads, in production since 2009
What actually changed with Axon Framework 4 on
June 30, 2026
Decide what's best for your organization, based on the facts.
🤚🏼
What ended for AF4
Security patches
New CVEs affecting AF4 will not be fixed by the maintainers.
Bug fixes
Defects found in AF4 won't be corrected upstream.
Maintenance releases
No further AF4 point releases or dependency bumps.
Ecosystem upkeep
As Spring and other libraries evolve, keeping AF4 compatible is now on your team, not the maintainers.
🥳
What did not change
The code is still yours
Axon Framework stays open source under Apache 2.0. Nothing was revoked or discontinued.
Your systems keep running
AF4 doesn't stop working; it stops being maintained.
Your options stay open
Your systems keep running. Your exposure doesn't. Every day without LTS, your team owns triage for CVEs we've stopped patching.
Commercial support is available, not required
LTS is one path. The point is that it's your decision.
Axon Framework 4 doesn't wear out, but the software world around it is changing
Unlike hardware, a framework doesn't degrade with use. What changes is everything it depends on; Spring, the JDK, transitive libraries, the CVE feed. Staying on AF4 means someone has to keep it updated. When maintenance ended upstream, that someone became your team.
Maintaining it yourself
Compatibility gaps don't get fixed by junior engineers. They land on the two or three people who know your Axon internals best, the same people you'd rather have shipping features. It rarely looks like a project, it's a steady drip of dependency bumps, security triage, and "why did this break after the Spring upgrade." It's work that's invisible until it isn't, and it competes directly with your roadmap.
Time-to-market slips
As senior engineers get pulled into maintenance instead of features.
Ecosystem drift
Library updates that quietly break things and have to be chased.
Security triage
For new CVEs, now backported by hand instead of by the maintainers.
When it's over, it's over.
When the deep framework knowledge lives with certain engineers.
Compliance risk
udits for SOC 2, PCI-DSS, and more require a documented plan for software no longer receiving vendor support.
Most teams could, in principle, maintain the framework themselves. The same way most people could learn to service their own car. Almost nobody does, because the point of a car is to get somewhere quickly, and not to become a mechanic. Your engineers are most valuable working on your business, not maintaining the ecosystem underneath it.
Support from true event sourcing experts
LTS moves that upkeep to the engineers who maintain Axon Framework. New vulnerabilities get assessed and patched against the version you run; compatibility is kept current for you. Your senior engineers get their time back for the work that actually differentiates your product, and you get depth of knowledge that's hard to keep in-house when one or two people carry it.
Making the Case for Axoniq Framework
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Axon Framework 4 reached end of life on June 30, 2026. Teams still running it are operating without active maintenance, and every quarter on an unmaintained framework adds security, compliance, and hiring risk that compounds quietly until it becomes urgent.
Case study
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Read how we helped accelerate engineering velocity at a major U.S. grocery retailer, freeing the team from maintaining infrastructure so they could focus on building features.
What you're actually buying with long-term support
LTS is the maintenance and expertise that stopped upstream, put back in place by the people who build Axon Framework, for the version you already run in production.
Security patches for AF4
New vulnerabilities assessed and fixed, so you're not hand-backporting CVEs.
Ecosystem compatibility
AF4 kept in step as Spring, the JDK, and dependencies move on.
Critical bug fixes
Defects that threaten correctness or stability, fixed against the version you run.
Access to the experts
A named path to engineers who know the framework internals.
Audit-ready documentation
A documented compensating control you can hand an assessor.
Decide your migration path on your timeline
Coverage through next year, so any future change is planned, not a fire drill.
Talk to the team about AF4 LTS
Tell us where AF4 lives in your stack and we'll walk through what LTS would cover for your environment.
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