However, over time, Citrix restricted the "Free" tier, moving high-value features behind a paywall and limiting the number of hosts in a free pool. This led many users to seek alternatives that stayed true to the original open-source promise. XenServer 8.0 and Modern Entitlements
: Interestingly, XenServer 8.0 can now be used for both Citrix and non-Citrix workloads under these entitlements, making it a viable free hypervisor for enterprises already in the Citrix ecosystem. The Best Alternative: XCP-ng free xenserver
: Automatically restart VMs on a different host if a physical server fails. However, over time, Citrix restricted the "Free" tier,
Today, the story has evolved again. In 2019, Citrix transferred the core XenServer engine to the Linux Foundation, creating the (Xen Cloud Platform - next generation) project. XCP-ng is a truly open-source, fully free fork of XenServer, maintained by the community and a company called Vates. Citrix now sells a commercial product called Citrix Hypervisor , which is based on XCP-ng but with added enterprise features. The Best Alternative: XCP-ng : Automatically restart VMs
Here is everything you need to know about the current state of free XenServer, why it happened, and how you can use it today.
Ultimately, free XenServer succeeded as a disruptor but failed as a sustainable business model for a publicly traded company. Its true legacy is not in the data centers where it still runs, but in the community it spawned. It proved that open-source hypervisors could compete with proprietary giants. Today, that legacy is secured by XCP-ng and Proxmox. The idea of free, enterprise-grade virtualization did not die when Citrix pulled the plug; it was simply liberated from corporate control. And in that liberation, the original promise of free XenServer—powerful infrastructure without a license fee—has finally, ironically, come true.
This bifurcation resolves the paradox. The legacy of "Free XenServer" lives on as . Today, you can have a completely free, fully featured enterprise hypervisor with all the live migration, HA, and backup features of the golden era—without Citrix’s commercial restrictions. However, it is no longer called XenServer. The name "XenServer" now refers exclusively to Citrix’s paid offering.