XenServer features by edition
Citrix XenServer is the only enterprise-class, cloud-proven virtualization platform that delivers all of the critical features needed for any server and datacenter virtualization implementation—scalability for any size business, support for Windows® and Linux OSs and complex storage needs, centralized multi-server management, live virtual machine migration, and much more. No matter where you choose to begin with XenServer, all editions are compatible and can be upgraded in place via license key, with no additional software installation or downtime required. Purchasing XenServer is simple with pricing appointed on a per server basis.
 Automated VM protection and recovery is only available for the Advanced and Enterprise editions in the 6.0 release and later.
Data protection and resiliency for enterprise-wide virtual environments
Essential integration and optimization capabilities for production deployments of virtual machines.
Key high availability and advanced management tools that take virtual infrastructure to the next level.
Proven virtualization platform that delivers uncompromised performance, scale, and flexibility at no cost.