Vates VMS (Virtualization Management Stack) is an open-source virtualization platform from France. It is built around XCP-ng (a production-grade Xen-based hypervisor) and includes Xen Orchestra (a web-based VM management and native backup tool) along with additional components like XO Lite, XOSTOR, and XO Proxy. The entire stack is developed publicly and aimed at delivering enterprise-grade virtualization features without vendor lock-in. Vates offers the software for free and provides paid support subscriptions and professional services for deploying and migrating IT infrastructures.