VirtulaBox is an open source software to run virtual systems on top of a physical system. Virtual systems are normally used for providing separate environment for each client sharing a single physical system. Developed by Oracle
License: Open Source
Citrix XenServer is a robust enterprise-grade virtualization platform that offers advanced features like high availability and live migration, making it suitable for large-scale deployments. In contrast, VirtualBox is a user-friendly, open-source solution ideal for individual users and small-scale environments, with lower resource requirements and easier setup.