VMware vSphere Hypervisor is a free, bare-metal hypervisor from VMware that allows users to virtualize their servers and consolidate applications. Developed by VMware
License: Free
VMware vSphere Hypervisor is known for its robust features, scalability, and extensive support resources, making it ideal for enterprise environments. In contrast, Citrix XenServer offers a cost-effective, open-source solution that is better suited for small to medium workloads but may lack some of the advanced capabilities of VMware.