OpenVZ vs Proxmox

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OpenVZ
OpenVZ is container-based virtualization for Linux. OpenVZ creates multiple secure, isolated Linux containers (otherwise known as VEs or VPSs) on a single physical server enabling better server utilization and ensuring that applications do not conflict. Each container performs and executes exactly like a stand-alone server; a container can be rebooted independently and have root access, users, IP addresses, memory, processes, files, applications, system libraries and configuration files.
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Proxmox
Proxmox Virtual Environment is a complete server virtualization management solution, based on KVM virtualization and containers. Powerful and easy to use - Complete server virtualization management with KVM and containers.