Proxmox

Proxmox provides an open-source server virtualization management platform built on the KVM hypervisor and LXC container technology. Proxmox VE (Virtual Environment) offers a comprehensive solution for managing virtual machines, containers, software-defined storage, and networking from a single web-based interface. The platform has gained significant popularity as an alternative to proprietary virtualization solutions, particularly following VMware's acquisition by Broadcom and subsequent licensing changes. Proxmox VE is free to use, with optional enterprise support subscriptions available. Proxmox also offers Proxmox Backup Server for efficient VM and container backups with deduplication and encryption, and Proxmox Mail Gateway for email security. The platform supports clustering, live migration, and high availability configurations.