Proxmox VE

An open-source, bare-metal virtualization platform that unifies KVM hypervisors and LXC containers with integrated software-defined storage and networking.

Proxmox VE turns bare-metal x86 hardware into a powerful, enterprise-grade virtualization hub. Built on Debian GNU/Linux, it pairs KVM virtualization with lightweight LXC containers, letting you run resource-intensive virtual machines alongside high-density containerized workloads. Out of the box, you get a clean, browser-based management console to orchestrate your entire infrastructure: configure software-defined storage (like Ceph or ZFS), set up software-defined networking, and deploy high-availability clusters. It is a complete, license-free alternative to VMware ESXi, designed to scale from a single home lab server to massive, multi-node datacenters.

https://www.proxmox.com/en/proxmox-virtual-environment/overview