XCP-ng
Open-source Xen-based virtualisation platform.

About XCP-ng
XCP-ng is open source and is free to use.
People switching from Proxmox and VMware often consider XCP-ng.
XCP-ng is an alternative to
Similar to XCP-ng
- Microsoft Hyper-VVirtualisation built into Windows and Windows Server.

- Nutanix AHVHyperconverged infrastructure with its own hypervisor.

- OpenStackOpen-source cloud infrastructure software.

- Proxmox VEOpen-source virtualisation with KVM and LXC.

- Red Hat OpenShiftEnterprise Kubernetes platform.

- UnraidHome-server OS for storage, VMs and Docker.

- VirtualBoxFree, open-source desktop virtualisation.

- VMware vSphereBroadcom’s enterprise virtualisation platform.

Listed for information; LaunchStall isn’t affiliated with XCP-ng. The quoted description comes from xcp-ng.org. Features and plans change — check the official site for current details.