VirtualBox, AWS Firecracker, Unraid, VMware vSphere Hypervisor, Webmin, Microsoft Hyper-V Server, Virtualizor, OpenStack, Multipass, Paperspace, UCS Virtual Machine Manager, Archipel, vmango, SolusVM, VirtEngine, Danube Cloud, XCP-ng, oVirt, OpenNebula, Cloudmin, bhyve, VMmanager, VirtualBuddy, Fleio, OpenNode Cloud Platform, Virtkick, Kimchi, Cloudmatic, SmartOS, ZeroStack, Karesansui, AtomDeploy are some alternatives to Proxmox Virtual Environment.