Some alternatives:

• Incus - After canonicals takeover of LXD a fork of it called Incus was created. Supporting both virtual machines and linux containers. Free open-source with paid support.
  https://github.com/lxc/incus

• virt-manager - For home usage without clusters and the like a simple Linux host with kvm/qemu/libvirt/virt-manager usually works just fine.
  https://github.com/virt-manager/virt-manager

• Cockpit Project - Cockpit can be used to manage both virtual machines and podman. Personally I use it in tandem with virt-manager.
  https://github.com/cockpit-project/cockpit https://github.com/cockpit-project/cockpit-machines https://github.com/cockpit-project/cockpit-podman https://github.com/oVirt/cockpit-ovirt

• Proxmox - KVM/LXC Hypervisor based on Debian. Supports clustering and High-Availability. Free open-source with paid support. https://github.com/proxmox