Proxmox VE vs UTM

Proxmox VE is an open-source, self-hosted server virtualization platform that manages KVM virtual machines and Linux Containers from an integrated web interface. A bare-metal installation includes a 64-bit Debian GNU/Linux operating system with a Proxmox kernel; installation uses the selected server and removes existing data on selected disks. Administrators can also manage the system through a command-line interface and REST API. The cluster stack supports multi-node management from any node, with high availability monitoring and automatic action when a VM or container fails. Running VMs can migrate between cluster nodes without noticeable end-user downtime. Storage options include NFS, SMB/CIFS, iSCSI, Ceph, GlusterFS, LVM, ZFS and directory storage. Proxmox Backup Server integration provides incremental encrypted backups, live restore and single-file recovery. The software is free to download under GNU AGPLv3. Paid subscriptions are per occupied physical CPU socket; each cluster server needs coverage at the same subscription level. The maker is Proxmox Server Solutions GmbH, founded in 2005 and headquartered in Vienna, Austria.

UTM is a system emulator and virtual-machine host for macOS and iOS that can run Windows, Linux, and other operating systems. Its QEMU backend supports more than 30 processor types, including x86_64, ARM64, ARM32, MIPS, PPC, and RISC-V. On Apple Silicon, UTM uses Apple’s Hypervisor framework for ARM64 systems; Intel Macs can virtualize x86/x64, while Apple Silicon can emulate those architectures at lower performance. Apple Virtualization is also available for macOS and Linux on Apple Silicon. Virtual machines can run with a graphical display, terminal console, or headless, and support snapshots, nested virtualization, and multiple displays. The Mac app supports USB devices, bridged or shared networking, and external-drive storage; iOS supports shared directories, clipboard sharing, and port forwarding. macOS guests are limited to ARM-based Macs running macOS Monterey or later. Windows GPU acceleration is unavailable, and Linux hardware OpenGL acceleration is experimental. The GitHub version is free; the Mac App Store version costs 9.99 USD once and adds automatic updates.