If you’re still comparing virtualization platforms, these guides are the best place to start: Proxmox vs ESXi
Proxmox vs KVM
Proxmox vs Hyper-V
XCP-ng vs Proxmox
Unraid vs Proxmox if you’re deciding between a NAS-focused OS and a hypervisor In general, I’d choose Proxmox if your main goal is virtualization. I’d choose Unraid or TrueNAS if your main goal is NAS storage, and virtualization is secondary. Proxmox can do storage, and NAS operating systems can run VMs, but picking the tool that matches your main use case usually leads to a better setup.
If you’re still deciding between platforms, start with these comparisons: pfSense vs OPNsense
pfSense vs OpenWrt
pfSense Plus vs CE My general recommendation is simple: Use pfSense if you want a mature, powerful firewall platform with tons of documentation and a long track record.
Use OPNsense if you want something similar to pfSense, but with a more modern interface and a different update/plugin approach.
Use OpenWrt if you want to replace the firmware on supported router hardware or build a lightweight router on lower-power hardware.
Use UniFi if you want the easiest full-network ecosys