MOS (Modular Operating System) is described as 'MOS is a lightweight operating system based on Devuan, designed specifically for small, energy-efficient home servers' and is a operating system in the system & hardware category. There are more than 10 alternatives to MOS (Modular Operating System) for a variety of platforms, including Linux, Self-Hosted, Mac, Windows and Raspberry Pi apps. The best MOS (Modular Operating System) alternative is Proxmox Virtual Environment, which is both free and Open Source. Other great apps like MOS (Modular Operating System) are TrueNAS, openmediavault, CasaOS and Umbrel.