MassOS is described as 'A free GNU/Linux operating system for x86_64 devices, which aims to be minimal and lightweight, without compromising features. It uses the Xfce desktop environment' and is a Linux Distro in the os & utilities category. There are more than 50 alternatives to MassOS for a variety of platforms, including Linux, Self-Hosted, BSD, Windows and Mac apps. The best MassOS alternative is Linux Mint, which is both free and Open Source. Other great apps like MassOS are Debian, Fedora, Arch Linux and Tails.