FreeBSD vs NixOS: What are the differences?
FreeBSD: An operating system used to power modern servers, desktops, and embedded platforms. An operating system for a variety of platforms which focuses on features, speed, and stability. It is derived from BSD, the version of UNIX® developed at the University of California, Berkeley. It is developed and maintained by a large community; NixOS: A Linux distribution built on top of the Nix package manager. It is a Linux distribution with a unique approach to package and configuration management. Built on top of the Nix package manager, it is completely declarative, makes upgrading systems reliable, and has many other advantages.
FreeBSD and NixOS can be categorized as "Operating Systems" tools.
FreeBSD is an open source tool with 4.42K GitHub stars and 1.74K GitHub forks. Here's a link to FreeBSD's open source repository on GitHub.
Zscaler, Zetaops, and iwantmyname are some of the popular companies that use FreeBSD, whereas NixOS is used by Grafted-In, Chill Code, and Takt. FreeBSD has a broader approval, being mentioned in 15 company stacks & 36 developers stacks; compared to NixOS, which is listed in 6 company stacks and 5 developer stacks.