NixOS is described as 'GNU/Linux distribution that aims to improve the state of the art in system configuration management. In existing distributions, actions such as upgrades are dangerous: upgrading a package can cause other packages to break, upgrading an entire system is much less' and is a popular Linux Distro in the os & utilities category. There are more than 100 alternatives to NixOS for a variety of platforms, including Linux, Self-Hosted, Mac, BSD and Windows apps. The best NixOS alternative is Linux Mint, which is both free and Open Source. Other great apps like NixOS are Ubuntu, Debian, Arch Linux and Fedora.
Red Hat is the leader in development, deployment, and management of Linux and open source solutions for Internet infrastructure - ranging from embedded devices to secure Web servers. Red Hat was founded in 1994 by visionary entrepreneurs Bob Young and Marc Ewing.
Red Hat Enterprise Linux is the most popular commercial alternative to NixOS.
The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system. Our efforts emphasize portability, standardization, correctness, proactive security and integrated cryptography.
Ubuntu Mate is a stable, easy-to-use operating system with a configurable desktop environment. Ideal for those who want the most out of their desktops, laptops and netbooks and prefer a traditional desktop metaphor.
Solus Operating System is a Linux distribution built from scratch, exclusively for desktop systems. There is no scope-creep associated with generic platforms, and the project aims to provide a modern and focused desktop-centric solution, that is designed to keep out of the way...
A purely functional package manager and an advanced distribution of the GNU operating system developed by the GNU Project—which respects the freedom of computer users.
It has a better command line interface, and uses a more standard language than nix.
as already said is one of the few Linux distros that have similar concepts like functional package management, transitional updates, etc.
Almost everyone thinks GNU Guix is a great NixOS alternative.
Puppy Linux is a unique family of Linux distributions meant for the home-user computers. It was originally created by Barry Kauler in 2003.
Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.
Deepin is a reinterpretation to creativity and individuality. It is not only a rebirth to the system appearance, but also a brand-new upgrade to the operating experience! All of this lets deepin become the best partner of your computer.
Vanilla OS is an operating system built with simplicity in mind. It's fast, lightweight, beautiful and ready for all your daily tasks.
Garuda Linux is an appealing Arch Linux-based distribution with BTRFS (modern filesystem), Linux-zen kernel, auto snapshots, gaming edition, and many more bleeding edge features. Besides its sharp focus on performance, Garuda Linux also simplifies the user experience by...
Launched with the code-name Project Lenix, AlmaLinux OS is an open-source, community-driven project that intends to fill the gap left by the demise of the CentOS stable release. AlmaLinux OS is a 1:1 binary compatible fork of RHEL® 8 and it is built by the creators of the...
Rocky Linux is a community enterprise operating system designed to be 100% bug-for-bug compatible with America's top enterprise Linux distribution now that its downstream partner has shifted direction. It is under intensive development by the community.
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they both are the most prominent purely functional package managers.