Ubuntu Server is described as 'The leading platform for scale-out computing, Ubuntu Server helps you make the most of your infrastructure. Whether you want to deploy an OpenStack cloud, a Hadoop cluster or a 50,000-node render farm, Ubuntu Server delivers the best value scale-out performance available' and is a operating system in the os & utilities category. There are more than 100 alternatives to Ubuntu Server for a variety of platforms, including Linux, Self-Hosted, BSD, Windows and Mac apps. The best Ubuntu Server alternative is Debian, which is both free and Open Source. Other great apps like Ubuntu Server are Fedora, Tails, Zorin OS and openSUSE.
The Debian Project is an association of individuals who have made common cause to create a free operating system. This operating system that we have created is called Debian.
Fedora creates an innovative, free, and open source platform for hardware, clouds, and containers that enables software developers and community members to build tailored solutions for their users.
Tails is a Debian based live CD/USB with the goal of providing complete Internet anonymity for the user.
Linux-based OS designed for familiar user experience, mimicking Windows or macOS, supports dual-boot, runs Windows apps via WINE, pre-installed essential software, customizable desktop layouts, broad hardware compatibility, and privacy-focused updates.
openSUSE is a free and Linux-based operating system for your PC, Laptop or Server.
Manjaro is a user-friendly Linux distribution based on the independently developed Arch operating system. Within the Linux community, Arch itself is renowned for being an exceptionally fast, powerful, and lightweight distribution that provides access to the very latest cutting...
Kubuntu is an official "flavor" of Ubuntu that uses the KDE Plasma desktop environment. This gives it a completely different look and feel.
elementary OS is a free, fast and aesthetically pleasing operating system based on Ubuntu .
Versatile OS with universal app architecture, free first-year offer for Windows 7 and 8.1 users, redesigned mouse-touch UI, virtual desktop, Microsoft Edge, upgraded security, and enhanced graphics for gaming, supporting fingerprint and face recognition login.
After October 14, 2025, Windows 10 will no longer receive free software updates, technical support, or security fixes. Microsoft suggests to upgrade to 
Windows 11 : https://blogs.windows.com/windowsexperience/2024/10/31/how-to-prepare-for-windows-10-end-of-support-by-moving-to-windows-11-today/
Windows 10 is not designed to be run on a server.
not a server os and is not headless
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of...
Overall good for a ui server
Pop!_OS is an operating system for STEM and creative professionals who use their computer as a tool to discover and create. Unleash your potential on secure, reliable open source software. Based on your exceptional curiosity, we sense you have a lot of it.
NixOS is a 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...
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elementary OS is a desktop distribution, not a server distribution