Unraid is a paid NAS operating system from Lime Technology. It runs on a dedicated x86 machine and pools mixed-size drives into one parity-protected array, with Docker containers, KVM virtual machines, and a large community plugin catalog on top.
Udon is home server software for Apple Silicon Macs running macOS 26 or later. It runs alongside macOS as a background service and adds a browser dashboard for containers, file sharing, Homebrew packages, remote desktop, and an AI assistant.
The main difference between Unraid and Udon
Unraid replaces the operating system: you dedicate a PC to it, and the drive array is the heart of the system. Udon adds to the operating system: the Mac stays a Mac, and the server runs alongside whatever else the machine does.
Storage follows from that. Unraid's parity array and ZFS pools are built for boxes full of drives and survive a disk failure. Udon serves the storage the Mac already has, the internal SSD plus any external drives macOS mounts; pooled, parity-protected storage is on Udon's roadmap. For a box full of drives today, Unraid is the proven choice.
An Unraid tower earns its keep in drive bays and pays for it in watts, noise, and space. A Mac mini starts at $599, idles at a few watts in silence, and its Apple Silicon chip outruns the CPUs in most NAS builds. A tower that draws 80 watts more than a Mac mini costs roughly a hundred dollars a year in electricity.
Unraid vs Udon side by side
| Unraid | Udon | |
|---|---|---|
| Runs on | A dedicated x86 PC | An Apple Silicon Mac, macOS 26 or later |
| Operating system | Its own Linux-based OS | A daemon on top of macOS |
| Storage | Parity-protected array of mixed drives, ZFS pools | The Mac's own drives, internal and external |
| Containers | Docker | Apple Container or OrbStack (Docker-compatible) |
| Virtual machines | KVM virtual machines | Not yet; on the roadmap |
| Price | One-time licenses with a year of updates, or a lifetime tier | $29 one time per Mac, after a 14-day trial |
Pick Unraid when
- You have, or want to build, a dedicated box with many mixed-size drives.
- Parity protection or ZFS across those drives matters to you today.
- You want full virtual machines next to your containers today.
- You want the plugin depth of Community Applications.
Pick Udon when
- You already own an Apple Silicon Mac, especially one sitting mostly idle.
- Watts, noise, and desk space matter: a Mac mini idles at a few watts in silence.
- You want the machine to stay usable as a Mac while it serves.
- Containers, file sharing, and remote access cover your needs today; drive pooling can come later.
Try Udon on your Mac
The quickest comparison is Udon on your own Mac. It is free for 14 days, then $29 to own:
curl -fsSL https://udon.sh/install | bash