Proxmox VE vs Unraid: Which One Should You Actually Run in Your Homelab?

If you've spent any time in r/homelab or r/selfhosted, you've seen the argument play out a hundred times. Someone asks what to run on their new mini PC or old desktop, and the replies split into two camps: Proxmox VE or Unraid. Both answers are right, depending on what you're actually trying to build, which is exactly why the debate never really ends.

I've run both for years, on different hardware, for different reasons. This isn't a "one is objectively better" article, because that's not how it works. It's a breakdown of what each one is actually good at, where each one will frustrate you, and how to figure out which one fits your setup instead of someone else's.

What You'll Learn

By the end of this guide you'll understand:

• What Proxmox VE and Unraid are actually designed to do, and how their core architecture differs
• How storage works on each platform, since this is where the real difference lives
• How virtualization, containers, and app support compare
• Licensing and cost differences
• How to test-drive both before committing your hardware to one
• Common mistakes people make when picking between them

What Are Proxmox VE and Unraid, Exactly?

Proxmox VE is a type-1 hypervisor built on Debian Linux. "Type-1" means it installs directly on bare metal and runs your virtual machines and containers on top of it, rather than running inside another operating system. It's built around KVM for full virtual machines and LXC for lightweight Linux containers, and it was designed from day one for people who need to run multiple isolated operating systems on one box.

Unraid started life as a NAS operating system, and that heritage still shows in everything about it. Its original claim to fame was an array design that lets you mix hard drives of completely different sizes and brands in the same pool, protected by one or two dedicated parity drives. Virtual machines and Docker containers were added later, and they're genuinely good now, but storage flexibility is still the reason most people choose Unraid in the first place.

So right away, the framing most people use is backwards. It's not "which hypervisor is better." It's "do you want a virtualization platform that also does storage, or a storage platform that also does virtualization?"

Why This Comparison Actually Matters

Picking wrong here isn't fatal, but it does cost you time. I've watched people install Unraid because a YouTuber they liked used it, then spend a weekend fighting Docker networking for a workload that would have taken ten minutes as an LXC container in Proxmox VE. I've also seen people install Proxmox VE for a simple media server box, then get stuck manually configuring ZFS pools and NFS shares for something Unraid would have handled with a few clicks.

The honest answer is that your existing drives matter more than most comparison articles admit. If you've got a drawer full of mismatched hard drives from old builds, Unraid's parity array will save you money and headaches. If you've already standardized on same-size drives, or you're buying fresh, ZFS on Proxmox VE closes most of that gap.

Storage: The Real Dividing Line

This is where the two platforms genuinely diverge, so it's worth slowing down here.

Unraid's classic array uses one or two parity drives to protect data spread across drives of any size. Reads only touch the disk holding the file you want, which keeps things quiet and power-efficient for a media library that's mostly sitting idle. The tradeoff is write performance — writes have to update the parity drive too, unless you're using the cache pool, which softens that hit with SSDs sitting in front of the array.

Unraid also supports real ZFS pools now (that arrived in Unraid 6.12 and it's matured since), so you're not locked into the parity array if you want traditional RAID-style redundancy instead.

Proxmox VE doesn't have its own storage array concept — it uses whatever Linux supports. That usually means ZFS, a copy-on-write filesystem that checksums every block it writes and can automatically catch and, with redundancy, repair silent data corruption. ZFS also gives you snapshots, compression, and pooled storage across multiple disks, but every disk in a ZFS pool typically needs to be a similar size to use the space efficiently, and losing the wrong drive in some pool layouts is unforgiving.

Virtual Machines and Containers

Proxmox VE wins this one without much argument. It runs full KVM virtual machines for any guest OS — Windows, Linux, BSD, even nested Proxmox VE instances for testing — plus LXC containers, which share the host kernel and start in a couple of seconds instead of the thirty-plus a full VM needs. If your plan involves running more than two or three VMs, or you want proper live migration between physical hosts down the road, Proxmox VE's tooling is built for exactly that.

Unraid can run VMs too, through libvirt and KVM under the hood, and for one or two VMs — a Windows gaming VM with GPU passthrough is the classic Unraid use case — it works well. It just wasn't designed around running dozens of guests or clustering multiple physical hosts together, and it shows once you push past a handful of VMs.

Docker and Apps

This is Unraid's home turf. Its Community Applications plugin is a curated app store — search for Plex, click install, fill in a few fields, done. Proxmox VE has nothing built-in that compares. You can absolutely run Docker on Proxmox VE, usually inside an LXC container or a small VM, but you're managing docker-compose files or a tool like Portainer yourself. Proxmox VE's own Community Scripts project has closed some of that gap for LXC-based app installs, but it's still not as polished as Unraid's app catalog for someone who just wants Plex running in five minutes.

Prerequisites

Before you try either platform, get these sorted:

• A machine with at least 8 GB of RAM and a CPU that supports virtualization (Intel VT-x or AMD-V) — check this in your BIOS/UEFI settings if VMs refuse to start later
• A USB flash drive, at least 8 GB, for the installer (Unraid actually boots from this drive permanently, so keep that in mind)
• Your storage drives — note down their sizes, since this affects which platform gets you more usable space
• A wired network connection during setup; Wi-Fi support on both platforms is inconsistent enough that it's not worth fighting on day one
• A second device (laptop or phone) to read instructions from while you're at the console

How to Try Both Before You Commit

You don't have to pick blind. Here's a practical way to test both without wiping anything permanently.

1. Download the Proxmox VE ISO from the official Proxmox downloads page, and write it to a USB drive with a tool like balenaEtcher or Rufus.
2. Boot from that USB drive and run the graphical installer. You'll pick a target disk, a filesystem (ext4 is the simple default, ZFS if you want snapshots and pooled redundancy), a timezone, and a root password.
3. Log in to the web interface once it reboots, at https://your-server-ip:8006. Accept the self-signed certificate warning — that's normal on a fresh install.
4. Create one test VM and one LXC container to get a feel for the workflow. Notice how fast the LXC container boots compared to the VM.
5. Separately, grab the Unraid trial from unraid.net. Unlike Proxmox VE, the Unraid installer writes the OS directly onto a USB stick using their USB Creator tool — you don't install it to your main drive at all.
6. Boot the Unraid USB and it'll come up with a web GUI reachable from any browser on your network. Assign your data drives and a parity drive, then browse the Community Applications tab to see how the app catalog feels.
7. Run both for a week if you can, ideally on separate hardware or in a VM, before you commit your actual drives to one platform's storage format.

That last point matters more than people expect. Migrating data off a ZFS pool onto an Unraid array, or the other way around, means copying everything to external storage first. There's no in-place conversion.

Commands Explained

A few commands are worth knowing once you've settled on Proxmox VE, since you'll use them constantly from the shell or SSH:

• pveversion -v — prints the exact Proxmox VE version and the versions of every underlying package (kernel, QEMU, LXC). Useful when you're troubleshooting and need to know exactly what you're running.
• qm list — lists every virtual machine on the node, its ID, name, status, memory, and disk size. Quicker than clicking through the web UI when you just need a status check.
• pct list — the same idea, but for LXC containers.
• zpool status — shows the health of any ZFS pools on the system, including whether a drive has dropped out or a resilver is in progress. If you went with ZFS storage, check this after any drive swap.
• df -h — standard Linux disk usage, handy for confirming how much space is actually free on a given storage target.

Unraid deliberately keeps most administration in its web GUI rather than the shell, so there isn't an equivalent command set most users will touch — that's part of its appeal if you'd rather not live in a terminal.

Common Errors

A few issues come up often enough during this decision process that they're worth calling out ahead of time.

"No valid subscription" pop-up in Proxmox VE. This shows up the first time you log into the web UI on the free, no-subscription repository. It's just a reminder, not a functional limitation — every feature works fine without a paid subscription.

VMs won't start, with an error mentioning KVM. Almost always means virtualization isn't enabled in the BIOS/UEFI. Reboot, go into firmware settings, and turn on Intel VT-x or AMD-V (sometimes labeled AMD-SVM).

Unraid array won't start after adding a new disk. New disks need to be formatted before they join the array, and Unraid deliberately won't do that automatically — you have to confirm it in the GUI. Skipping that step is the single most common "why won't my array start" question in the Unraid forums.

Mismatched drive added to a ZFS pool and it won't accept it. ZFS pools generally want matching (or larger) drive sizes per vdev. If you're trying to add a smaller or oddly-sized drive to an existing pool, that's exactly the scenario Unraid's array was built to handle instead.

Troubleshooting

If a test install of either platform isn't behaving, work through this order before assuming something's broken:

• Confirm the USB drive was actually written correctly — a corrupted flash job is behind more failed boots than actual hardware problems. Re-flash it and try again.
• Check that Secure Boot is disabled in your BIOS. Both platforms can run with it enabled in recent versions, but if you hit boot loops on unfamiliar hardware, disabling Secure Boot is the fastest way to rule it out.
• For Proxmox VE, if the web interface won't load after install, try accessing it by IP address directly rather than a hostname, and double-check you're using https://, not http:// — port 8006 only speaks TLS.
• For Unraid, if Community Applications isn't showing any apps, check that the server actually has outbound internet access — the app store pulls its catalog live and fails silently on a network with no DNS.
• If performance feels off during your trial week, check whether you're accidentally testing inside a VM instead of on bare metal. Nested virtualization adds overhead that will skew your impression of either platform.

Best Practices

A few things I'd tell anyone before they lock in a decision:

• Don't decide based on a single YouTube video. Both platforms have loud, opinionated communities, and a lot of "X is better" content is really just "X is what I learned first."
• Match the platform to your drives, not the other way around. If you already own five different-sized hard drives, that fact alone should weigh heavily toward Unraid's array.
• If clustering, live migration, or running more than a handful of VMs is even a maybe for your future, start with Proxmox VE. Migrating a growing VM fleet off Unraid later is more work than starting on the platform built for it.
• Keep at least one full backup off the box entirely, regardless of which platform you pick. Proxmox Backup Server and Unraid's own backup plugins both handle this, but a local-only backup on the same hardware as your data isn't really a backup.
• You genuinely can run both. A lot of homelab setups run Unraid as a VM guest inside Proxmox VE, using PCIe passthrough to hand the physical disk controller straight to the Unraid VM. It's not a beginner-day-one project, but it's a real option once you've got some hours in on Proxmox VE.

Frequently Asked Questions

Can I run Docker containers on Proxmox VE?

Yes, but not natively through the web UI. Most people run Docker inside an LXC container or a small Debian/Ubuntu VM on Proxmox VE, then manage it with docker-compose or Portainer.

Is Unraid free?

No. Unraid requires a paid license tied to your USB boot drive, though it offers a free trial period so you can test it before buying. Proxmox VE is free and open source with no feature limits regardless of subscription status.

Which one is better for a Plex server?

For a single-purpose media box with mismatched drives, most people find Unraid faster to get running thanks to the app store and flexible array. If you're also planning to run several VMs or containers beyond just media, Proxmox VE scales better.

Can I switch from Unraid to Proxmox VE later without losing data?

Not in place. You'll need to copy your data to external storage, reformat the drives under Proxmox VE's storage model, then copy everything back. Plan for that downtime if you switch.

Does Proxmox VE support GPU passthrough like Unraid does?

Yes, and it's a mature, well-documented feature on Proxmox VE — arguably more flexible, since you can pass a GPU to either a full VM or, with more setup, an LXC container.

Wrapping Up

Neither platform is a wrong choice, and that's genuinely the honest takeaway here — not a cop-out. Proxmox VE is the stronger foundation if virtualization is the main job and storage is secondary. Unraid is the stronger foundation if flexible, mixed-drive storage and one-click apps are the main job and VMs are a nice extra.

If you're still unsure after reading this, that trial-week approach from earlier in the guide is worth the time investment. An hour spent clicking around both web interfaces on spare hardware will tell you more than any comparison article, including this one.