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TL;DR — Pick Proxmox VE when virtualization is the point, TrueNAS when ZFS storage and data integrity come first, and Unraid for one flexible box that mixes drive sizes and runs storage + Docker + VMs. The common “advanced” answer is Proxmox as the base with TrueNAS virtualized on top.
The first real decision in a homelab isn’t which apps to run — it’s what operating system sits under everything. Get it wrong and you fight your own foundation for years. The three names you’ll keep hearing are Proxmox VE, TrueNAS, and Unraid — and the reason people argue about them is that they’re not really the same kind of thing. One is a hypervisor, one is a NAS, and one is a deliberately flexible all-in-one.
I run Proxmox as the base of my own cluster, so I’ll be upfront about that bias — but the honest answer here is “it depends on what your lab is for,” and this guide is about matching the tool to that.
The short answer
- Pick Proxmox VE if virtualization is the point: lots of VMs and LXC containers, clustering, live migration, and you’re comfortable with a sysadmin-flavored tool.
- Pick TrueNAS if bulk storage and data integrity come first: a storage-first NAS built on ZFS, with apps and VMs as a bonus.
- Pick Unraid if you want one approachable box that does storage + Docker apps + VMs, especially with hard drives of different sizes.
- Combine them — the most common “advanced” answer is Proxmox as the base with TrueNAS (or a storage VM) virtualized on top.
At a glance
| Proxmox VE | TrueNAS | Unraid | |
|---|---|---|---|
| Primary focus | Virtualization (VMs + LXC) | Storage / NAS (ZFS) | All-in-one flexibility |
| License & cost | Free & open (Debian); paid enterprise repo/support optional | Free & open (Community Edition); paid iX appliances/support | Paid: $49 Starter / $109 Unleashed / $249 Lifetime — closed source |
| Storage model | ZFS, LVM, Ceph, or plain dir — your choice | ZFS pools (RAID-Z); storage-first | Unraid array: mix drive sizes, 1–2 parity + ZFS/cache pools |
| Mixed-size disks | ZFS wants matched disks per vdev | ZFS wants matched disks per vdev | Yes — the array's headline feature |
| Virtual machines | KVM, first-class: clusters, live migration, HA | KVM (Fangtooth), basic | KVM, GUI-driven, solid |
| Containers / apps | LXC system containers; Docker via a VM/LXC | Docker Compose apps + catalog (since 24.10) | Docker with a huge community app catalog |
| Clustering / HA | Yes — multi-node, live migration, HA | Single node (HA is enterprise) | Single node |
| Ease of use | Steeper; sysadmin-flavored | Approachable NAS UI | Easiest for mixed media + app boxes |
| Best for | Running many VMs/containers; clusters | Bulk storage + data integrity first | One box: media, apps, storage, mixed disks |
What each one actually is
Proxmox VE is a hypervisor — a Debian-based OS whose whole job is running KVM virtual machines and LXC containers from one web UI. It clusters multiple machines, does live migration and high availability, and supports ZFS and Ceph for storage. It’s free and open source; the only paid part is an optional enterprise update repo and support subscription. It is not a NAS in spirit — it can serve files, but there’s no friendly share-management UI.
TrueNAS is a NAS operating system — storage first, everything else second. It’s built on ZFS, so checksummed data integrity, snapshots, and RAID-Z are the core of the product. As of TrueNAS 25.04 “Fangtooth,” the old FreeBSD CORE and Linux SCALE editions were unified into a single Linux-based Community Edition, and the app ecosystem moved from Kubernetes to Docker Compose in the 24.10 release. It’s free and open; iXsystems sells supported appliances. (TrueNAS Fangtooth release)
Unraid is a flexible all-in-one — a paid, closed-source OS designed so one box can be a NAS, a Docker host, and a VM host at once. Its signature is the Unraid array: you can pool disks of different sizes with one or two parity drives, add a bigger disk later without rebuilding, and each disk holds whole files (so a single dead disk beyond parity only loses that disk’s contents, not the pool). It also supports ZFS and cache pools now, and has arguably the friendliest UI of the three for media/app homelabs.
The biggest real difference: the storage model
This is where the choice actually gets decided.
- ZFS (Proxmox, TrueNAS) gives you the strongest data integrity — every block is checksummed and self-heals from redundancy — plus instant snapshots and cheap replication. The trade-off: a ZFS vdev generally wants matched disks, and expanding a pool means adding a whole vdev (or, more recently, RAID-Z expansion disk-by-disk with caveats). It rewards planning the layout up front. See the Proxmox storage guide for how ZFS, LVM, and Ceph compare there.
- The Unraid array optimizes for flexibility and low power: throw in whatever disks you have, grow one at a time, and only the disks being read spin up (quieter, cheaper to run). The trade-off is that it isn’t ZFS-grade integrity on the array itself (you add a cache/ZFS pool for that), and parity rebuilds are slower than a RAID-Z resilver.
Rule of thumb: if you’re buying a matched set of drives and care most about integrity, ZFS (TrueNAS or Proxmox). If you’re pooling mismatched drives you already own and care most about flexibility and low power, Unraid.
A very common homelab pattern is Proxmox as the base, TrueNAS (or a storage VM) on top — Proxmox runs your VMs and containers, and you pass disks or an HBA through to a TrueNAS guest that owns the storage and serves shares. You get Proxmox’s virtualization and TrueNAS’s storage UI on one machine. It’s more moving parts, but it’s the “best of both” answer once you’re comfortable.
Cost & licensing
- Proxmox VE — free to download and use in full; the enterprise repo + support subscription is optional and per-node. No feature is paywalled for home use.
- TrueNAS — the Community Edition is free and fully featured; iXsystems monetizes through hardware appliances and enterprise support, not a home paywall.
- Unraid — paid, one-time-ish licensing (2026): $49 Starter (up to 6 attached devices), $109 Unleashed (unlimited devices), $249 Lifetime. Starter and Unleashed include one year of OS updates, after which a $36/year extension is optional — the OS keeps running either way; the fee only buys newer versions. Core capabilities (NAS, Docker, VMs, array, cache pools) are not split across tiers. (Unraid pricing)
For most homelabbers the cost isn’t the deciding factor — Unraid’s fee is modest and buys a genuinely nicer all-in-one experience; Proxmox and TrueNAS being free-and-open matters more if you dislike closed source or want to cluster many nodes.
Virtualization & apps
- VMs: Proxmox is the clear leader — VMs and containers are the product, with clustering, snapshots, live migration, and HA. TrueNAS and Unraid both run KVM VMs competently via their GUIs, but neither clusters or live-migrates.
- Containers/apps: Unraid’s Docker experience, with its community-templated app catalog, is the friendliest for “click to install Jellyfin/Immich/etc.” TrueNAS now uses Docker Compose apps with a curated catalog. Proxmox uses LXC system containers natively; for Docker you run it inside a VM or LXC (see Docker on Proxmox: LXC vs VM).
If your day-to-day is “spin up and tear down lots of VMs and containers,” Proxmox. If it’s “install a handful of self-hosted apps next to my files,” Unraid or TrueNAS feel more direct.
Who should pick what
- Homelab-as-virtualization-lab, or multi-node/clustering: Proxmox VE. It’s the base my own cluster runs on, and nothing else here clusters or live-migrates.
- Storage-first: a big, trustworthy pool of data (backups, media library, photos): TrueNAS. ZFS integrity + a real NAS UI, free and open.
- One friendly box for media + apps + storage, especially with mismatched drives or a tight power budget: Unraid. The array flexibility and app catalog are worth the license.
- You want it all and don’t mind complexity: Proxmox + TrueNAS virtualized on top.
Whichever you pick, the layer above it looks the same — Docker Compose stacks, a media server, monitoring, backups. The OS is just the foundation; choose it for the job the lab is actually meant to do.
Related posts:
- VM vs LXC on Proxmox — the choice you make constantly once you’re on Proxmox
- Proxmox Storage Guide: LVM, ZFS, NFS, and Ceph — the storage side in depth
- How to Actually Use a NAS with Your Homelab — wiring storage into whatever base you choose
- Docker on Proxmox: LXC vs VM — running containers on the Proxmox route
- Plex vs Jellyfin (and where Emby fits) — the media server that sits on top
- Creating Your First Proxmox LXC Container — a first build on the Proxmox base
Sources: Unraid pricing · TrueNAS Fangtooth 25.04 · Proxmox VE
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