Proxmox vs TrueNAS vs Unraid: Homelab OS Choice (2026)
Proxmox is a hypervisor, TrueNAS is a NAS OS, Unraid blends both. Pick by what you'll run most: VMs, storage, or Docker.
What does each one actually do?
The three projects solve overlapping but distinct problems. The single sentence on each:
Proxmox VE (Virtual Environment) is a Debian-based hypervisor with KVM for full virtual machines and LXC for lightweight containers. It's the homelab equivalent of VMware or Hyper-V.
TrueNAS Scale is a Debian-based NAS operating system built on the OpenZFS file system. It is primarily a storage server with strong data-integrity features (snapshots, replication, scrubbing) plus first-class Docker (now via TrueNAS Apps on K3s) and KVM virtualisation as bolt-ons.
Unraid is a commercial NAS-plus-virtualisation operating system from Lime Technology. The signature feature is its mixed-disk parity array (you can mix drive sizes and capacities, parity protects one or two failures). Docker and KVM are first-class. Licence £49 (Starter, 6 storage devices), £109 (Unleashed, unlimited), or £249 (Lifetime).
Side-by-side comparison
| Proxmox VE | TrueNAS Scale | Unraid | |
|---|---|---|---|
| Cost | Free; £80/yr Community subscription optional | Free; Enterprise subscription optional | £49 / £109 / £249 (one-off licence) |
| Primary purpose | Virtualisation (VMs + containers) | Storage (ZFS arrays + replication) | Mixed storage + Docker + VMs |
| Storage philosophy | Bring your own (ZFS / LVM / Ceph) | ZFS-first; vdev-based pools | Parity-protected mixed-disk array |
| Docker support | Via LXC or a VM (not first-class) | First-class (TrueNAS Apps via Docker) | First-class (Docker tab + Community Apps) |
| VM support | First-class (KVM) | First-class (KVM via Instances) | First-class (KVM) |
| Hardware fit | Any x86 box, 2+ cores, 8GB+ RAM | ECC RAM strongly recommended for ZFS | Any x86 box; flexible RAM |
| Learning curve | Moderate-steep | Moderate | Beginner-friendly |
| Community | Largest (Debian roots) | Strong (iXsystems-backed) | Active forum + Discord |
Which one fits which kind of homelabber?
Use this rough mapping. Most people end up with one of these patterns:
You want to run lots of VMs (Home Assistant OS, Windows 10 VM, a development Linux VM, a separate firewall VM). Pick Proxmox. Storage can be a single SSD or a small ZFS pool - the storage layer isn't the point. The hypervisor is.
You're consolidating data from multiple machines and you care most about not losing it. Pick TrueNAS Scale. ZFS snapshots, scheduled scrubs, and replication to a second pool are what you're buying. Run a few Docker apps on top, but don't expect it to be a VM workhorse.
You have a stack of mismatched second-hand drives and want one box doing everything (Plex, Home Assistant Docker, Nextcloud, a Windows VM, and the family photos). Pick Unraid. The mixed-disk parity array is the killer feature - no other OS lets you grow the array one drive at a time without re-balancing.
You want maximum flexibility and don't mind reading documentation. Pick Proxmox + a TrueNAS VM, or Proxmox + a ZFS-on-Linux pool directly. This is the "power user" stack; it's harder to set up but ends up the most capable.
What's the learning curve like for each?
All three are documented well enough that a determined beginner can stand up a working system in a weekend. The differences emerge when you push past defaults.
Unraid is the gentlest entry. The web UI hides almost all of the underlying Linux. The Community Applications plugin gives you a one-click apps catalogue (Plex, Sonarr, Home Assistant, Nextcloud, dozens of others). For someone with no Linux background, this is the only one of the three you can reasonably get running without ever touching a terminal.
TrueNAS Scale is documentation-first. The web UI walks you through pool creation, dataset hierarchy, and sharing protocols, but you need to understand ZFS concepts (vdevs, datasets, snapshots, replication) before any of it makes sense. The good news is that those concepts are standardised - what you learn applies to ZFS-on-Linux, FreeBSD, and other ZFS-based systems. Plan a week of evening reading before you commit drives.
Proxmox VE sits in the middle. The basics (create a VM, attach an ISO, boot it) are familiar to anyone who has used VirtualBox or VMware. The complexity arrives when you want clustered storage, high availability, or advanced networking (VLANs, OVS, SDN). You can ignore all of that and still run a perfectly capable single-node hypervisor for years.
What hardware does each one need?
The minimum-viable specs are similar; the comfortable specs differ. ECC RAM is a meaningful divider.
Proxmox VE runs on anything from a Pi 4 (via a community port) to a 192-core Xeon. Realistic minimum: 4 cores, 8GB RAM, 256GB SSD. Comfortable: 8 cores, 32GB RAM, 1TB NVMe for VM disks plus a separate storage pool. ECC RAM is recommended but not required.
TrueNAS Scale publishes 8GB RAM as the minimum but the ZFS community recommends 1GB RAM per 1TB of storage as a rule of thumb (it's an exaggeration for typical home loads, but the principle is real - ZFS uses RAM for ARC cache). ECC RAM is strongly recommended because ZFS writes a corrupted in-memory checksum to disk if RAM flips a bit. For a 20-30TB pool, target 32GB ECC.
Unraid runs comfortably on 8GB RAM for storage-only use, 16-32GB for serious Docker + VM workloads. ECC RAM is optional - Unraid's array is not ZFS (parity is computed differently) so the ECC-or-bit-rot argument is weaker. A high-quality SSD is recommended for the cache drive (where new writes land before the nightly mover pass).
What about Docker and Kubernetes?
All three support Docker, but the experience differs noticeably.
Unraid has the most polished Docker experience. The Community Applications catalogue is curated, container templates are pre-built with sensible defaults, and the web UI exposes container settings without requiring docker-compose. Adding Home Assistant or Plex is a 30-second job.
TrueNAS Scale migrated from Docker-on-systemd to K3s-based Apps in 22.x, then back toward Docker in TrueNAS 24.x (Electric Eel) - which caused some breakage for early adopters. The current state is a Docker-native Apps catalogue similar to Unraid's but smaller. Community charts add coverage. The first-class K3s pathway is gone for now.
Proxmox doesn't ship a Docker integration. The standard pattern is to run Docker inside an LXC container or inside a small Debian / Ubuntu VM. This is more setup work but gives you full Linux access. Power users prefer this because Docker upgrades, kernel modules, and host-network access work the way they do on bare metal.
Which is more reliable for storage?
For pure storage integrity, TrueNAS Scale wins clearly. ZFS is the most thoroughly tested open-source file system for data preservation. End-to-end checksumming detects silent corruption that other file systems miss. Snapshots are atomic and near-instant. Replication to a second pool (on the same machine or across the network) is a one-command setup.
Unraid's array uses single or dual parity disks that protect against drive failure but do NOT detect silent bit-rot the way ZFS scrubs do. Unraid added optional ZFS support in 6.12 (for cache pools and single-disk file systems), but the main array still uses XFS or BTRFS. For a media library where the occasional bit-flip is annoying but not catastrophic, Unraid's approach is fine. For irreplaceable family photos and tax records, prefer ZFS.
Proxmox-with-ZFS is functionally equivalent to TrueNAS at the file-system layer (both use OpenZFS), but Proxmox makes you build the pool yourself via CLI or the web UI's ZFS panel. TrueNAS bundles the storage tooling, the snapshot UI, the replication scheduler, and the sharing protocols into a coherent product.
Should you pay for Unraid?
The £49-£249 Unraid licence is the only paid option of the three. Whether it's worth it depends on your priorities.
The case for paying: Unraid's mixed-disk parity array is the format you can't replicate elsewhere without considerable work. If you have a stack of mixed-size second-hand drives and want them all in one logical array, no free alternative offers this. The polished UI and pre-built Docker catalogue also save real hours over Proxmox or TrueNAS.
The case against: If you're starting with new drives and can buy matching sizes, ZFS-on-Proxmox or TrueNAS Scale give you better data integrity for free. The £109 Unleashed licence (the entry point for serious use) buys polish, not capability.
The newer £49 Starter tier (6 storage devices max) is the right entry point for someone testing Unraid on a single old PC before committing to a larger build. Older Plus/Pro perpetual licences from before April 2025 still work but new buyers go through the Starter/Unleashed/Lifetime tiers.
Frequently asked questions
Q01Can I run TrueNAS Scale inside a Proxmox VM?
Q02What about UnraidOS for ARM (Raspberry Pi)?
Q03Does any of them work with consumer-grade hardware?
Q04Can I migrate between them later?
Q05What if I want to learn Linux properly?
Q06Which is best for Home Assistant?
- Raspberry Pi home server: weekend build guide - the lower-spec entry point if you're not ready to commit to a dedicated x86 box.
- Best NAS for home 2026 (UK) - off-the-shelf alternatives (Synology, UGREEN) for buyers who want hardware + software bundled.
- Best Raspberry Pi alternatives 2026 - ARM single-board computers when Pi stock is short.
- Self-host Bitwarden with Vaultwarden - a typical first Docker workload to put on whichever OS you choose.