Answer 5 questions about your use case, drives, and comfort level, get a ranked recommendation between Unraid, TrueNAS Scale, and Proxmox VE with an honest explanation of why each fits (or doesn't fit) your priorities.
This homelab OS selector recommends whether Unraid, TrueNAS SCALE, or Proxmox VE best suits your setup based on your use case, drive configuration, and technical comfort level. Answers 5 questions about your workload, data redundancy needs, and Docker/VM requirements to give a ranked recommendation with reasoning.
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| Feature | Unraid | TrueNAS Scale | Proxmox VE |
|---|---|---|---|
| Price | $59-129 USD (one-off) | Free | Free (paid support optional) |
| File system | XFS + Btrfs (ZFS in v7+) | ZFS (native, mature) | ZFS, ext4, XFS |
| Mixed drive sizes | Native, any combination | Requires matching per vdev | Depends on setup |
| Docker containers | Excellent (Community Apps) | Good (Apps system) | Via LXC or VM |
| Virtual machines | Basic (KVM available) | Basic (bhyve-based) | Enterprise-grade (KVM) |
| Data integrity | Good (parity, no checksumming) | Excellent (ZFS checksums + self-heal) | Excellent (ZFS when used) |
| Learning curve | Low | Medium | High |
| Best for | Mixed drives + apps + ease of use | Data safety + apps + ZFS | VMs + advanced users |
You have a mix of drives in different sizes sitting around, or you want the easiest path to running self-hosted apps like Plex, Jellyfin, Home Assistant, and others. Unraid's Community Applications plugin gives you a curated Docker ecosystem that's significantly easier to manage than setting up containers on TrueNAS or Proxmox. The web interface is the most beginner-friendly of the three, and most home users are productive on day one without touching the terminal. The trade-offs: it costs money, and it doesn't use ZFS by default (though ZFS support was added in Unraid 7 and is maturing quickly).
Data safety is non-negotiable. ZFS is the gold standard for filesystem integrity, it checksums every block and self-heals from corruption by comparing against parity data. TrueNAS Scale is free, runs a polished web interface, and has a growing Docker/app ecosystem through its built-in Apps system (based on Helm charts and Kubernetes). The trade-offs: ZFS pools work best with matching drive sizes, the app ecosystem is less polished than Unraid's Community Apps, and you'll need to understand ZFS concepts (vdevs, datasets, scrubs, snapshots) to get the most out of it.
You want a full enterprise-grade hypervisor running VMs and containers, and storage is a secondary concern. Proxmox gives you features most homelabbers never fully use: live migration, clustering, high availability, and fine-grained resource allocation. It's free. The trade-offs: Proxmox is not a NAS OS, you'll need to configure file sharing (NFS, SMB) manually or run TrueNAS Scale as a VM inside Proxmox (a popular but complex combo). Initial setup and troubleshooting regularly require terminal access. The learning curve is the steepest of the three.
Unraid is a commercial NAS OS optimised for mixed drive sizes and Docker containers, with a beginner-friendly web interface. TrueNAS Scale is a free, open-source NAS OS built on ZFS, the most reliable filesystem available. Proxmox VE is a free enterprise-grade hypervisor for running virtual machines and containers, but is not a dedicated NAS OS. Each has a different ideal user profile, this tool helps you figure out which fits yours.
For users with mixed drive sizes, a preference for a polished web interface, or who want the best Docker/container ecosystem for homelab apps, yes. Unraid's Community Applications plugin makes self-hosted app deployment significantly easier than TrueNAS or Proxmox. The licence is $59-129 USD (one-off, not a subscription) and there is a free 30-day trial.
Yes, but Proxmox is not a NAS OS. You'll need to configure file sharing (NFS, SMB) manually or run TrueNAS Scale as a VM inside Proxmox. Many advanced homelabbers do exactly this, it gives you full hypervisor control with ZFS storage underneath. The trade-off is setup complexity; Proxmox assumes Linux familiarity.
Not as elegantly as Unraid. ZFS pools work best with matching drives within each vdev. You can create separate vdevs with different sizes, but you lose the efficiency of a single unified pool. If you have mixed drives and want to use them all efficiently in one pool, Unraid is the better choice despite scoring lower on data safety.
No. This tool covers general-purpose homelab operating systems you install yourself. Synology DSM, QNAP QTS, and Ugreen UGOS are proprietary operating systems tied to specific hardware, the OS comes with the device. If you're buying a pre-built NAS from these brands, the OS is already decided for you.