Ask this question anywhere and you will get a fight, which is odd, because the two products are not really competing for the same job. Once you see what each one is for, the choice mostly makes itself.
The one-line version
Proxmox runs other computers inside itself. One physical machine behaves like several, each with its own operating system, that you can start, stop, copy and roll back independently.
TrueNAS looks after disks. It keeps files safe, notices when a drive is failing, takes snapshots so a deleted folder can be brought back, and shares storage across the house.
So the real question is not which is better. It is which of those two jobs you need, and the most common honest answer is both.
Side by side, as of 21 September 2026
| Proxmox VE | TrueNAS | |
|---|---|---|
| What it is for | Running virtual machines and containers | Storage and file sharing |
| Current release | 9.2 | 25.10.7 |
| Built on | Debian 13 | Debian Linux |
| Memory, stated minimum | 1 GB plus your guests | 8 GB |
| Boot storage, stated minimum | Not stated | 20 GB |
| Cost for home use | Free | Free |
| Licence | AGPL-3.0 or later | Open core, middleware LGPL-3.0 |
Proxmox’s current version comes from its own release history and its memory figure from its system requirements page. TrueNAS’s current build is listed on its software status page and its minimums in its hardware guide. The licences are in Proxmox’s copyright file and the TrueNAS middleware repository.
Two numbers in that table deserve a second look. Proxmox’s 1 GB is not the frugal figure it looks, because it excludes the machines you are running on top, which is the whole point of running it. And TrueNAS’s much higher 8 GB is not greed: its filesystem, ZFS, uses spare memory as a cache and gets faster the more it has.
If you only want one
Choose TrueNAS if the machine’s job is holding files. A family photo archive, a backup target for everyone’s laptops, a shared drive, a film library. It is built for exactly this, the storage features are the product rather than an add-on, and it will warn you about a failing disk before the failure costs you anything.
Choose Proxmox if the machine’s job is running things. Several services that do not get on with each other, a test machine you want to wipe and rebuild on a whim, or the ability to roll a whole system back to yesterday after a mistake. It is also where you go if you want to learn how the infrastructure at work actually operates.
Why most people end up running both
Here is the part that most comparisons skip, and it is the answer most experienced people land on.
You install Proxmox on the bare machine, then run TrueNAS as one of the virtual machines inside it, and hand the storage disks directly to TrueNAS. Proxmox gets to do what it is good at, TrueNAS gets to do what it is good at, and you get both jobs from one box.
The catch is real and worth knowing before you start. TrueNAS needs direct control of the disks to protect them properly, which means passing the physical storage controller through to the virtual machine rather than sharing individual disks. It works well, but it is one more layer to understand, and a setup like this is harder to fix at eleven at night when something goes wrong.
If you are new to this, start with one. Pick by the job above, run it for a few months, and add the second layer only once you know you need it. Nothing about choosing one now stops you nesting them later.
What would make this page wrong
Both products ship regularly, and this page is only true of the releases named at the top. The one change that would genuinely alter the advice is if either product took on the other’s job well enough to make the pairing unnecessary. That is the thing to watch across releases, and the reason this page carries a review date rather than pretending the answer is permanent.