Synology vs TrueNAS
Synology is a polished commercial NAS appliance: buy the box, add drives, and a friendly OS does the rest. TrueNAS is free software you run on your own hardware, built on ZFS for maximum data integrity. Synology for ease and a turnkey experience; TrueNAS for power, ZFS, and better value if you build your own.
Updated 2026-06-03 · by Jonathan Caruso
Side by side
| Synology | TrueNAS | |
|---|---|---|
| What you buy | Hardware plus DSM software | Free software, your own hardware |
| Ease | Very easy, turnkey | More setup, more control |
| Filesystem | Btrfs on mdraid, or ext4 | ZFS |
| Hardware | Synology's (often modest CPUs) | Whatever you choose |
| Apps | Polished package center | Apps and VMs |
| Support | Official vendor support | Community |
| Cost | Appliance premium | Lower (DIY) but more effort |
| Best at | Turnkey ease and support | Power, ZFS integrity, value |
Appliance vs DIY
Synology sells you a finished product: a box, an operating system (DSM), and a support line. You plug in drives and a friendly UI walks you through the rest. TrueNAS is free software you install on hardware you provide, which gives you control and value at the cost of doing the build and setup yourself.
That is the whole tension: pay more for a polished, supported appliance, or invest effort for power, ZFS, and a better price per terabyte.
Synology: turnkey ease
DSM is genuinely good: friendly, feature-rich, with a polished package center for apps like photos, backups, and media. For a non-technical user or anyone who wants set-and-forget storage with a vendor to call, Synology is hard to beat.
The downsides are hardware and direction. Synology's CPUs are often modest for the price, the appliance carries a premium, and on some newer models the company has moved toward requiring or favoring its own branded drives, which limits full functionality with third-party disks.
TrueNAS: power and ZFS
TrueNAS is free, runs on hardware you choose, and is built on ZFS, so you get checksummed integrity, snapshots, and replication. It is more capable for advanced uses, scales further, and costs less per terabyte once you supply the hardware.
The trade is effort: you build or repurpose a machine, plan your ZFS pool, and maintain it yourself, with the community rather than a vendor for support. For people comfortable with that, the integrity and value are worth it.
Which fits
Want plug-and-play storage with official support and a friendly UI? Buy a Synology, just check the model's drive-compatibility policy first. Want ZFS-grade integrity, full control, and better value on your own hardware? Run TrueNAS.
If you have decided to build your own, the next question is which NAS OS, so see TrueNAS vs Unraid, and Proxmox vs TrueNAS if you also want virtualization on the box.
Where Synology wins
- Turnkey: buy it, add drives, and DSM does the rest.
- Polished software, great apps, and official vendor support.
- The easiest option for non-technical users.
Where TrueNAS wins
- Free, and runs on hardware you choose for better value.
- ZFS integrity, snapshots, and replication.
- More capable and scalable for advanced setups.
Which to pick, by situation
| Your situation | Pick | Why |
|---|---|---|
| Want plug-and-play with support | Synology | Turnkey appliance with a polished OS and vendor support. |
| Want ZFS integrity and full control | TrueNAS | Free, runs on your hardware, with checksummed ZFS. |
| Comfortable building a PC, value matters | TrueNAS | Better price per terabyte on hardware you choose. |
| Non-technical, set and forget | Synology | The friendliest path to a working NAS. |
The verdict
For a turnkey, friendly NAS with official support and great apps, buy a Synology, just check its drive-compatibility policy first. For ZFS-grade data integrity, full control, and better value on hardware you choose, run TrueNAS. The split is ease versus power and value. For DIY comparisons, see TrueNAS vs Unraid and Proxmox vs TrueNAS.
Choose Synology if you want a polished, supported, plug-and-play appliance and will pay the premium for ease.
Choose TrueNAS if you want ZFS integrity, full control, and better value on hardware you build and maintain yourself.
Official links
Synology
FAQ
What is the Synology controversy?
On some newer models Synology has moved toward requiring or strongly favoring its own branded drives, limiting full functionality with third-party drives. That, plus appliance pricing, has pushed some users toward DIY options like TrueNAS. Check a model's drive-compatibility policy before buying.
Is Synology still the best NAS?
For a turnkey, easy, supported NAS it is still excellent. But its hardware is often modest for the price, and the drive-compatibility direction frustrates some users, so DIY options like TrueNAS and Unraid are increasingly popular for value and control.
What are the disadvantages of TrueNAS?
It needs hardware you supply and set up, ZFS wants more RAM and rewards planning your pool, and there is no single vendor to call for support. In exchange you get ZFS integrity, full control, and better value.
Is TrueNAS still free?
Yes. TrueNAS Community Edition is free and open source. You only pay for the hardware you run it on.