How to Build Your Own NAS in 2026: TrueNAS vs Unraid vs Synology and What It Will Actually Cost

[Estuary80]

A network attached storage device that sits on your home network and serves files to everything else in the house is one of the most useful things a home technology enthusiast can build or buy, and 2026 is a particularly good time to evaluate the options. Hard drives have stabilised at reasonable prices after the supply disruptions of 2023 and 2024. The software choices have matured. And the use cases have expanded beyond media storage to include backup targets, photo management, Plex servers, home assistant hubs and now local AI model hosting.

For a purpose-built self-managed NAS the two dominant software options are TrueNAS and Unraid. TrueNAS Scale uses ZFS as its filesystem, which provides data integrity verification and protection against silent corruption that no other consumer filesystem matches. It is more complex to set up and less flexible to change once configured but provides the highest data integrity guarantees. Unraid uses a parity drive system rather than RAID and allows mixing drive sizes, making it much more practical for building a NAS gradually by adding drives of whatever size is cheap at a given time. Unraid costs £49 to £89 for a licence and is generally considered easier for newcomers.

The alternative to building is buying a Synology DS223+ or DS423+, two-bay or four-bay units respectively priced at around £300 to £400 without drives. Synology's DSM operating system is polished, the ecosystem of apps is mature and the hardware is reliable. The trade-off is that you are locked into Synology's ecosystem and the hardware is not upgradeable. For most people who want a NAS that works without the satisfaction of building it themselves, a Synology is the right answer. For people who enjoy the building and tinkering process, Unraid on commodity hardware is the more rewarding route.

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[Phil80]

ZFS data integrity verification is the feature that makes TrueNAS the right choice for archival storage where you simply cannot afford silent corruption. For media files and backups where re-downloading or re-creating is possible, Unraid's parity approach is adequate and more flexible

[Router48]

The mixing drive sizes advantage of Unraid is underrated. Being able to add a 4TB drive when drives are cheap and later add an 8TB drive without rebuilding the array is enormously practical for home users who are not buying everything at once

[Dan96]

Synology DSM being the best polished NAS operating system is not really contested. The Docker app, the Photos app, the Drive sync, the Surveillance Station for cameras. The ecosystem is mature in a way that self-built TrueNAS or Unraid takes time to match

[Connor82]

The cost comparison needs to include drives. A four-bay Synology DS423+ at £350 plus four 4TB WD Red drives at around £80 each is a £670 total investment. An equivalent Unraid build on commodity hardware is probably similar or slightly cheaper but with more flexibility

[Rough Reece]

Plex on a NAS being one of the primary use cases means you need to think about transcoding. A Synology's Intel J4125 processor can handle some transcoding but struggles with 4K. An Unraid build with a more capable processor or a discrete GPU handles this much better

[BackRowBob]

Local AI model hosting on a NAS being a 2026 use case nobody anticipated when these systems were designed is the best example of how flexible this hardware is when you run a general purpose OS on it. A Phi-3 Mini running inference on an Unraid box with adequate RAM is an useful setup

[Baz]

The tinkering satisfaction argument for self-built is real and should not be dismissed as mere hobby justification. Understanding your storage infrastructure at a system level makes you better at managing it, more likely to actually maintain it, and more capable of recovering from failures