DIY NAS vs Synology: Build or Buy in 2026?

The question is not really whether a DIY NAS is better than a Synology. It is whether the trade-offs are worth it for you. A DIY build gives you more drive bays per dollar and control over the software stack. A prebuilt Synology or QNAP provides integrated management tools with little ongoing setup.

This guide breaks down the costs, power, software, and maintenance of each approach, so you can match the path to your technical comfort, your budget, and how much time you want to spend managing storage.

We compare three paths: a DIY NAS built on low-power Intel N-series hardware running TrueNAS Community Edition, Unraid, or OpenMediaVault; the Synology DS925+; and the QNAP TS-464. All prices below exclude drives, which cost the same whichever box you put them in. Component prices, especially memory and SSDs, change often, so price your own parts list before comparing.

Total Cost Comparison

Synology DS925+, roughly $600 to $650

A four-bay enclosure with an AMD Ryzen V1500B (4 cores, 8 threads), 4 GB of ECC DDR4 (expandable to 32 GB), two 2.5GbE ports, and two M.2 NVMe slots. It has no PCIe slot, so it cannot take a 10GbE card, and it expands only with Synology’s DX525 unit. DSM is included.

QNAP TS-464, roughly $600 to $650

Four bays, an Intel Celeron N5095 (4 cores, 4 threads), 8 GB of DDR4 (16 GB maximum), two 2.5GbE ports, two M.2 NVMe slots, and a PCIe Gen 3 x2 slot for a 10GbE or storage card. QTS is included.

DIY path 1: mini PC as a small NAS

• Beelink EQ14: Intel N150 (4 cores), 16 GB DDR4 on one SO-DIMM (Beelink lists 16 GB as the maximum), and two M.2 2280 NVMe slots. Beelink sells it with dual 2.5GbE (Intel i226-V) or dual gigabit, so check the exact version. Beelink’s own store lists the 16 GB, 500 GB, dual-2.5GbE configuration at $385; retailer prices vary.
• A USB drive enclosure (single or dual bay), roughly $30 to $50.
• OpenMediaVault (free) or Unraid (from $49). TrueNAS works best with internal drives.

That comes to roughly $415 to $435 before any license. The EQ14’s two M.2 slots can hold a mirrored pair of SSDs for the main pool, with a USB hard drive for backups. The limits: no drive bays, no hot-swap, and USB adds a failure point.

DIY path 2: full DIY NAS with up to eight bays

• Mini-ITX motherboard with a low-power Intel N100 or N150-class CPU, roughly $120 to $150. Confirm it has a PCIe slot for the HBA and an ATX power input for an SFX supply; some boards in this class run from a DC barrel jack instead.
• Jonsbo N3 case, about $170: eight 3.5-inch drive bays, Mini-ITX, and SFX power supplies up to 105 mm long.
• SFX power supply (300 to 450W), roughly $45 to $60.
• LSI 9211-8i HBA flashed to IT mode, roughly $30 to $60 used. It adds eight SATA/SAS ports through the PCIe slot.
• Two SAS-to-SATA breakout cables, roughly $15 to $20.
• Boot SSD (128 to 256 GB), roughly $20 to $25.
• Memory: Intel lists 16 GB on a single channel as the N100’s official maximum. Price it separately; DDR4 and DDR5 module prices have moved a lot.

That comes to roughly $400 to $485 before memory and drives, for an eight-bay system. The DS925+ and TS-464 cost more for four bays, but they include an integrated enclosure, backplane, drive trays, and power supply, plus software that needs far less setup.

Performance and Hardware

CPU speed is not the main reason to build. The N100 and N150 are low-power quad-cores in the same broad class as the TS-464’s N5095, while the DS925+‘s V1500B has more threads. The DIY advantages are bay count, your choice of operating system, and a platform you can repair or upgrade part by part.

Where prebuilts have the edge: drive-bay integration. Hot-swap trays, a proper SATA backplane, status LEDs, and thermal management are engineered as one system. A Jonsbo N3 build works well, but you assemble and troubleshoot those pieces yourself.

Networking is a DIY advantage when you need unusual port counts or 10GbE. The DS925+ has dual 2.5GbE and no PCIe slot. The TS-464 has dual 2.5GbE plus a PCIe slot for 10GbE. A DIY board with a free PCIe slot can take any supported NIC, but in the full build above that slot is used by the HBA.

Power Consumption

Power matters because a NAS runs around the clock. At $0.18 per kWh, every watt of continuous draw costs about $1.58 a year.

Synology DS925+: Synology rates it at 12.3W with the drives hibernating and 37.9W during access.

QNAP TS-464: QNAP rates it at 21.6W in sleep mode and 40.5W in typical operation with all bays populated.

DIY build: Power depends on the board, the drives, and the HBA. Each 3.5-inch hard drive adds several watts at idle, so drive count dominates the total. A well-chosen low-power board keeps a DIY build in the same range as the prebuilts for the same number of drives, while an old desktop platform with an oversized power supply can double or triple it.

For scale: a platform that idles 20W higher costs about $32 more a year to run, and one that idles 60W higher costs about $95 more.

Software: TrueNAS vs DSM vs Unraid

This is where the decision gets personal.

Synology DSM

DSM is our recommendation for ease of administration. Its web interface is straightforward, and its mobile apps (Synology Photos, Synology Drive, DS file) integrate with its storage services. Btrfs gives you snapshots and data checksums. Container Manager handles Docker with Compose-based projects.

The downsides: DSM runs only on Synology hardware, Synology warns about third-party memory, and some add-ons, such as extra Surveillance Station camera licenses, cost more. Drive policy has also been a sore point. Since DSM 7.3 (October 2025), 2025 Plus, Value and J models accept third-party 3.5-inch HDDs and 2.5-inch SATA SSDs; M.2 storage pools and cache still need drives on Synology’s compatibility list.

TrueNAS Community Edition

TrueNAS Community Edition, called TrueNAS SCALE until the 25.04 release, is free and built on ZFS: checksums, copy-on-write, self-healing with redundancy, snapshots, and native encryption. Since 24.10, its apps run on Docker instead of Kubernetes, which makes app deployment much simpler.

The trade-offs: ZFS works best with matched drive sizes in a vdev. You can now grow a RAIDZ vdev one disk at a time (TrueNAS added RAIDZ expansion in 24.10), but mixing sizes wastes capacity. TrueNAS lists 8 GB of RAM as the minimum for up to eight drives, plus 1 GB for each additional drive.

Unraid

Unraid’s strength is flexibility. Its parity array lets you mix drive sizes, add one drive at a time, and read individual drives independently. The Starter license is $49 (up to six storage devices), Unleashed is $109 (unlimited devices), and Lifetime is $249. Starter and Unleashed include a year of updates, after which an optional $36 annual extension keeps new updates coming; if you skip it, you keep running your current version.

The downsides: the parity array writes more slowly than a striped RAID or ZFS pool, and XFS array disks do not checksum file data. Use Btrfs, or the ZFS pools Unraid has supported since version 6.12, if you want checksums.

Maintenance and Reliability

This is the factor most people underestimate. The time estimates below are our judgment for a typical home setup.

Synology/QNAP maintenance: DSM and QTS handle updates with a click or on a schedule. Drive health monitoring with email alerts is built in, and data scrubs run on a schedule. When a drive fails, you get a notification, swap the drive, and the array rebuilds. Monthly time: close to zero.

TrueNAS maintenance: You decide when to apply updates. ZFS scrubs run on a default schedule, but you need to check the results. SMART monitoring is built in, though alerts need setup. Apps need individual updates. When something breaks, you are reading forums and documentation. Monthly time: an hour or more, and more during initial setup.

Unraid maintenance: Similar oversight to TrueNAS. Parity checks run on a schedule, plugin and Docker updates are simple through the interface, and the forums are active, but you are your own support team.

If you enjoy tinkering and want to learn, the maintenance is part of the appeal. If you want storage that just works while you focus on other projects, buy a Synology.

DIY Build Recommendations

If you decide to build, start from the two paths in the cost section above, and verify every part, firmware version, and operating-system requirement before ordering.

Mini PC path: Good for learning, light file sharing, or a mirrored SSD pool with a USB backup drive. Choose the EQ14 version with dual 2.5GbE, and keep the operating system on its own small drive or partition.

Full build path: The Jonsbo N3 holds eight 3.5-inch drives, and the LSI 9211-8i supplies SATA ports for all of them. Flash the HBA to IT mode (plain passthrough, no hardware RAID) for ZFS or Unraid, or buy one already flashed.

Common Mistakes to Avoid

Using an old desktop for a 24/7 NAS. An old gaming PC with a large power supply can idle tens of watts above a low-power build, and at about $1.58 per watt per year that adds up fast.

Using ZFS without redundancy. ZFS checksums catch corruption, but a pool without redundancy cannot repair what it finds. Use at least a mirror or RAIDZ1. TrueNAS recommends ECC memory but does not require it, so treat ECC as a nice extra on a home build rather than a prerequisite.

Buying a Synology to run something else. Synology hardware is designed to run DSM, and DSM is what the premium pays for. If you want TrueNAS or Unraid, build or buy x86 hardware that suits it.

Ignoring HBA firmware. LSI cards must run IT-mode firmware (JBOD passthrough) for TrueNAS and Unraid. In IR mode (hardware RAID), your NAS software cannot manage the drives directly. Buy a pre-flashed card or follow a flashing guide carefully.

Skipping the UPS. Both DIY and prebuilt NAS units need one. A sudden power loss during a write can damage a pool or corrupt data, and a basic UPS is cheap insurance for everything stored on it.

Wrap-Up

The decision comes down to what you value more: control and cost per bay, or ease of setup and administration.

Build a DIY NAS if you enjoy hardware projects, want more than four bays without paying for a larger prebuilt, plan to run TrueNAS with ZFS, or want to choose every part.

Buy a Synology DS925+ or QNAP TS-464 if you want something that works out of the box, value your time over tinkering, want integrated mobile apps and storage services, or are building a NAS for family use where reliability matters more than customization.

For drives, see our best NAS hard drives guide. If you are leaning toward a prebuilt, our best NAS for home lab roundup compares the top options, and best NAS for Docker covers container workloads.