NAS · Head to head

Ubiquiti UNAS 4 vs Ubiquiti UNAS Pro 4

Full NAS comparison in 2026

Updated October 2026
Data from Amazon and official Ubiquiti site.
2026 verdict
The Ubiquiti UNAS 4 is the better-rounded of the two NAS, and the Ubiquiti UNAS Pro 4 is the rack unit that steps up the hardware.
Ubiquiti UNAS 4
Winner
Ubiquiti UNAS 4
$574.99

Last recorded price

Buy on Amazon USA
The UNAS 4 is the more affordable of the pair and gives four bays, two M.2 NVMe slots, RAID 5 and RAID 6, a front USB-C port and single-cable PoE in a desktop chassis. The UNAS Pro 4 wins on one clear thing, its 8GB of memory against 4GB, and it moves the same four-bay layout into a 1U rackmount with two 10G SFP+ cages and a Gigabit port. Choose the UNAS 4 for a shelf and the Pro 4 when the install lives in a rack and needs SFP+ uplinks.
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FeatureUbiquiti UNAS 4Ubiquiti UNAS Pro 4Winner
Price$574.99$735.72Ubiquiti UNAS 4
Rating4.64.5Ubiquiti UNAS 4
Memory Capacity4 GB8 GBUbiquiti UNAS Pro 4
StorageNoneHot SwappableTie

What the differences mean

Form factor

The Ubiquiti UNAS 4 is a desktop box that sits on a shelf next to other gear. The Ubiquiti UNAS Pro 4 is a 1U rackmount 43.7mm tall, so it slides into a cabinet and trades the quieter desktop placement for rack tidiness.

Networking

The UNAS 4 carries one 2.5 GbE port that also delivers PoE power over a single cable. The UNAS Pro 4 has two 10G SFP+ cages plus a Gigabit port, which is far more throughput but needs SFP+ modules and a switch with matching cages.

Memory

The UNAS Pro 4 ships with 8GB of memory against 4GB on the UNAS 4. Neither is user-expandable, and the larger pool on the Pro 4 matters once UniFi Protect footage and several shares run at the same time.

Power

The UNAS 4 draws up to 90W, delivered over PoE, which some switches can supply per port. The UNAS Pro 4 draws up to 150W, so a rack install needs the right power budget rather than a single switch port.

Front port

The UNAS 4 has a front USB-C port for attaching external storage from the UniFi Drive interface. The UNAS Pro 4 omits it, so imports and one-off copies have to come over the network.

Which one to buy if

  • the NAS sits on a shelf next to your other gear
    Ubiquiti UNAS 4

    The UNAS 4 is a desktop unit with a single-cable PoE install that needs no rack.

  • your install lives in a rack and needs fast uplinks
    Ubiquiti UNAS Pro 4

    The UNAS Pro 4 fits 1U and carries two 10G SFP+ cages plus a Gigabit port.

  • you want to swap a failed drive without downtime
    Ubiquiti UNAS Pro 4

    The UNAS Pro 4 has hot-swappable bays, where the UNAS 4 needs powering down to replace a drive.

  • you want a front USB-C port for external storage
    Ubiquiti UNAS 4

    The UNAS 4 has a front USB-C port; the UNAS Pro 4 has none.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Ubiquiti UNAS 4
  • Ubiquiti UNAS Pro 4

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Frequently Asked Questions

Which is better overall: Ubiquiti UNAS 4 or Ubiquiti UNAS Pro 4?

The Ubiquiti UNAS 4 for a desktop install, since it is smaller and more affordable with four bays, two M.2 slots, RAID 5 and 6 and single-cable PoE. The Ubiquiti UNAS Pro 4 is the pick for a rack, with 8GB of memory, hot-swap bays and two 10G SFP+ cages in 1U.

What is the biggest difference between the Ubiquiti UNAS 4 and the Ubiquiti UNAS Pro 4?

Form factor and networking. The Ubiquiti UNAS 4 is a desktop unit with a 2.5 GbE PoE port, while the Ubiquiti UNAS Pro 4 is a 1U rackmount with two 10G SFP+ cages, a Gigabit port and 8GB of memory.

Do the Ubiquiti UNAS 4 and UNAS Pro 4 run the same software?

Yes, both run UniFi Drive and are managed inside the UniFi console, with snapshots and remote backup. Neither runs Docker containers, virtual machines or a third-party app store.

Which one is easier to install power over Ethernet to?

The Ubiquiti UNAS 4 draws up to 90W over a single PoE cable, while the Ubiquiti UNAS Pro 4 draws up to 150W and fits a rack. Check that your switch can supply the PoE class before assuming a single cable will do.

Who should buy the Ubiquiti UNAS 4?

A UniFi household or small office that wants a tidy desktop NAS with four bays, NVMe caching and one PoE cable, without a rack.

Who should buy the Ubiquiti UNAS Pro 4?

A small business running UniFi that wants rack-mounted storage with 10G SFP+ uplinks, hot-swap bays and more memory in a single rack unit.

Full comparison table

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