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Door Locks · Head to head

Nuki Smart Lock Go vs Nuki Smart Lock Ultra

Full Smart Door Locks comparison in 2026

Updated October 2026
Data from Amazon and official Nuki site.
2026 verdict
Anyone choosing inside Nuki's retrofit range should buy the Nuki Smart Lock Ultra, the flagship smart lock that its owners rate well above the entry model.
Nuki Smart Lock Ultra
Winner
Nuki Smart Lock Ultra
€349.00
Buy on Amazon USACheck price
On paper the two are closer than the gap in price suggests: the Nuki Smart Lock Go has the same Wi-Fi, Bluetooth and Thread radios, the same Matter, Apple Home, Google Home, Alexa, SmartThings and Home Assistant support, the same auto-lock and geolocation unlock, and the same 2 year warranty. What the Nuki Smart Lock Ultra changes is the hardware, a built-in rechargeable battery instead of 4x AA cells, a body that weighs 250g against 335g, colour options and remote access that is included rather than a one-time purchase, and its owners describe it as faster and more refined than any earlier Nuki. The Nuki Smart Lock Go is the cheaper way into the same ecosystem, but its owners report more motor failures in the first year. Pick the Nuki Smart Lock Ultra if you want the lock to last, and the Nuki Smart Lock Go for a budget renter install.
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FeatureNuki Smart Lock GoNuki Smart Lock UltraWinner
Price€109.00€349.00Nuki Smart Lock Go
Rating3.84.5Nuki Smart Lock Ultra
Warranty2 years2 yearsTie
Weather ResistanceNONOTie
Connectivity2.4 GHz WiFi, Bluetooth, Thread Protocol2.4 GHz WiFi, Bluetooth, Thread ProtocolTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, Physical KeyRemote, Bluetooth, Passcode, Fingerprint, Physical KeyTie
One-Time PasswordKeypad requiredKeypad requiredTie
Periodic PasswordKeypad requiredKeypad requiredTie
Anti-peep PasswordNONOTie
Emergency FingerprintNONOTie
DoorbellNONOTie

What the differences mean

Battery

The Nuki Smart Lock Ultra has a built-in rechargeable battery rated for 6 months. The Nuki Smart Lock Go runs on 4x AA cells, which means buying batteries, and a few of its owners had cells swell or leak inside the lock.

Size and finish

The Nuki Smart Lock Ultra measures 57 x 58 mm and weighs 250g, and comes in more than one colour. The Nuki Smart Lock Go is bigger at 110 x 60 x 60 mm and 335g, in a single finish.

Smart home and radios

Almost no difference. Both have 2.4 GHz Wi-Fi, Bluetooth and Thread, and both work with Matter, Apple Home, Google Home, Alexa, SmartThings and Home Assistant. The one gap is remote unlocking, which the Nuki Smart Lock Ultra lists as included and the Nuki Smart Lock Go lists as needing a one-time purchase.

Keypad and fingerprint

Neither has one built in. Both take codes only with Nuki's keypad and fingerprints only with Keypad 2, so the accessory cost is the same whichever lock you choose.

Which one to buy if

What owners say

Owners of both Nuki locks praise the same things: a retrofit that goes over the existing cylinder without drilling, hands-free unlocking as they walk up with a phone or watch, a polished app and customer support that answers fast. The two groups part ways on reliability and on what they got for the money. Nuki Smart Lock Go owners report motor errors after several months, AA batteries that swelled or leaked in a few units and frustration that remote and smart home access needed a paid add-on despite the marketing. Nuki Smart Lock Ultra owners, many upgrading from an older Nuki, describe a faster, more compact and more premium lock with remote access working out of the box, and their complaints are mostly about cost and small install quirks like setting the cylinder length.

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.

  • Nuki Smart Lock Go
  • Nuki Smart Lock Ultra

Loading price history...

Frequently Asked Questions

Which is better overall: Nuki Smart Lock Go or Nuki Smart Lock Ultra?

The Nuki Smart Lock Ultra. It shares the Nuki Smart Lock Go's radios, integrations and auto-unlock, and adds a rechargeable battery, a smaller body, colour options and a build its owners describe as Nuki's best yet.

What is the difference between the Nuki Smart Lock Go and the Nuki Smart Lock Ultra?

Mostly the hardware. The Nuki Smart Lock Ultra has a built-in rechargeable battery and weighs 250g, while the Nuki Smart Lock Go runs on 4x AA and weighs 335g. Wi-Fi, Bluetooth, Thread, Matter and the supported platforms are the same on both.

Do the Nuki Smart Lock Go and Nuki Smart Lock Ultra need a bridge for remote access?

Both have 2.4 GHz Wi-Fi and Thread, so no separate bridge is needed, but the Nuki Smart Lock Go lists remote unlocking as a one-time purchase while the Nuki Smart Lock Ultra includes it. Owners of the Nuki Smart Lock Go in particular say they did not expect that extra step.

Is the Nuki Smart Lock Go reliable?

Its owners praise the install and hands-free unlocking, but several report motor errors after roughly five to twelve months, with Nuki replacing units quickly. Nuki Smart Lock Ultra owners do not raise the same complaint.

Who should buy the Nuki Smart Lock Go?

Renters and budget buyers with a European cylinder door who want Nuki's app, auto-unlock and Matter support at the lowest cost, and who are fine buying AA batteries.

Who should buy the Nuki Smart Lock Ultra?

Buyers who want Nuki's most refined lock: a rechargeable battery, a compact body in several colours and a faster, more premium lock that owners of earlier Nuki models call a real upgrade.

Full comparison table

Compare all 47 Door Locks side by side

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