Door Locks · Head to head

Aqara Smart Lock U600 vs Nuki Smart Lock Pro

Full Smart Door Locks comparison in 2026

Updated October 2026
Data from the official Aqara and Nuki sites.
2026 verdict
For a UK multipoint front door, the Aqara Smart Lock U600 is the stronger buy, and it is the only one of these two built to live outdoors.
It carries an IP65 exterior panel, runs up to ten months on AA batteries, and packs a fingerprint reader, keypad, NFC and Apple Home Key into the lock itself over Matter with Thread. The Nuki Smart Lock Pro takes a different route: a retrofit that mounts over a European euro-cylinder, keeps the existing key, and relies on built-in Wi-Fi so remote access works with no Thread border router or bridge. That makes the Nuki Smart Lock Pro the better pick for a European cylinder door, and the Aqara Smart Lock U600 the winner on weather sealing, battery life and built-in entry methods for a multipoint door. Check which cylinder your door has before choosing.
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FeatureAqara Smart Lock U600Nuki Smart Lock ProWinner
Rating4.44.3Aqara Smart Lock U600
Weather ResistanceIP65NOAqara Smart Lock U600
Battery Life10 months6 monthsAqara Smart Lock U600
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Bluetooth, Passcode, Fingerprint, Physical KeyAqara Smart Lock U600
One-Time PasswordYESKeypad requiredAqara Smart Lock U600
Periodic PasswordYESKeypad requiredAqara Smart Lock U600
ConnectivityBluetooth, Thread Protocol, Other2.4 GHz WiFi, Bluetooth, Thread ProtocolTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Emergency FingerprintNONOTie
DoorbellNONOTie

What the differences mean

Weather sealing

The Aqara Smart Lock U600 rates its outer panel IP65 and its operation from -20C to +55C, so it takes dust, splashes and heavy rain on a front door. The Nuki Smart Lock Pro carries no weather rating at all, which is what keeps it on the inside of a sheltered European door.

Door and how it installs

The Aqara Smart Lock U600 replaces the handle plates on a UK multipoint door and keeps its locking body. The Nuki Smart Lock Pro mounts inside over an existing European euro-cylinder without changing it, so you keep your key and drill nothing. Each needs its own door type.

Remote access and the bridge

The Nuki Smart Lock Pro has Wi-Fi built in, so remote control and smart-home access work out of the box. The Aqara Smart Lock U600 reaches remote and automations over Matter with Thread, which needs a Thread Border Router, an Aqara hub or a compatible Matter controller, before it is fully remote.

Keypad and fingerprint

The Aqara Smart Lock U600 has a fingerprint reader, keypad, NFC and Apple Home Key on the lock itself. The Nuki Smart Lock Pro has none of those built in: passcode and fingerprint entry come from Nuki's separate Keypad accessory, which adds to the cost and is one more thing to buy.

Battery

The Aqara Smart Lock U600 uses four AA batteries rated for up to ten months. The Nuki Smart Lock Pro uses a built-in rechargeable pack rated around six months. One is a swap of cheap cells, the other a recharge over USB, so pick by which chore you mind less.

Which one to buy if

What owners say

Nuki Smart Lock Pro owners lead with the install and the built-in Wi-Fi: mounting over the existing cylinder is quick and tool-free, and those coming from the cheaper Nuki Go single out the Pro for including Wi-Fi rather than charging extra for it. A strong, fast motor, a rechargeable battery that charges quickly, and hands-free auto-unlock as they approach with full hands get the most mentions, along with an intuitive app and Nuki's responsive support. The recurring caveats are the price, which climbs further with the keypad accessory, a handful of battery or reliability complaints, and the fit checks before buying: the cylinder has to protrude and the key must work from both sides.

Frequently Asked Questions

Which is better overall: Aqara Smart Lock U600 or Nuki Smart Lock Pro?

For a UK multipoint door, the Aqara Smart Lock U600, which adds IP65 weather sealing, up to ten months of battery life and built-in fingerprint, keypad, NFC and Apple Home Key. The Nuki Smart Lock Pro is better for a European euro-cylinder, where its tool-free retrofit and built-in Wi-Fi for remote access shine.

What is the biggest difference between the Aqara Smart Lock U600 and the Nuki Smart Lock Pro?

The install. The Aqara Smart Lock U600 swaps the handle plates on a UK multipoint door, while the Nuki Smart Lock Pro mounts inside over a European euro-cylinder and keeps your existing key. That also decides which front doors each one can be fitted to.

Does the Nuki Smart Lock Pro need a bridge for remote access?

No. The Nuki Smart Lock Pro has Wi-Fi built in, so remote control and smart-home access work without buying a bridge or add-on. By contrast, the Aqara Smart Lock U600 reaches remote control over Matter with Thread and needs a Thread Border Router, such as an Aqara hub or a compatible Matter controller.

Which of these locks is weatherproof?

The Aqara Smart Lock U600. Its outer panel is IP65 rated and it operates from -20C to +55C, so it suits an exposed front door. The Nuki Smart Lock Pro has no weather rating and is meant to sit on the inside of a European door.

Who should buy the Aqara Smart Lock U600?

Owners of a UK multipoint front door who want a weatherproof lock with Apple Home Key, a fast fingerprint reader, keypad, NFC and a mechanical key built in, over Matter with Thread.

Who should buy the Nuki Smart Lock Pro?

Owners of a European cylinder door who want a tool-free retrofit that keeps their key, plus remote access and smart-home control out of the box through built-in Wi-Fi, and who are happy to add Nuki's keypad separately for codes and fingerprints.

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