Aqara Smart Lock U400 vs Nuki Smart Lock Go

Aqara Smart Lock U400 wins with its higher rating, IP65 panel, built-in fingerprint, keypad, NFC, Home Key and UWB unlocking, and guest password features. Nuki Smart Lock Go counters with a lower price and native Google and Alexa support without extra hubs.

Hardware completeness. The Aqara includes every unlock method plus UWB approach-unlock for iPhone and Apple Watch. The Nuki is a bare interior motor for European cylinders where keypad and fingerprint are paid accessories and full remote access needs an add-on purchase.

The Nuki Smart Lock Go natively supports Google Home, Alexa, HomeKit, SmartThings, Home Assistant and Matter. The Aqara Smart Lock U400 covers HomeKit, Home Assistant and Matter via Thread, but requires an Aqara hub for Google Home and Alexa.

The Aqara Smart Lock U400 runs about 6 months per charge with a USB-C emergency port. The Nuki Smart Lock Go uses four AA cells (some owners report swelling units) and carries a 2-year warranty with praised customer service.

Choose Aqara Smart Lock U400 for a flagship keyless door, especially with iPhone or Apple Watch: UWB hands-free entry, fingerprint, codes, NFC and IP65 sealing on the outer panel.

Choose Nuki Smart Lock Go for the most affordable Euro-cylinder retrofit with auto-unlock as you arrive and native voice-assistant support, accepting accessory costs for keypad or fingerprint entry.