Door Locks · Head to head

Aqara Smart Lock U400 vs ULTRALOQ Bolt SE

Full Smart Door Locks comparison in 2026

Updated June 2026
Data from Amazon and official Aqara and ULTRALOQ sites.
2026 verdict
Between ULTRALOQ Bolt SE and Aqara Smart Lock U400, ULTRALOQ Bolt SE is the better overall pick in 2026, leading on price, rating, and battery life. It has the clearer edge on price, rating, and battery life, and it stays ahead on integrations. There is still a case for Aqara Smart Lock U400, but mainly if weather resistance, Lock/Unlock system, and Anti-peep password are what you value most. That is enough to make ULTRALOQ Bolt SE the better pick for most buyers.
vs
FeatureAqara Smart Lock U400ULTRALOQ Bolt SEWinner
Price$269.99$89.90ULTRALOQ Bolt SE
Rating4.04.3ULTRALOQ Bolt SE
Weather ResistanceIP65NOAqara Smart Lock U400
Battery Life6 months18 monthsULTRALOQ Bolt SE
IntegrationsGoogle Home, Alexa, Apple HomeKit, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterULTRALOQ Bolt SE
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Bluetooth, Passcode, Fingerprint, Physical KeyAqara Smart Lock U400
Anti-peep PasswordYESNOAqara Smart Lock U400
ConnectivityBluetooth, Thread Protocol, Other2.4 GHz WiFi, Bluetooth, Thread ProtocolTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Emergency FingerprintNONOTie
DoorbellNONOTie
Winner
ULTRALOQ

ULTRALOQ Bolt SE

25% OFF
$89.90
$119.99
Buy on Amazon USA
  • + Price: $89.90
  • + Rating: 4.3
  • + Battery Life: 18 months
  • - Weather Resistance: NO vs IP65
  • - Lock/Unlock System: Remote, Bluetooth, Passcode, Fingerprint, Physical Key vs Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key

Frequently Asked Questions

Which is better overall: Aqara Smart Lock U400 or ULTRALOQ Bolt SE?

ULTRALOQ Bolt SE has the stronger overall profile in this comparison, especially for price, rating, and battery life.

What is the biggest difference between Aqara Smart Lock U400 and ULTRALOQ Bolt SE?

Price is one of the clearest differences: Aqara Smart Lock U400 lists $269.99, while ULTRALOQ Bolt SE lists $89.90.

Which one looks better on price?

Aqara Smart Lock U400 is listed at $269.99, while ULTRALOQ Bolt SE is listed at $89.90. ULTRALOQ Bolt SE (better spec).

Who should buy Aqara Smart Lock U400?

Choose Aqara Smart Lock U400 if your priority is weather resistance and Lock/Unlock system and that matters more than price.

Who should buy ULTRALOQ Bolt SE?

Choose ULTRALOQ Bolt SE if your priority is price and rating and that matters more than weather resistance.

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