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Door Locks · Head to head

Aqara Smart Lock U400 vs ULTRALOQ Bolt Mission

Full Smart Door Locks comparison in 2026

Updated September 2026
Data from Amazon and official Aqara and ULTRALOQ sites.
2026 verdict
Aqara Smart Lock U400 edges out ULTRALOQ Bolt Mission in 2026, led by price, rating, and Lock/Unlock system.
Aqara Smart Lock U400
Winner
Aqara Smart Lock U400
$269.99
Buy on Amazon USACheck price
The comparison tilts its way because of price, rating, and Lock/Unlock system, with its broader overall balance keeping it in front. The only strong reason to choose ULTRALOQ Bolt Mission is if battery life is more important to you than the overall verdict. In practical terms, Aqara Smart Lock U400 is the easier product to recommend.
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FeatureAqara Smart Lock U400ULTRALOQ Bolt MissionWinner
Price$269.99$299.99Aqara Smart Lock U400
Rating4.13.9Aqara Smart Lock U400
Battery Life6 months8 monthsULTRALOQ Bolt Mission
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Bluetooth, Passcode, NFC Tag, Physical KeyAqara Smart Lock U400
Weather ResistanceIP65IP65Tie
ConnectivityBluetooth, Thread Protocol, OtherBluetooth, Thread Protocol, OtherTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Emergency FingerprintNONOTie
DoorbellNONOTie

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.

  • Aqara Smart Lock U400
  • ULTRALOQ Bolt Mission

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Frequently Asked Questions

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

Aqara Smart Lock U400 has the stronger overall profile in this comparison, especially for price, rating, and Lock/Unlock system.

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

Price is one of the clearest differences: Aqara Smart Lock U400 lists $269.99, while ULTRALOQ Bolt Mission lists $299.99.

Which one looks better on price?

Aqara Smart Lock U400 is listed at $269.99, while ULTRALOQ Bolt Mission is listed at $299.99. Aqara Smart Lock U400 (better spec).

Who should buy Aqara Smart Lock U400?

Choose Aqara Smart Lock U400 if your priority is price and rating and that matters more than battery life.

Who should buy ULTRALOQ Bolt Mission?

Choose ULTRALOQ Bolt Mission if your priority is battery life and that matters more than price.

Full comparison table

Compare all 45 Door Locks side by side

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  • 45 Door Locks
  • 55 specs compared
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