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Door Locks · Head to head

Aqara Smart Lock U400 vs Eufy FamiLock E34

Full Smart Door Locks comparison in 2026

Updated September 2026
Data from Amazon and official Aqara and Eufy sites.
2026 verdict
Eufy FamiLock E34 has the better all-around case than Aqara Smart Lock U400 in 2026, starting with price, rating, and battery life.
Eufy FamiLock E34
Winner
Eufy FamiLock E34
$229.99$279.9918% OFF
Buy on Amazon USACheck price
It separates itself most clearly on price, rating, and battery life, while still looking better on its broader overall balance. Aqara Smart Lock U400 remains a niche alternative if connectivity and Lock/Unlock system matter more than the rest of the comparison. That keeps the verdict firmly in favor of Eufy FamiLock E34.
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FeatureAqara Smart Lock U400Eufy FamiLock E34Winner
Price$269.99$229.99Eufy FamiLock E34
Rating4.14.2Eufy FamiLock E34
Battery Life6 months8 monthsEufy FamiLock E34
ConnectivityBluetooth, Thread Protocol, Other2.4 GHz WiFiAqara Smart Lock U400
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Passcode, Physical KeyAqara Smart Lock U400
Weather ResistanceIP65IP65Tie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Anti-peep PasswordYESYESTie
Emergency FingerprintNONOTie
DoorbellNONOTie
Winner
Eufy

Eufy FamiLock E34

18% OFF
$229.99
$279.99
Buy on Amazon USACheck price
  • + Price: $229.99
  • + Rating: 4.2
  • + Battery Life: 8 months
  • - Connectivity: 2.4 GHz WiFi vs Bluetooth, Thread Protocol, Other
  • - Lock/Unlock System: Remote, Passcode, Physical Key vs Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key

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
  • Eufy FamiLock E34

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Frequently Asked Questions

Which is better overall: Aqara Smart Lock U400 or Eufy FamiLock E34?

Eufy FamiLock E34 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 Eufy FamiLock E34?

Price is one of the clearest differences: Aqara Smart Lock U400 lists $269.99, while Eufy FamiLock E34 lists $229.99.

Which one looks better on price?

Aqara Smart Lock U400 is listed at $269.99, while Eufy FamiLock E34 is listed at $229.99. Eufy FamiLock E34 (better spec).

Who should buy Aqara Smart Lock U400?

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

Who should buy Eufy FamiLock E34?

Choose Eufy FamiLock E34 if your priority is price and rating and that matters more than connectivity.

Full comparison table

Compare all 44 Door Locks side by side

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  • 44 Door Locks
  • 55 specs compared
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