Door Locks · Head to head

Aqara Smart Lock U400 vs Eufy Smart Lock C220

Full Smart Door Locks comparison in 2026

Updated July 2026
Data from Amazon and official Aqara and Eufy sites.
2026 verdict
In 2026, the recommendation leans toward Aqara Smart Lock U400 over Eufy Smart Lock C220, driven by weather resistance, connectivity, and integrations. Its clearest strengths are weather resistance, connectivity, and integrations, and it still looks stronger on lock/unlock system and one-time password. Eufy Smart Lock C220 still makes sense if price, rating, and battery life is your priority, but most buyers should still lean toward Aqara Smart Lock U400. As a general recommendation, Aqara Smart Lock U400 comes out on top.
vs
FeatureAqara Smart Lock U400Eufy Smart Lock C220Winner
Price$269.99$99.99Eufy Smart Lock C220
Rating4.14.3Eufy Smart Lock C220
Weather ResistanceIP65IP53Aqara Smart Lock U400
Battery Life6 months8 monthsEufy Smart Lock C220
ConnectivityBluetooth, Thread Protocol, Other2.4 GHz WiFiAqara Smart Lock U400
IntegrationsGoogle Home, Alexa, Apple HomeKit, Home Assistant, MatterGoogle Home, Alexa, Home AssistantAqara Smart Lock U400
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Passcode, Fingerprint, Apple Home Key, Physical KeyAqara Smart Lock U400
One-Time PasswordYESNOAqara Smart Lock U400
Periodic PasswordYESNOAqara Smart Lock U400
Anti-peep PasswordYESYESTie
Emergency FingerprintNONOTie
DoorbellNONOTie

Frequently Asked Questions

Which is better overall: Aqara Smart Lock U400 or Eufy Smart Lock C220?

Aqara Smart Lock U400 has the stronger overall profile in this comparison, especially for weather resistance, connectivity, and integrations.

What is the biggest difference between Aqara Smart Lock U400 and Eufy Smart Lock C220?

Price is one of the clearest differences: Aqara Smart Lock U400 lists $269.99, while Eufy Smart Lock C220 lists $99.99.

Which one looks better on price?

Aqara Smart Lock U400 is listed at $269.99, while Eufy Smart Lock C220 is listed at $99.99. Eufy Smart Lock C220 (better spec).

Who should buy Aqara Smart Lock U400?

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

Who should buy Eufy Smart Lock C220?

Choose Eufy Smart Lock C220 if your priority is price and rating and that matters more than weather resistance.

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