Updated November 2026
Data from the 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.
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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| Feature | Aqara Smart Lock U400 | Eufy FamiLock E34 | Winner |
|---|---|---|---|
| Price | $269.99 | $239.99 | Eufy FamiLock E34 |
| Rating | 4.1 | 4.2 | Eufy FamiLock E34 |
| Battery Life | 6 months | 8 months | Eufy FamiLock E34 |
| Connectivity | Bluetooth, Thread Protocol, Other | 2.4 GHz WiFi, Thread Protocol | Aqara Smart Lock U400 |
| Lock/Unlock System | Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key | Remote, Passcode, Physical Key | Aqara Smart Lock U400 |
| Weather Resistance | IP65 | IP65 | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| One-Time Password | YES | YES | Tie |
| Periodic Password | YES | YES | Tie |
| Anti-peep Password | YES | YES | Tie |
| Emergency Fingerprint | NO | NO | Tie |
| Doorbell | NO | NO | Tie |
$269.99
- + Connectivity: Bluetooth, Thread Protocol, Other
- + Lock/Unlock System: Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key
- - Price: $269.99 vs $239.99
- - Rating: 4.1 vs 4.2
Winner
14% OFF
$239.99
$279.99
- + Price: $239.99
- + Rating: 4.2
- + Battery Life: 8 months
- - Connectivity: 2.4 GHz WiFi, Thread Protocol vs Bluetooth, Thread Protocol, Other
- - Lock/Unlock System: Remote, Passcode, 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 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 $239.99.
Which one looks better on price?
Aqara Smart Lock U400 is listed at $269.99, while Eufy FamiLock E34 is listed at $239.99. 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.
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