Winner
Updated November 2026
Data from the official Aqara and Eufy sites.
2026 verdict
Across the 2026 comparison, Aqara Smart Lock U100 earns the nod over Eufy Smart Lock E31 on the strength of rating, weather resistance, and Lock/Unlock system.
It has the clearer edge on rating, weather resistance, and Lock/Unlock system, and it stays ahead on its broader overall balance. There is still a case for Eufy Smart Lock E31, but mainly if warranty, battery life, and connectivity are what you value most. That is why the final call still favors Aqara Smart Lock U100.
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The biggest differences
Where these two are furthest apart, and by how much.
- Battery Life+75%Eufy Smart Lock E3114 months vs 8 months
- Warranty+50%Eufy Smart Lock E311.5 years vs 1 year
| Feature | Aqara Smart Lock U100 | Eufy Smart Lock E31 | Winner |
|---|---|---|---|
| Rating | 4.1 | 3.9 | Aqara Smart Lock U100 |
| Warranty | 1 year | 1.5 years | Eufy Smart Lock E31 |
| Weather Resistance | IP65 | IP53 | Aqara Smart Lock U100 |
| Battery Life | 8 months | 14 months | Eufy Smart Lock E31 |
| Connectivity | Bluetooth, Zigbee | 2.4 GHz WiFi, Bluetooth, Thread Protocol | Eufy Smart Lock E31 |
| Lock/Unlock System | Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key | Remote, Passcode, Fingerprint, Physical Key | Aqara Smart Lock U100 |
| Price | $149.99 | $149.99 | 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 |
Winner
$149.99
- + Rating: 4.1
- + Weather Resistance: IP65
- + Lock/Unlock System: Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key
- - Warranty: 1 year vs 1.5 years
- - Battery Life: 8 months vs 14 months
$149.99
- + Warranty: 1.5 years
- + Battery Life: 14 months
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Thread Protocol
- - Rating: 3.9 vs 4.1
- - Weather Resistance: IP53 vs IP65
Frequently Asked Questions
Which is better overall: Aqara Smart Lock U100 or Eufy Smart Lock E31?
Aqara Smart Lock U100 has the stronger overall profile in this comparison, especially for rating, weather resistance, and Lock/Unlock system.
What is the biggest difference between Aqara Smart Lock U100 and Eufy Smart Lock E31?
Rating is one of the clearest differences: Aqara Smart Lock U100 lists 4.1, while Eufy Smart Lock E31 lists 3.9.
Which one looks better on price?
Aqara Smart Lock U100 is listed at $149.99, while Eufy Smart Lock E31 is listed at $149.99. Tie.
Who should buy Aqara Smart Lock U100?
Choose Aqara Smart Lock U100 if your priority is rating and weather resistance and that matters more than warranty.
Who should buy Eufy Smart Lock E31?
Choose Eufy Smart Lock E31 if your priority is warranty and battery life and that matters more than rating.
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