Winner
Updated November 2026
Data from the official Eufy site.
2026 verdict
For most buyers in 2026, Eufy FamiLock E40 is the safer pick over Eufy Video Smart Lock S330 because of rating, warranty, and battery life.
The main reason it wins is rating, warranty, and battery life, and connectivity and integrations strengthen that case. Eufy Video Smart Lock S330 is the better fit only for buyers who prioritize its specific feature mix above everything else here. That makes Eufy FamiLock E40 the clearer recommendation in 2026.
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The biggest differences
Where these two are furthest apart, and by how much.
- Warranty+50%Eufy FamiLock E401.5 years vs 1 year
- Battery Life+50%Eufy FamiLock E406 months vs 4 months
| Feature | Eufy FamiLock E40 | Eufy Video Smart Lock S330 | Winner |
|---|---|---|---|
| Rating | 4.6 | 4.1 | Eufy FamiLock E40 |
| Warranty | 1.5 years | 1 year | Eufy FamiLock E40 |
| Battery Life | 6 months | 4 months | Eufy FamiLock E40 |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi | Eufy FamiLock E40 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Home Assistant | Eufy FamiLock E40 |
| Lock/Unlock System | Remote, Bluetooth, Passcode, Fingerprint, Face Recognition, Physical Key | Remote, Passcode, Fingerprint, Apple Home Key, Physical Key | Eufy FamiLock E40 |
| Price | $349.99 | $349.99 | Tie |
| Weather Resistance | IP65 | IP65 | Tie |
| One-Time Password | YES | YES | Tie |
| Periodic Password | YES | YES | Tie |
| Anti-peep Password | YES | YES | Tie |
| Emergency Fingerprint | NO | NO | Tie |
Winner
$349.99
- + Rating: 4.6
- + Warranty: 1.5 years
- + Battery Life: 6 months
$349.99
- - Rating: 4.1 vs 4.6
- - Warranty: 1 year vs 1.5 years
Frequently Asked Questions
Which is better overall: Eufy FamiLock E40 or Eufy Video Smart Lock S330?
Eufy FamiLock E40 has the stronger overall profile in this comparison, especially for rating, warranty, and battery life.
What is the biggest difference between Eufy FamiLock E40 and Eufy Video Smart Lock S330?
Rating is one of the clearest differences: Eufy FamiLock E40 lists 4.6, while Eufy Video Smart Lock S330 lists 4.1.
Which one looks better on price?
Eufy FamiLock E40 is listed at $349.99, while Eufy Video Smart Lock S330 is listed at $349.99. Tie.
Who should buy Eufy FamiLock E40?
Choose Eufy FamiLock E40 if your priority is rating and warranty and that matters more than the competing advantages.
Who should buy Eufy Video Smart Lock S330?
Choose Eufy Video Smart Lock S330 if your priority is its specific strengths and that matters more than rating.
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