10% OFF
$359.99
$399.99
Updated November 2026
Data from the official Eufy and Nuki sites.
2026 verdict
For a European cylinder door, the Nuki Smart Lock Pro is the smarter smart lock of the two: better reviewed, cheaper, longer warranted and easier on its battery.
It is rated about 6 months per charge against 4, carries a 2-year warranty against 18 months, and adds Bluetooth and Thread to the Wi-Fi it shares with the Eufy FamiLock S3 Max, with remote access included. The Eufy FamiLock S3 Max still owns a different category: an IP65 build, palm-vein entry, one-time, periodic and anti-peep passwords, and a 2K HDR video doorbell with 16GB of local storage and a rear viewing screen. Both reach Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter. Pick the Nuki Smart Lock Pro for a discreet retrofit with hands-free auto-unlock, and the Eufy FamiLock S3 Max if lock, doorbell and camera should be one unit.
Connectivity
- Wi-Fi 2.4 GHz
vs
Winner
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The biggest differences
Where these two are furthest apart, and by how much.
- Battery Life+50%Nuki Smart Lock Pro6 months vs 4 months
- Warranty+33%Nuki Smart Lock Pro2 years vs 1.5 years
| Feature | Eufy FamiLock S3 Max | Nuki Smart Lock Pro | Winner |
|---|---|---|---|
| Warranty | 1.5 years | 2 years | Nuki Smart Lock Pro |
| Weather Resistance | IP65 | NO | Eufy FamiLock S3 Max |
| Battery Life | 4 months | 6 months | Nuki Smart Lock Pro |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi, Bluetooth, Thread Protocol | Nuki Smart Lock Pro |
| Lock/Unlock System | Remote, Passcode, Physical Key | Remote, Bluetooth, Passcode, Fingerprint, Physical Key | Nuki Smart Lock Pro |
| One-Time Password | YES | Keypad required | Eufy FamiLock S3 Max |
| Periodic Password | YES | Keypad required | Eufy FamiLock S3 Max |
| Anti-peep Password | YES | NO | Eufy FamiLock S3 Max |
| Doorbell | YES | NO | Eufy FamiLock S3 Max |
| Rating | 4.3 | 4.3 | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| Emergency Fingerprint | NO | NO | Tie |
What the differences mean
Video doorbell and camera
The Eufy FamiLock S3 Max is lock, 2K HDR doorbell, camera and digital peephole in one unit, with 16GB of storage and no subscription. The Nuki Smart Lock Pro has no camera at all, so a doorbell or camera would be a separate purchase.
Weather rating
The Eufy FamiLock S3 Max is rated IP65 and sits on the outside of the door. The Nuki Smart Lock Pro is an interior-only motor with no weather rating, which matters little because it is mounted on the inside.
Guest codes
The Eufy FamiLock S3 Max builds in one-time, periodic and anti-peep passwords. On the Nuki Smart Lock Pro, codes and fingerprints need its separate keypad accessories.
Battery and warranty
The Nuki Smart Lock Pro is rated for about 6 months per charge with a 2-year warranty. The Eufy FamiLock S3 Max is rated for about 4 months, has 4 AAA backup batteries and carries an 18-month warranty.
How they connect
Both have 2.4 GHz Wi-Fi with remote access built in. The Nuki Smart Lock Pro adds Bluetooth and Thread (with a Thread border router), which is how its auto-unlock and Matter path work.
Which one to buy if
- you want the lock, the doorbell and the camera in one device
Only the Eufy FamiLock S3 Max has a built-in 2K camera, doorbell and rear screen.
- your door has a European cylinder and you want a discreet retrofit
The Nuki Smart Lock Pro mounts over the existing cylinder in minutes and keeps your key.
- you want the door to unlock as you arrive with full hands
The Nuki Smart Lock Pro lists geolocation auto-unlock and Bluetooth, which the Eufy FamiLock S3 Max does not.
- you rent out the door and want guest codes without extra accessories
The Eufy FamiLock S3 Max has one-time, periodic and anti-peep passwords built in.
10% OFF
$359.99
$399.99
- + Weather Resistance: IP65
- + One-Time Password: YES
- + Periodic Password: YES
- - Warranty: 1.5 years vs 2 years
- - Battery Life: 4 months vs 6 months
Winner
- + Warranty: 2 years
- + Battery Life: 6 months
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Thread Protocol
- - Weather Resistance: NO vs IP65
- - One-Time Password: Keypad required vs YES
What owners say
Owners of both locks like how they fit into a smart home, and both groups also bring up battery trouble, so neither is free of it. Nuki Smart Lock Pro owners single out how quickly it installs, the strong motor, hands-free auto-unlock when they arrive with full hands and the Wi-Fi that no longer costs extra as it did on the Go; their complaints are the price once a keypad is added, a battery that stopped charging for a few and a cylinder that has to protrude. Eufy FamiLock S3 Max owners call the palm reader fast even in rain and love the local video and the interior screen for kids and older relatives, but report unstable Wi-Fi and Matter errors, slow charging, cold-weather drain and slow support.
Frequently Asked Questions
Which is better overall: Eufy FamiLock S3 Max or Nuki Smart Lock Pro?
The Nuki Smart Lock Pro comes out ahead on price, owner rating, warranty, battery life and connectivity. The Eufy FamiLock S3 Max wins on weather resistance, guest passwords and its built-in video doorbell and camera.
What is the biggest difference between Eufy FamiLock S3 Max and Nuki Smart Lock Pro?
All-in-one versus minimalist. The Eufy FamiLock S3 Max is lock, doorbell, camera and digital peephole in one exterior-facing unit. The Nuki Smart Lock Pro is an interior-only motor over your existing cylinder, discreet and quick to fit, with keypad and fingerprint as paid accessories.
How do entry methods compare?
The Eufy FamiLock S3 Max: palm-vein recognition, keypad, app and physical key. The Nuki Smart Lock Pro: phone, watch and geolocation auto-unlock natively, with keypad or fingerprint entry requiring the accessory keypads.
Is remote access included on the Nuki Smart Lock Pro?
Yes. The Nuki Smart Lock Pro has built-in Wi-Fi with remote access included, like the Eufy FamiLock S3 Max, so neither needs a bridge or a paid add-on for it.
Who should buy Eufy FamiLock S3 Max?
Choose Eufy FamiLock S3 Max to replace lock, doorbell and camera in one weather-sealed device with palm entry, local video without fees and a family-friendly rear screen.
Who should buy Nuki Smart Lock Pro?
Choose Nuki Smart Lock Pro for a discreet, premium European-cylinder retrofit with built-in Wi-Fi, a fast motor, hands-free auto-unlock and a 2-year warranty.
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