Door Locks · Head to head

Eufy FamiLock S3 Max vs Nuki Smart Lock Ultra

Full Smart Door Locks comparison in 2026

Updated June 2026
Data from Amazon and official Eufy and Nuki sites.
2026 verdict
In 2026, the recommendation leans toward Nuki Smart Lock Ultra over Eufy FamiLock S3 Max, driven by rating, warranty, and battery life. What pushes it ahead is rating, warranty, and battery life, and connectivity and integrations keeps the advantage from looking narrow. Choose Eufy FamiLock S3 Max only if price, weather resistance, and doorbell matters more to you than the broader advantage from Nuki Smart Lock Ultra. In practical terms, Nuki Smart Lock Ultra is the easier product to recommend.
vs
FeatureEufy FamiLock S3 MaxNuki Smart Lock UltraWinner
Price$279.98€349.00Eufy FamiLock S3 Max
Rating4.44.5Nuki Smart Lock Ultra
Warranty18 months2 yearsNuki Smart Lock Ultra
Weather ResistanceIP65NOEufy FamiLock S3 Max
Battery Life4 months6 monthsNuki Smart Lock Ultra
Connectivity2.4 GHz WiFi2.4 GHz WiFi, Bluetooth, Thread ProtocolNuki Smart Lock Ultra
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterNuki Smart Lock Ultra
Lock/Unlock SystemRemote, Passcode, Physical KeyRemote, Bluetooth, Passcode, Fingerprint, Physical KeyNuki Smart Lock Ultra
One-Time PasswordNOKeypad requiredNuki Smart Lock Ultra
Periodic PasswordNOKeypad requiredNuki Smart Lock Ultra
DoorbellYESNOEufy FamiLock S3 Max
Anti-peep PasswordNONOTie

Frequently Asked Questions (FAQ)

Which is better overall: Eufy FamiLock S3 Max or Nuki Smart Lock Ultra?
Nuki Smart Lock Ultra has the stronger overall profile in this comparison, especially for rating, warranty, and battery life.
What is the biggest difference between Eufy FamiLock S3 Max and Nuki Smart Lock Ultra?
Price is one of the clearest differences: Eufy FamiLock S3 Max lists $279.98, while Nuki Smart Lock Ultra lists €349.00.
Which one looks better on price?
Eufy FamiLock S3 Max is listed at $279.98, while Nuki Smart Lock Ultra is listed at €349.00. Eufy FamiLock S3 Max (better spec).
Who should buy Eufy FamiLock S3 Max?
Choose Eufy FamiLock S3 Max if your priority is price and weather resistance and that matters more than rating.
Who should buy Nuki Smart Lock Ultra?
Choose Nuki Smart Lock Ultra if your priority is rating and warranty and that matters more than price.
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