Door Locks · Head to head

Eufy FamiLock S3 vs Eufy FamiLock S3 Max

Full Smart Door Locks comparison in 2026

Updated August 2026
Data from Amazon and official Eufy site.
2026 verdict
Eufy FamiLock S3 wins the 2026 matchup against Eufy FamiLock S3 Max, mainly on price. The comparison tilts its way because of price, with its broader overall balance keeping it in front. Choose Eufy FamiLock S3 Max only if rating matters more to you than the broader advantage from Eufy FamiLock S3. As a general recommendation, Eufy FamiLock S3 comes out on top.
vs
FeatureEufy FamiLock S3Eufy FamiLock S3 MaxWinner
Price$299.99$329.99Eufy FamiLock S3
Rating4.14.3Eufy FamiLock S3 Max
Warranty1.5 years1.5 yearsTie
Weather ResistanceIP65IP65Tie
Battery Life4 months4 monthsTie
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Lock/Unlock SystemRemote, Passcode, Physical KeyRemote, Passcode, Physical KeyTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Anti-peep PasswordYESYESTie
Emergency FingerprintNONOTie

Frequently Asked Questions

Which is better overall: Eufy FamiLock S3 or Eufy FamiLock S3 Max?

Eufy FamiLock S3 has the stronger overall profile in this comparison, especially for price.

What is the biggest difference between Eufy FamiLock S3 and Eufy FamiLock S3 Max?

Price is one of the clearest differences: Eufy FamiLock S3 lists $299.99, while Eufy FamiLock S3 Max lists $329.99.

Which one looks better on price?

Eufy FamiLock S3 is listed at $299.99, while Eufy FamiLock S3 Max is listed at $329.99. Eufy FamiLock S3 (better spec).

Who should buy Eufy FamiLock S3?

Choose Eufy FamiLock S3 if your priority is price and that matters more than rating.

Who should buy Eufy FamiLock S3 Max?

Choose Eufy FamiLock S3 Max if your priority is rating and that matters more than price.

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