Door Locks · Head to head

Eufy FamiLock E32 vs Eufy Smart Lock E31

Full Smart Door Locks comparison in 2026

Updated October 2026
Data from the official Eufy site.
2026 verdict
The Eufy FamiLock E32 is the better pick of these two Eufy fingerprint deadbolts for most doors.
Eufy FamiLock E32
Winner
Eufy FamiLock E32
$139.99$179.9922% OFF
Buy on Amazon USA
It brings the same fingerprint reader, keypad, built-in Wi-Fi, Matter over Thread and Apple Home, Alexa, Google Home and SmartThings support as the Eufy Smart Lock E31, in a newer model that runs on eight AA batteries, so a swap takes seconds and there is no charging routine. The Eufy Smart Lock E31 is the longer-running option, with a built-in 10000mAh pack quoted at about 14 months and USB-C emergency charging, plus a wider auto-lock timer. Choose the Eufy FamiLock E32 if standard batteries and a simpler routine suit you, and the Eufy Smart Lock E31 if you would rather recharge once a year than keep AAs on hand.
vs
News by email

Still comparing? Get what's new by email

New releases and the smart home news worth knowing, in your inbox.

Smart home news and new releases, straight to your inbox

New releases, comparisons and the smart home news worth knowing.

No spam. Unsubscribe in one click.

Your subscription could not be saved. Please try again.
Please enter a valid email address.
Tick the box above to finish signing up.
We couldn't verify you're human. Please try again.
Too many attempts. Please try again in an hour.
Your subscription has been successful.
FeatureEufy FamiLock E32Eufy Smart Lock E31Winner
Price$139.99$144.99Eufy FamiLock E32
Rating4.93.9Eufy FamiLock E32
Battery Life8 months14 monthsEufy Smart Lock E31
Warranty1.5 years1.5 yearsTie
Weather ResistanceIP53IP53Tie
Connectivity2.4 GHz WiFi, Bluetooth, Thread Protocol2.4 GHz WiFi, Bluetooth, Thread ProtocolTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Lock/Unlock SystemRemote, Passcode, Fingerprint, Physical KeyRemote, Passcode, Fingerprint, Physical KeyTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Anti-peep PasswordYESYESTie
Emergency FingerprintNONOTie

What the differences mean

Battery system

The Eufy FamiLock E32 takes eight AA batteries rated for up to eight months and has no backup battery. The Eufy Smart Lock E31 uses a built-in 10000mAh rechargeable pack quoted at about 14 months, with USB-C emergency charging if it runs flat, so one is a battery swap and the other is a charging session.

Auto-lock timing

Both use a countdown timer rather than a door-position sensor, but the range differs. The Eufy FamiLock E32 can be set from 2 seconds to 5 minutes, while the Eufy Smart Lock E31 can run from 1 second to 60 minutes, which suits someone who wants the door to stay unlocked longer after arriving.

Line and generation

The Eufy FamiLock E32 is the newer model, released in 2026 as the entry member of the FamiLock family, while the Eufy Smart Lock E31 dates from 2024. The core feature set is the same: fingerprint, keypad, app, physical key and Matter over Thread.

What both leave out

Neither has a camera, video doorbell, face recognition, NFC, Apple Home Key or a door-position sensor, and both use 2.4 GHz Wi-Fi only. A buyer who wants to see visitors at the door has to look at a different model in either line.

Which one to buy if

What owners say

Owners of the Eufy Smart Lock E31 describe an install that takes five to fifteen minutes on an existing deadbolt and a fingerprint reader they call faster than unlocking a phone. They single out the rechargeable 10000mAh pack with USB-C emergency power, which ends the cycle of buying AA cells, and reliable Siri control through Matter alongside Alexa and Google. Their warnings are the important part: a notable subset report the pack lasting only weeks with light use and dying without a low-battery warning, and they describe support that did not resolve it. Some also mention a motor that is louder than expected, a keyway that cannot be rekeyed, and no door-position sensor, so auto-lock can run with the door open.

Frequently Asked Questions

Which is better overall: Eufy FamiLock E32 or Eufy Smart Lock E31?

The Eufy FamiLock E32 is the better pick for most buyers because it matches the Eufy Smart Lock E31 on fingerprint entry, Matter and ecosystem support while running on standard AA batteries, which is the simpler routine. The Eufy Smart Lock E31 is worth it if you want a rechargeable pack with emergency charging and the longer quoted battery life.

What is the biggest difference between the Eufy FamiLock E32 and the Eufy Smart Lock E31?

The battery. The Eufy FamiLock E32 uses eight AA cells rated for about eight months, while the Eufy Smart Lock E31 uses a built-in 10000mAh rechargeable pack rated for about 14 months with USB-C emergency charging. Everything else, from the fingerprint reader to Matter over Thread, is essentially the same.

Do the Eufy FamiLock E32 and the Eufy Smart Lock E31 work with Apple Home, Alexa and Google Home?

Yes, both work with Apple Home, Alexa, Google Home, SmartThings and Home Assistant through Matter over Thread, and both have built-in Wi-Fi for the eufy app. Each needs a Thread border router, such as a HomePod mini or Apple TV 4K, for the Matter path.

Do the Eufy FamiLock E32 and the Eufy Smart Lock E31 have a fingerprint reader?

Yes, both have a fingerprint reader, a keypad, app control and a physical key. Neither has a camera, video doorbell, face recognition or Apple Home Key.

Who should buy the Eufy FamiLock E32?

Buyers who want a Matter-ready fingerprint deadbolt with no charging routine, who are happy to keep a spare set of AA batteries and do not need a camera or video doorbell.

Who should buy the Eufy Smart Lock E31?

Owners who prefer a rechargeable pack with USB-C emergency charging, want the longest quoted battery life and a longer auto-lock window, and do not mind monitoring the charge.

AmazonOur store on AmazonShop our ideas on AmazonLists of the smart home setups we would put together ourselves, ready to add to your Amazon cart.Shop on Amazon
Full comparison table

Compare all 54 Door Locks side by side

You are looking at two of them. The full table lines up all Door Locks in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 54 Door Locks
  • 55 specs compared
  • 51 filters
Open the full comparison
More Door Locks

Top Door Locks to compare next

54 smart door locks from 14 brands compared: Aqara, Eufy, Nuki, Schlage and more. Unlock methods, battery life, retrofit fit and app support.

All Door Locks
Eufy

More Eufy products

A sharper look at other Eufy products worth comparing.

Explore Eufy
Independent · Not sponsoredBrands never pay for placement or rankings. Affiliate commissions never influence our comparisons.

As an Amazon Associate I earn from qualifying purchases.

CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED ‘AS IS’ AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.

© 2026 Smart Home Compared
Search