Live nowPrime Day 2026October 6 to 7, 2026Starts in05d09h51m54sSee the deals
Door Locks · Head to head

Aqara Smart Lock U200 vs Eufy FamiLock S3 Max

Full Smart Door Locks comparison in 2026

Updated September 2026
Data from Amazon and official Aqara and Eufy sites.
2026 verdict
Aqara Smart Lock U200 wins on price, battery life, integrations and unlock methods.
It costs less, runs about 6 months per charge versus 4, connects natively to all seven major platforms including IFTTT and Matter over Thread, and offers more ways in: fingerprint, NFC, Apple Home Key, keypad, app and physical key. Eufy FamiLock S3 Max answers with a higher owner rating, an 18-month warranty, and a category of its own: a built-in 2K HDR video doorbell with camera, 16GB of local storage and a rear screen that works as a digital peephole, plus palm-vein recognition and built-in Wi-Fi needing no hub. Both auto-lock and offer one-time, periodic and anti-peep passwords. As a pure smart lock, the Aqara Smart Lock U200 is the better value; as a lock-doorbell-camera combo, the Eufy stands alone.
vs
Price alerts

Door Lock prices change while you decide

We check the price of every Door Lock in the catalog daily and email you the drops, whichever one you pick.

Smart home deals and news, straight to your inbox

Price drops, new releases 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.
Your subscription has been successful.
FeatureAqara Smart Lock U200Eufy FamiLock S3 MaxWinner
Price$169.99$329.99Aqara Smart Lock U200
Rating2.74.2Eufy FamiLock S3 Max
Warranty1 year1.5 yearsEufy FamiLock S3 Max
Battery Life6 months4 monthsAqara Smart Lock U200
ConnectivityBluetooth, Thread Protocol2.4 GHz WiFiAqara Smart Lock U200
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Passcode, Physical KeyAqara Smart Lock U200
DoorbellNOYESEufy FamiLock S3 Max
Weather ResistanceIPX5IP65Tie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Anti-peep PasswordYESYESTie

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Aqara Smart Lock U200
  • Eufy FamiLock S3 Max

Loading price history...

Frequently Asked Questions

Which is better overall: Aqara Smart Lock U200 or Eufy FamiLock S3 Max?

Aqara Smart Lock U200 wins with its lower price, longer battery life, native seven-platform support and richer unlock methods including Apple Home Key and fingerprint. Eufy FamiLock S3 Max counters with a higher rating, longer warranty and its integrated video doorbell and camera.

What is the biggest difference between Aqara Smart Lock U200 and Eufy FamiLock S3 Max?

The camera. The Eufy packs a 2K HDR video doorbell, night vision, motion detection, local storage and an interior viewing screen into the lock itself. The Aqara is a focused smart lock with no video features but more unlock options.

How do they connect to smart homes?

The Aqara Smart Lock U200 uses Matter over Thread (a Thread border router is required) and reaches every platform natively, including IFTTT. The Eufy FamiLock S3 Max has built-in Wi-Fi, no hub needed, and reaches Google, Alexa, HomeKit and SmartThings via Matter.

Which unlock methods does each support?

The Aqara Smart Lock U200: fingerprint, keypad, NFC, Apple Home Key, app, and physical key. The Eufy FamiLock S3 Max: palm-vein recognition, keypad, app, and physical key, with no fingerprint, NFC or Home Key.

Who should buy Aqara Smart Lock U200?

Choose Aqara Smart Lock U200 for the best-connected retrofit deadbolt at a lower price, especially in Apple Home where Home Key shines. Some owners report calibration quirks and mechanical wear over time.

Who should buy Eufy FamiLock S3 Max?

Choose Eufy FamiLock S3 Max to replace lock, doorbell and porch camera with one device: palm unlock that works in rain, 2K video with no monthly fee, and a rear screen ideal for kids and elderly family, backed by an 18-month warranty.

Full comparison table

Compare all 46 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.

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

Top Door Locks to compare next

46 smart door locks from 13 brands compared: Aqara, Eufy, Nuki, Schlage and more. Unlock methods, battery life, retrofit fit and app support.

All Door Locks
Aqara

More Aqara products

A sharper look at other Aqara products worth comparing.

Explore Aqara
Eufy

More Eufy products

A sharper look at other Eufy products worth comparing.

Explore Eufy