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Aqara Smart Lock U200 vs Eufy FamiLock S3 Max

Full Smart Door Locks comparison in 2026

Updated August 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.
FeatureAqara Smart Lock U200Eufy FamiLock S3 MaxWinner
Price$169.99$279.99Aqara Smart Lock U200
Rating2.74.2Eufy FamiLock S3 Max
Warranty1 year1.5 yearsEufy FamiLock S3 Max
Battery Life6 months4 monthsAqara 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
ConnectivityThread Protocol2.4 GHz WiFiTie
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

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.

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