Eufy FamiLock S3 Max vs Eufy Video Smart Lock E330

The Eufy FamiLock S3 Max comes out ahead in this eufy-on-eufy matchup, with a higher owner rating, a longer warranty, tougher IP65 weatherproofing, and Matter-based support for Apple HomeKit and Samsung SmartThings that the Eufy Video Smart Lock E330 does not offer. The E330 counters with a lower price and a longer-lasting battery, so its value depends on how much you need the FamiLock's extra ecosystem reach and palm-vein entry.

Both are eufy deadbolts with a built-in 2K camera and video doorbell recording locally with no subscription, so the core concept is the same. The main split is unlock method and ecosystem: the FamiLock S3 Max adds palm-vein recognition and an interior video screen (a digital peephole) but drops the fingerprint reader, while the E330 keeps a fingerprint reader and Apple Home Key and connects to fewer platforms (no Apple HomeKit, Samsung SmartThings, or Matter).

The Eufy Video Smart Lock E330 is rated for about 8 months per charge, while the Eufy FamiLock S3 Max is rated for around 4 months, so the E330 needs recharging roughly half as often under similar use.

Both do. The Eufy FamiLock S3 Max and the Eufy Video Smart Lock E330 each pack a 2K camera with night vision, motion detection, and a built-in video doorbell that records to local storage with no monthly subscription. The FamiLock stores more locally and adds an interior screen to view the camera feed from inside, a feature the E330 does not include.

Buyers who want eufy's most feature-loaded video lock, including palm-vein entry, an interior digital peephole screen, and broader smart-home support through Matter (Apple HomeKit, Samsung SmartThings), and who can tolerate its documented Wi-Fi and Matter connectivity reports.

Buyers who want the same 2K camera-and-doorbell concept for less money, a longer-lasting battery, and simpler fingerprint plus Apple Home Key entry, without needing Apple HomeKit or Samsung SmartThings support.