Eufy Security Smart Lock S230 vs Nuki Smart Lock Pro

The Eufy Security Smart Lock S230 wins this matchup, combining a lower price with tougher weather resistance, longer battery life and built-in guest passwords. The Nuki Smart Lock Pro closes the gap with a longer warranty and much broader smart-home platform support.

Door type and unlock method. The Eufy Security Smart Lock S230 is a full deadbolt for US-style doors built around a fingerprint reader, while the Nuki Smart Lock Pro is a European cylinder retrofit with built-in Wi-Fi and hands-free geolocation auto-unlock, but no fingerprint reader of its own.

The Nuki Smart Lock Pro, whose warranty runs longer than the Eufy Security Smart Lock S230's.

Yes. The Nuki Smart Lock Pro needs its separate Keypad or Keypad 2 accessory for passcode or fingerprint entry, and even then it has no anti-peep password option. The Eufy Security Smart Lock S230 builds a keypad, fingerprint reader, and one-time, periodic and anti-peep passwords into the lock itself.

Buyers on a US-style deadbolt who want a weatherproof, fingerprint-first lock with every guest-code option built in, without paying extra for accessories.

Buyers with a European cylinder door who want a premium retrofit with built-in Wi-Fi, hands-free auto-unlock and the widest smart-home platform support, and who don't mind adding the Keypad accessory for code or fingerprint entry.