Eufy Security Smart Lock S230 vs Nuki Smart Lock Go

The Eufy Security Smart Lock S230 comes out ahead overall, with a higher owner rating, weatherproofing the Nuki lacks, and built-in one-time, periodic and anti-peep passwords. The Nuki Smart Lock Go offsets that with a lower price, a longer warranty and far broader smart-home platform support.

Installation type and unlock method. The Eufy Security Smart Lock S230 is a full deadbolt replacement for US-style doors built around a fingerprint reader, while the Nuki Smart Lock Go is a European cylinder retrofit that mounts over your existing lock in minutes and can auto-unlock by geolocation as you approach, though it has no fingerprint reader of its own.

The Eufy Security Smart Lock S230. It includes one-time, periodic and anti-peep passwords directly in the lock, while the Nuki Smart Lock Go needs its separate Keypad accessory just to enter a passcode at all, and it has no anti-peep option.

The Nuki Smart Lock Go, which reaches Apple HomeKit, Google Home, Alexa, Samsung SmartThings, Home Assistant and Matter over Thread. The Eufy Security Smart Lock S230 covers Google Home and Alexa only.

Buyers with a US-style deadbolt who want a weatherproof, fingerprint-first lock with built-in guest codes and no need for extra accessories.

Buyers with a European cylinder door, especially renters, who want an easy retrofit, geolocation auto-unlock, and the widest possible smart-home compatibility, and who don't mind paying for the Keypad accessory to get code or fingerprint entry.