Nuki Smart Lock Ultra vs Schlage Arrive

The flagship contender in this smart lock matchup is the Nuki Smart Lock Ultra, and it shows in the numbers that matter for connected-home reach: more connectivity radios, more platform integrations and a deeper unlock system than the Schlage Arrive offers. It packs Wi-Fi, Bluetooth and Thread with Matter, plugs natively into Google Home, Alexa, Apple HomeKit, SmartThings and Home Assistant, and adds one-time and periodic guest passwords once its optional Keypad is attached. The Schlage Arrive pushes back with a three-year warranty against the Ultra's two years and a physical keypad built into the lock rather than sold as an accessory, though its own platform support stops at Google Home and Alexa. Both are hands-free at the door, the Ultra through geolocation auto-unlock, the Arrive through auto-lock with a selectable delay, and both keep a mechanical key as backup. Smart-home enthusiasts on a European door who want Nuki's fastest, most connected lock should choose the Nuki Smart Lock Ultra, while anyone who wants a complete US deadbolt with buttons in the box and a longer warranty should pick the Schlage Arrive.