The Nuki Smart Lock is the best retrofit smart lock currently available for people who want a minimalist, feature-packed upgrade to their preexisting deadlock. It’s currently selling for $149 at Amazon — its cheapest price ever — during the Big Spring Sale. Its fast unlocking speed, Matter-over-Thread support, and broad smart home compatibility impressed my colleague Jennifer Pattison Tuohy, enough for her to consider it the most advanced model she’s tested in her review.

The Nuki Smart Lock’s pricing history is a bit confusing. It originally launched for $159.99 when we reviewed it in July 2025. Months later, the company raised the cost to $199.99 while addressing some of our major criticisms, namely that a paid subscription ($5.90 per month) was no longer necessary to remotely unlock the Nuki over Wi-Fi, or to receive lock activity notifications. By purchasing one now, you’re getting the best-ever price with all of the features we wish were available at no cost from the beginning.

For what it’s worth, you never needed to pay for the subscription to get access to some of the Nuki Smart Lock’s best features. As mentioned earlier, it supports a Matter-over-Thread connection, which is free to use (assuming you have a Matter hub and a Thread border router) and yields huge battery savings compared to controlling the Nuki Smart Lock solely over Wi-Fi.