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The Nuki Smart Lock<\/strong> is the best retrofit smart lock currently available for people who want a minimalist, feature-packed upgrade to their preexisting deadlock. It\u2019s currently selling for $149 at Amazon<\/a> \u2014 its cheapest price ever \u2014 during the Big Spring Sale<\/a>. 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\u2019s tested in her review<\/a>.<\/p>\n<\/div>\n The Nuki Smart Lock\u2019s 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\u2019re getting the best-ever price with all of the features we wish were available at no cost from the beginning.<\/p>\n<\/div>\n For what it\u2019s worth, you never <\/em>needed to pay for the subscription to get access to some of the Nuki Smart Lock\u2019s 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.<\/p>\n<\/div>\n