With the ability to improve the convenience and security of your entryway, a smart lock is arguably the most important part of a connected home. From fully installed models that replace your existing deadbolt to retrofit solutions for tenants, there are plenty of options to choose from. At Sintronictech, we’ve been testing smart locks since they first hit the market. We review all of the most popular models, installing and testing them in our own homes to help you decide which one to buy. With an excellent 4.5-star rating and an Editors’ Choice award, the Ultraloq Bolt Fingerprint is the best smart lock overall for its reliability and versatility. If it’s not right for your home, we’ve got a range of great alternatives, all of which have passed rigorous, hands-on testing to earn our stamp of approval.