10 Best Smart Lock Over Existing Deadbolt 2026 in the United States

The Yale Assure Lock 2 Deadbolt is a smart lock designed for easy installation over existing deadbolts. It offers various ways to unlock the door, including a keypad, voice assistant, auto-unlock, and the Yale Access App, making it versatile for different user preferences. This lock ensures peace of mind with features like Auto-Lock via DoorSense and remote management through the app. However, it's worth noting that this product is only operational within the US and Canada, which could be a limitation for international users.

The security features are robust with two-factor authentication, biometric verification, and a matte keypad to resist fingerprints. Additionally, the lock can be integrated with Apple Home and other smart home systems, making it convenient for users who already have or plan to have a smart home setup. The hands-free voice assistant compatibility with Amazon Alexa, Hey Google, and Siri further enhances convenience. Sharing access is straightforward through the Yale Access App, allowing you to provide unique codes to family and friends and track entry and exit times.

Installation is user-friendly, requiring just a screwdriver and no professional help. One potential drawback is the reliance on battery power, which means you’ll need to monitor and replace batteries periodically. This lock is durable, made from zinc, and fits most standard US entry doors. The Yale Assure Lock 2 Deadbolt is an excellent choice for users looking for a secure, versatile, and easy-to-install smart lock that integrates well with existing smart home systems.

The Schlage Encode Smart Wi-Fi Deadbolt with Camelot Trim in Matte Black offers a robust solution for those seeking to upgrade their existing deadbolt with a smart lock. Key strengths include built-in Wi-Fi for remote access without additional accessories and compatibility with Alexa for voice control. This makes it easy to lock, unlock, and check the status of your door from anywhere, providing added convenience and security.

The lock also supports up to 100 unique access codes via the Schlage Home or Key by Amazon apps, making it simple to manage access for family and friends. The fingerprint-resistant touchscreen and built-in alarm technology enhance security, along with alerts for potential security breaches and low battery warnings. Installation is straightforward with just a screwdriver thanks to the unique snap ‘n stay technology, making it accessible for most users. The lock's matte black finish and rectangular design offer a sleek, modern look that complements various door designs.

It is important to measure your door's dimensions to ensure compatibility. One potential drawback is the reliance on battery power, which necessitates monitoring and periodic replacement, although the lock does offer alerts and smart reordering through Amazon Dash Replenishment. Additionally, while it integrates well with Amazon Alexa, compatibility with other smart home systems like Google Assistant and Vera is available but may not be as seamless. Users who prioritize a smart lock with versatile access management, easy installation, and solid security features will find the Schlage Encode Smart Wi-Fi Deadbolt to be a reliable and user-friendly choice.

The Yale Security Lock 2 Deadbolt is a robust option for those looking to upgrade their traditional deadbolt to a smart lock solution. With its user-friendly features, it excels in compatibility and connectivity, working seamlessly with both Bluetooth and Wi-Fi. This allows users to control the lock remotely through the Yale Access App, making it convenient to lock or unlock the door from anywhere, which can be especially helpful for letting guests in or monitoring access to your home.

One standout feature is the Auto-Lock capability, which ensures that the door locks automatically once it’s closed, adding an extra layer of security. The Auto-Unlock feature is another bonus, as it allows the lock to recognize when you're home and unlock the door without needing to fumble for your keys or phone.

The lock also integrates well within smart home ecosystems, notably supporting Apple HomeKit, Google Assistant, and Amazon Alexa, making it versatile for various users. The ability to create custom access codes for family and guests, alongside tracking who enters and exits, is invaluable for maintaining security. The lock is designed for easy installation without a locksmith, although it still requires some basic DIY skills and relies on batteries (4 AA batteries included), which may need periodic replacement.