Is a smart lock actually more secure than a traditional deadbolt?

For most homes, a reputable smart lock with local fingerprint storage and a backup physical key is at least as secure as a traditional deadbolt, and considerably more convenient day to day. The security question isn't really about the lock mechanism itself, most smart locks use the same physical bolt as a traditional lock, sometimes the exact same certified hardware, it's about what changes once you add fingerprint, code, and app-based access.

Where smart locks genuinely improve security

No more spare keys hidden under mats or given to a cleaner and never collected back, a surprisingly common real-world security gap with traditional locks that people rarely think about until it's pointed out. Auto-lock means a door left unlocked by accident locks itself, removing a common human error entirely. Access logs mean you actually know when the door was opened and by whom, something a traditional lock can never tell you, useful both for security and simply for household coordination.

Where the real risks are

The weak point is almost always the app account, not the lock. A weak password or a phone left logged in and unattended is a bigger risk than the lock mechanism itself. Good smart locks also keep fingerprint data encrypted locally rather than sending it to the cloud, worth checking before you buy, since this affects both privacy and what's actually exposed if an account were ever compromised.

The power and connectivity question

A reasonable concern is what happens if the lock's battery dies or WiFi goes down. Quality smart locks address this with local fingerprint, keypad, and physical key access that all work independently of WiFi or the cloud, plus low-battery notifications well ahead of time and often an external power option (a 9V terminal or USB-C) as a backup. A smart lock without these safeguards is worth avoiding, but they're standard on reputable models.

What to actually check before buying one

Whether fingerprint and access data are stored locally on the device or sent to the cloud, whether the lock works fully without an internet connection (fingerprint, keypad, physical key should all be independent of WiFi), and whether the manufacturer has a track record of security updates, similar to how you'd evaluate any other connected device with real stakes attached to it failing.

Our take

"For most homes, a reputable smart lock with local fingerprint storage and a backup physical key is at least as secure as a traditional deadbolt, and considerably more convenient day to day. I install with a physical key backup as standard regardless of which lock you choose, so a dead battery or connectivity issue is never actually a lockout," says Mustafa Husain, Founder of SAS4HomeIT.