The best smart locks of 2026 for keyless entry

Usually yes: retrofit smart locks such as Nuki clamp onto the inside of a euro cylinder, the lock type found on many European doors. Most Canadian exterior doors use a deadbolt instead, so check that the model you're considering is made for your type of lock. On a euro cylinder, check that it sticks out enough on the inside and has an emergency function, so a key still works from outside while the lock's own key stays in. On many multi-point doors you must lift the handle before the key will turn, which a retrofit lock can't do, so check compatibility first.

It can: some home insurance policies set requirements for the locks on exterior doors, such as a deadbolt or multi-point locking, and a smart lock on its own may not match that wording. Check your policy's security conditions before replacing anything. Retrofit models that turn your existing key leave the insured lock in place, which avoids the problem. Also check whether theft without forced entry is covered, since entry with a shared code leaves no trace.

Usually only with your landlord's permission, as many leases forbid changing or adding locks without consent. A retrofit model that clamps onto the inside of the existing lock, with no drilling, is the easiest to agree on, because it comes off without a trace when you move out. If the lock itself has to change, keep the original to put back later and give the landlord a key to the new one.

For a family, a keypad is the most practical: no phone needed, and you can give temporary codes to cleaners, dog walkers or guests. Fingerprint readers are quick but can struggle with wet or cold fingers, so pick one that also has a keypad. App-only locks suit people who always carry a phone, ideally with auto-unlock as you arrive. Whatever you choose, keep a mechanical key or an emergency power option for when the batteries die.

Expect anywhere from a few months to around a year, depending on how often the door is used and whether the lock stays connected over Wi-Fi. Bluetooth-only locks, or those using a Thread or Zigbee bridge, generally last longer than models with built-in Wi-Fi. The app warns you when batteries run low, and keypad models often have emergency contacts for a 9 V battery or USB power from outside. Rechargeable packs are convenient, but a spare avoids downtime while one charges.