Best Smart Locks: Buyer’s Guide (2026)

For most households, the Yale Assure Lock 2 is the safest all-round smart lock choice, the Schlage Encode Plus suits Apple Home users who want a Grade 1 keypad deadbolt, the August Wi-Fi suits renters who cannot swap hardware, the Aqara U-series suits buyers who want Matter and Thread at a value tier, and the Level Lock+ suits people who want the lock to disappear into the door. The right choice depends on your door, your smart-home ecosystem, and whether you want keys, a keypad, a fingerprint reader or all three.

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Smart locks at a glance

How smart locks differ

Replacement deadbolts versus retrofits

A full replacement lock, like the Yale or Schlage, swaps your deadbolt for a new one with its own cylinder, keypad and electronics. That gives you a fresh, tested lock body and usually more entry options. A retrofit, like the August or Level, keeps your existing deadbolt and replaces only the inside thumb-turn or mechanism. This is gentler on the door, friendlier to renters, and keeps your existing keys, but your physical security is still only as good as the cylinder you already own.

Connectivity

Bluetooth-only locks work near the door and use a phone app. Wi-Fi locks such as the Encode Plus and August Wi-Fi let you check and control the lock remotely without a separate bridge, at the cost of more battery drain. Thread and Matter, found on the Aqara, Level and newer Yale models, aim to work with Apple, Google and Alexa ecosystems and keep working locally without the cloud. Matter support can vary by firmware and region, so read the maker’s current compatibility page.

Entry methods

Options include a physical key, a numeric keypad, fingerprint, phone proximity and Apple Home Key. Keypads are the most practical for family, guests and short-term codes. Fingerprint readers are fast for daily use but are usually backed up by a code or key. Always keep a way to open the door if batteries die; most models offer a key or an external terminal for an emergency battery.

Model notes

Yale Assure Lock 2

Reviewers at Tom’s Guide and Product Review Crew place it first for general households. It comes in multiple finishes and versions, including keypad and touchscreen, and a choice of connectivity modules. Roundups cite DoorSense, which reports whether the door is closed, and a large number of user codes. Because versions differ, confirm which module and protocol is in the box.

Schlage Encode Plus

A BestPick review calls it the most secure US smart lock it covered, citing Grade 1 certification and no hub requirement, and TheSmartestGear recommends it for Apple Home households. If you already live in the Apple ecosystem, Home Key lets you tap an iPhone or Apple Watch to unlock. It sits in the premium tier, so it is best for buyers who value that integration.

August Wi-Fi (4th generation)

This is the usual renter’s choice because it mounts over your existing thumb-turn and leaves the exterior key cylinder untouched. Reviewers praise how quickly it installs. The trade-off is highlighted by one reviewer’s bump-key result: since your original cylinder remains, an old or low-quality cylinder is a weak point. Consider upgrading the cylinder if you own the door.

Aqara U100, U200, U400

Aqara pushes aggressive value with Thread and Matter support. TheSmartestGear names the U200 its best-value pick, and Product Review Crew ranks the U400 as a strong next-generation lock. The U100 attracts families who want fingerprint entry but, per reviewers, needs an Aqara hub for Matter. Because the line has several overlapping models, compare the spec sheets before buying.

Level Lock+

The Level Lock+ hides its hardware inside the door and looks like an ordinary lock from outside. Roundups recommend it for buyers with an HOA, historic district or strong design preferences. Reviewers note a higher cost and that some functions depend on accessories.

Fit and compatibility

• Door thickness and prep: measure door thickness, bore hole size and backset, and compare with the maker’s listed range.
• Existing deadbolt: retrofit locks need a compatible deadbolt shape; check the maker’s compatibility list.
• Handing and clearance: some interior units need clearance from door trim or storm door handles.
• Power: most use AA or similar batteries; check the stated battery life and low-battery warnings.
• Ecosystem: match your hub or platform (Apple Home, Google Home, Alexa, SmartThings) to the lock’s supported protocols.

Security and safety notes

Look for an ANSI/BHMA grade; Grade 1 is the highest residential rating for lock strength. Use unique codes and remove old ones after guests or contractors leave. Keep firmware updated, set a strong password on the account and enable two-factor authentication where offered. Fire codes can require that a door can be opened from inside without a key, so confirm any lock you install allows this, and ask a licensed locksmith if unsure.

Budget tiers

• Budget: Bluetooth keypad deadbolts and entry-level Aqara models. Good for basic code entry.
• Mid-range: Yale Assure Lock 2, August Wi-Fi and Aqara U200, covering Wi-Fi or Matter connectivity.
• Premium: Schlage Encode Plus and Level Lock+, aimed at certified strength or design.

Pick X if …

Alternatives

• Nest x Yale: Security.org names it best overall in its list; worth a look if you use Google Home.
• Keypad-only deadbolts without Wi-Fi: fewer features but simpler and long-lasting batteries.
• Smart garage and door controllers: useful if you only need remote status.

Installation and daily-use tips

Most replacement locks install with a screwdriver in under an hour on a standard prepared door, and retrofit locks are often quicker. Before you start, read the maker’s installation guide, confirm that the door is not warped, and make sure the bolt moves freely by hand. A lock that binds in the door frame will drain batteries faster and may fail to throw fully, regardless of how good the electronics are.

When setting up codes, create a separate code for each regular user so that you can remove one without disrupting others. Use temporary codes for cleaners, contractors or guests, and set expiry dates where the app supports them. Enable activity logs if you want to see who came and went, and consider auto-lock only after you have tested that it will not lock you out when carrying groceries or taking out the trash.

Batteries, weather and reliability

Battery life varies widely with connectivity. Wi-Fi models tend to use more power than Bluetooth or Thread models, and cold weather reduces battery capacity. Makers usually specify a lifetime in months under typical use, so treat it as a guide rather than a promise. Replace batteries when the lock first warns you, and use the battery type the maker specifies. If your door is exposed to rain or direct sun, look for stated weather ratings and finishes designed for outdoor exposure.

Privacy and data

Cloud-connected locks send events to a company server. Read the privacy policy, decide whether you are comfortable with activity logs being stored, and look at whether the lock offers local control through Matter or Thread. Many owners reduce risk by limiting which family members can create codes, removing stale users, and keeping the lock’s firmware updated through the official app.

Common mistakes buyers make

• Buying a lock without measuring door thickness, bore and backset.
• Assuming a retrofit upgrades the strength of the existing cylinder.
• Skipping a key backup and getting locked out when the batteries die.
• Picking a lock that does not match the home’s ecosystem, then finding key features unavailable.
• Forgetting to remove codes after a tenant, contractor or guest leaves.

Frequently Asked Questions

Can a smart lock be hacked?

Any connected device carries some risk. Choose a maker that publishes security updates, use unique codes and two-factor authentication, and prefer locks with a certified mechanical grade so physical strength is not the weak link.

What happens when the batteries die?

Most locks give low-battery warnings well ahead of time and provide a key override or a terminal for an emergency battery. Keep spare batteries and know your lock’s backup method.

Do smart locks work without Wi-Fi?

Keypads and keys work locally on all of them. Remote control and notifications need Wi-Fi, a bridge, or a Thread and Matter hub depending on the model.

Will a smart lock fit my existing door?

Most standard doors with a normal bore and backset work. Measure the door and compare with the maker’s range, and read compatibility notes for retrofit locks.

Are retrofit locks less secure?

They keep your existing cylinder, so the physical resistance is the same as before. If your current cylinder is basic, upgrading it can improve security.

Is Matter worth caring about?

If you use more than one smart-home platform, yes, because Matter aims for cross-platform control. Support varies by model and firmware, so check the maker’s compatibility list.