After spending more than 2,500 hours testing smart locks and other smart home security devices, our pick for the best smart lock of 2019 is the August Smart Lock 3rd Generation. It’s easy to install, feature-rich, and it works with most voice assistants.
While the August Smart Lock 3rd Gen is our top pick, there are other excellent options available. We also included our picks for the best smart lock for Google Home, the best smart lock for Apple HomeKit, the best smart lock for Alexa, and the best smart lock for Airbnb.
Best smart locks at a glance:
- The best smart lock: August Smart Lock Third Generation
- The best smart lock for Google Home: Nest X Yale
- The best smart lock for HomeKit: Yale Assure SL
- The best smart lock for Alexa: Schlage Smart Sense Deadbolt
- The best smart lock for Airbnb: August Smart Lock Pro + Connect
Why should you buy this: This lock is sleek, secure, and easy to use.
Who’s it for: Those who want no-muss, no-fuss installation and functionality.
Why we picked the August Smart Lock Third Generation:
This latest iteration of the August Smart Lock has a lower cost than previous models and also boasts a new, slinkier industrial design. It fits over the interior side of your existing deadbolt and includes a traditional thumb turn to lock and unlock the door.
The lock is slimmer and taller than previous models, which works much better on doors with glaze panels. Plus, it’s made with all the high-quality materials we’ve come to expect from August. It can support Wi-Fi, HomeKit, Bluetooth, Amazon Alexa, and Z-Wave straight out of the box.
Unlike competing locks that require you to replace your existing lock, August Smart Locks install over a standard deadlock on the interior of the door. That means you can use a traditional set of keys to unlock your door or August’s beautifully-designed, easy-to-use app. Installation time takes about 15 minutes if you have the right tools in front of you and an extra set of hands to help.
Our full August Smart Lock review
Why should you buy this: You don’t have to worry about losing your house key because the Nest X Yale uses a keypad and no physical key.
Who’s it for: Those who want a smart lock that works seamlessly with Google Assistant.
Why we picked the Nest X Yale:
This attractive smart lock is a product of Nest and Yale. An elegant touchscreen keypad replaces the regular old lock and key mechanism, and the exterior surround comes in satin nickel, oil rubbed bronze, or polished brass. The oval-shaped outside keypad is 4.59 inches tall by 2.59 inches wide, while the interior lock is 7.03 inches tall by 2.78 inches wide. Four AA batteries power the lock, and the batteries should last about one year before you have to replace them.
You choose a passcode (between four and eight digits) to unlock the door, and you can also use the app. Additionally, the Nest X Yale has an automatic locking feature which activates after a time you select, and it has a home/away feature that locks the door automatically. Google Home users can voice control the Nest X Yale. You can check the status of your lock from the road, lock your door when you’re not home, and add your lock commands to Google Routines.
The Nest X Yale is not the most feature rich lock on the market. However, the features it has work well, and it incorporates very well into a smart home run by Google Assistant.
Our full Nest X Yale review
Why should you buy this: This lock is extremely attractive and easy to use.
Who’s it for: Those who want a sleek-looking device on their front door
Why we picked the Yale Assure SL:
No matter how smart it is, most people won’t be excited about a new door lock. Locks are functional, utilitarian, and often bulky. But the Yale Assure SL smart lock is different. With its sleek, smooth onyx face and small footprint, this lock is a stylish device that you’ll admire every time you walk through your front door.
The lock is perfect for those seeking a simplified yet elegant looking lock that, when paired with a Network Module, works with Apple HomeKit. You can tell Siri to lock and unlock your door, plus you can use the app to manage pin codes and receive notifications.
The device comes in brushed silver, polished brass or oil-rubbed bronze and features a numeric keypad that illuminates when you press the bottom left corner. The keypad is easily visible even in bright sunlight or at night. When no one is punching numbers on the keypad, the numbers disappear, and it’s just a gleaming onyx facade. Overall, it’s an attractive lock that will make your front door better looking.
Our full Yale Assure SL review
Why should you buy this: Schlage is a 100-year-old company with a reputation for excellent hardware.
Who’s it for: Those who want solid hardware with voice assistant compatibility
Why we picked the Schlage Smart Sense Deadbolt:
Schlage has been around for quite some time — well before there was such a thing as a smart lock. But Schlage has now evolved into one of the best smart lock makers in the biz. The Schlage Sense Smart Deadbolt isn’t just a great piece of old-school hardware, it’s also a device that works well with Alexa.
The device works with Apple HomeKit and Amazon Alexa, where you can use your voice to lock the door. You’ll need the Schlage Sense Wi-Fi adapter in order to use the app, but there’s no monthly fee required.
You can create up to 30 unique access codes that you can program to use for a restricted time periods if you wish or with a certain person. Overall, the device is a snap to set up and a snap to use.
Why should you buy this: This lock comes with a Wi-Fi bridge that supports several connections and includes a well-designed app
Who’s it for: Those looking for an app that controls your lock from anywhere, as well as virtual keys to provide to guests
Why we picked the August Smart Lock Pro + Connect:
The August Smart Lock Pro could be one of the most advanced smart locks on the market. When bundled with the August Connect Wi-Fi Bridge, it can support HomeKit, Bluetooth, and Z-Wave Plus connections. The enhancements allow the Pro to communicate with a wealth of smart home devices (for example, switching off your thermostat when you leave for work).
The device also includes auto-unlock, smartphone control, and virtual keys. A new feature called DoorSense involves a sensor that can tell when your door is open or closed and alert you how long it’s been open. It can also tell you if someone has forced it open.
Perhaps one of the best things about the Pro, though, is the app. It’s ridiculously easy to use, with a huge button facilitating a one-tap lock or unlock of your door. It’s red when the door is locked, and green when it’s open. It’s the kind of simplicity busy households deserve.
Our full August Smart Lock review
Research and buying tips
- Can I install a smart lock myself?
- Can Alexa or Google Assistant control smart locks?
- Can someone hack my smart lock?
- Do smart locks also work with a key?
- Can smart locks work with geofencing?
- Do I need a smart doorbell with my smart lock?
- Does a smart lock require a smart home hub?
- What’s the best platform to buy into — Ring, Nest, or another?
This depends on the smart lock you purchase and your DIY skills. Some locks, like the August Smart Lock, retrofit over your existing deadbolt, which makes them incredibly easy to install in about 10 minutes. Other locks require a bit more effort, but you can probably self-install if you’re handy with a screwdriver and hammer. The Kwikset Kevo Convert is an example. You’ll need a few tools, but you can get the job done in less than an hour. You just need to pop off your old deadbolt and replace it with the Kwikset Lock. On the other end of the spectrum, some smart locks, like Schlage Sense, have a more complicated installation process.
Smart locks typically have a corresponding app, which is compatible with Alexa, HomeKit, and/or one of the other voice assistants. This allows you to use voice commands like, “Alexa, lock the door,” or “Alexa, is my door locked.” To find out specific voice assistant compatibility, visit the manufacturer’s website.
As with any Wi-Fi connected device, there’s always a small risk the device will be hacked if the user doesn’t take steps to protect themselves. However, there’s also a risk that someone can breach or pick a regular (non-smart) door lock.
By taking the proper precautions, like using a strong and unique password and taking advantage of two-factor authentication when available, this can help to greatly reduce the risk of a breach.
Some smart locks work with a key and some don’t. Smart locks typically allow you to remotely control your lock via Bluetooth, WiFi, or Z-wave. So, you can operate the lock without a key, and perhaps even when you’re away from your home. Smart locks may also include a key fob, key pad, or fingerprinting system in lieu of (or in addition to) a standard key.
Some of the corresponding apps also allow you to issue temporary access (eKeys) to guests, neighbors, or work people who need to enter your home temporarily. This way, you don’t need to give them a tangible key and worry about them making a copy of your house key.
Some smart locks, like the August Smart Lock, have geofencing. If you set up the geofencing feature, it can detect when you’re nearby (or when your phone is nearby) and unlock the door when you approach. It can also detect when your phone has left a specific vicinity, and then automatically lock the door. You set this feature up in the smart lock’s app.
A smart lock can help you to prevent or grant access to your home, and it acts as a barrier to entry. However, few smart locks (few good ones at least) have cameras, and a smart lock doesn’t provide the same features as a video doorbell, which acts as a sort of digital doorman.
A smart video doorbell can show you who’s at the door, so you know whether or not you want to answer for that person. A good video doorbell can also act as additional security, catching suspicious activity on video and helping to deter porch pirates.
You can get a smart lock up and running with just the device and your phone. However, some locks require an additional network module or an added subscription fee if you want to have all of the features the lock has to offer. If you want to use your compatible smart lock with Alexa or Google Assistant, you typically just need any Amazon Echo or Google Home speaker. You shouldn’t require a smart home Hub with most locks.
This depends on the features you want. Do you want a system where the products all work in tandem? Nest does a good job of making its smart products work together. For instance, when you unlock your Nest X Yale Lock, this can automatically disarm your Nest Secure security system as well. Do you want to focus on affordability? Your best bet might be to go with the older models or to mix platforms. You can still set up routines and control your devices via the Alexa app. Do you want Alexa-compatible products? Ring is a solid option. Want Google Home compatibility? Nest is a good choice. Again, it all depends on your individual preferences.
How we test smart locks
For the past several years, we’ve put dozens of smart locks through the gauntlet (ok, not literally) in our test homes. We test for things like ease of installation (can we do it ourselves or is a professional required?) and quality of the product overall. While having smarts is required for a smart lock, the thing we consider first and foremost is whether the device features strong hardware that will protect us. We’ll admit it, though, we’re also on the lookout for good-looking hardware. After all, who wants an ugly, clunky lock on their front door?
Next we test for functionality. Does the device work as promised? Is it easy to use? Are there any issues with connectivity? Is there a back-up for when the batteries die or the Wi-Fi goes down? After all, getting locked out of your house is a huge drag.
One final thing we look for is the smart home piece, which often comes in the form of an app. Does the app work as promised? Is it user friendly? Is it laid out nicely? Does it work with voice assistant? Can it work seamlessly with smart home hubs?
After all of that, we take a hammer and try to hack off the lock. Ok, not really, but we definitely let the locks weather the elements over time to make sure that they’re tamper-proof, waterproof, or whatever proof they claim to be.