Yale vs August Smart Lock: Which Should You Buy?

Yale vs August smart lock is a matchup that trips up a lot of shoppers, since both brands are now owned by the same parent company but still sell locks that solve the “smart lock” problem in almost opposite ways.

Yale built the Assure Lock 2 as a full deadbolt replacement with a modular design, letting you start with Wi-Fi and swap in Z-Wave or Matter later without buying a new lock. August went the other direction, keeping its signature retrofit design that clips onto your existing deadbolt and leaves your exterior keyhole untouched.

We compared the Yale Assure Lock 2 with Wi-Fi and the August Wi-Fi Smart Lock (4th Gen), the current flagship Wi-Fi model from each brand, on installation, security certification, and smart home support to help you figure out which one actually fits your door.

Yale acquired August back in 2017, and the two brands now sit side by side under the same corporate roof, but they’ve kept distinct product philosophies rather than merging into one lineup. That’s good news for shoppers, since it means you’re choosing based on real differences in approach, not just a badge.

Both companies have been refining these designs for close to a decade, and it shows in the small details, from how quickly each app connects on setup to how consistently auto-unlock triggers at the door. Neither lock is a beta product, so this comparison comes down to which set of tradeoffs fits your door and your living situation better.

How We Picked

We reviewed official spec sheets and certification details from Yale and August, cross-checked installation and security claims against independent smart lock reviews, and looked at patterns in verified owner feedback for both locks. We focused on each brand’s current flagship Wi-Fi model, since that’s the fairest apples-to-apples comparison.

Yale vs August Smart Lock, At a Glance

Both locks sit in the mid-range for Wi-Fi smart deadbolts, with August typically landing as the more affordable of the two once you factor in that Yale’s Smart Keypad module and finish options can add to the total cost.

1. Yale Assure Lock 2, Best for Full Replacement & Modular Upgrades

The Yale Assure Lock 2 is built for buyers who want a complete, purpose-built smart deadbolt rather than an add-on retrofit. It carries an ANSI/BHMA Grade 2 security certification along with an IPX5 weather rating, a level of formal testing that most retrofit-style smart locks don’t pursue.

Because it’s a full deadbolt replacement, Yale controls the entire mechanism, not just an add-on motor. The lock also uses a modular connectivity system, so you can start with the Wi-Fi module and later swap in a Z-Wave or Matter module as your smart home setup changes, without buying an entirely new lock.

Setup requires removing your current deadbolt entirely and installing Yale’s own hardware in its place, a bigger job than a retrofit lock but still doable in under an hour for most standard doors. The touchscreen keypad supports adjustable entry codes and pairs with Auto-Lock and DoorSense, which confirms the door is actually closed before locking.

Apple Home Key support means you can tap a paired iPhone or Apple Watch to unlock instead of pulling out the Yale Access app, and it also works natively with Alexa, Google Home, and SmartThings. Owners generally report battery life closer to a year under normal use, longer than August’s retrofit motor typically manages.

If your exterior deadbolt is old or doesn’t match Yale’s available finishes, budget extra time for the install and possibly a matching handle set, since the Assure Lock 2 replaces the full assembly rather than working around it.

2. August Wi-Fi Smart Lock (4th Gen), Best for Renters & Easy Installs

The August Wi-Fi Smart Lock takes the opposite approach: it retrofits over your existing deadbolt rather than replacing it, so the outside of your door, including your current keyhole and keys, stays exactly the same. That makes it the go-to pick for renters, since most leases allow a retrofit lock that can be removed at move-out without a trace.

Installation is famously simple. August’s design clips onto your existing interior thumb-turn, and most owners report finishing the swap in 10 to 15 minutes with just a screwdriver, no drilling or hardware replacement required.

August’s signature feature is auto-unlock, which uses your phone’s Bluetooth signal to detect when you’re approaching the door and unlocks it automatically before you reach the handle. Combined with auto-lock when you leave, it’s a genuinely convenient hands-free experience that Yale’s keypad-first design doesn’t try to replicate.

The lock has built-in Wi-Fi for remote access and works with Apple Home Key, Alexa, and Google Assistant. Unlike Yale, the base August lock doesn’t ship with a keypad at all, so you’ll need the optional Smart Keypad accessory if you want PIN code entry on the outside of the door.

Because the motor housing sits on the inside of your door, it does add some bulk compared to a bare thumb-turn, and a few owners note it can interfere with certain interior door trim or nearby handles on narrow doors. It’s worth measuring your interior clearance before buying if your entryway is tight.

Smart Home Integration and Battery Life

Both locks connect natively to Alexa, Google Home, and Apple Home Key, so voice control and tap-to-unlock work about the same way on either one. Yale adds SmartThings support and its swappable module system, while August leans on its integration with Ring for camera-triggered automations at the front door.

Battery life favors Yale here. Owners commonly report close to a year of use from Yale’s Assure Lock 2 on standard batteries, while August’s retrofit motor tends to run through batteries faster, often landing in the three to six month range depending on how often auto-unlock triggers. Both apps send a low-battery push notification well before you’re at risk of getting locked out, and both fall back to a physical key or backup access if the battery does die.

How to Choose Between Yale and August

Check your lease or homeowner status first. If you rent and can’t replace exterior hardware, August’s retrofit design is close to the only option between these two. Homeowners have the freedom to pick either.

Decide how much formal security certification matters to you. If you want a lock engineered and Grade-certified as a complete unit, Yale’s Assure Lock 2 is the stronger choice on paper.

Think about how you want to unlock the door. If hands-free entry matters most, August’s Bluetooth auto-unlock is built for exactly that. If you’d rather punch in a code on a built-in keypad without buying an accessory, Yale ships one standard.

Factor in battery habits. If you’d rather not think about batteries often, Yale’s roughly year-long battery life is the easier lock to live with day to day.

Our Verdict

There’s no universal winner in the Yale vs August smart lock debate, the right pick depends on what you’re allowed to install and what you value more. The Yale Assure Lock 2 is the stronger buy if you own your home and want a fully certified deadbolt replacement with a keypad included and room to upgrade its connectivity later.

The August Wi-Fi Smart Lock (4th Gen) is the better call if you rent, want to preserve your existing exterior hardware, or just want the fastest possible install with hands-free Bluetooth unlocking thrown in.

Check the latest price on Amazon before you decide, since bundle deals with keypads or extra finishes shift the value equation on both locks. If you’re building out more of your entry setup, pair either lock with a video doorbell for your front door or a few smart plugs for Alexa to round out the basics.