August vs Yale: Which Smart Lock Actually Earns Your Deadbolt?

Here's the dirty little secret of the smart lock world: August and Yale are siblings. ASSA ABLOY — the Swedish lock conglomerate that quietly owns half the door hardware on Earth — acquired August in 2017. Yale has been in the ASSA ABLOY family even longer. So when you're comparing these two brands, you're really comparing two different design philosophies from the same parent company.

That doesn't make the comparison meaningless. If anything, it makes it more interesting. August builds retrofit smart locks that sit on top of your existing deadbolt. Yale builds full-replacement smart locks with integrated keypads and touchscreens. Same corporate DNA, completely different approach to your front door.

The Contenders

August WiFi Smart Lock (4th Generation)

August's flagship is a compact, cylindrical retrofit lock. You keep your existing deadbolt and exterior hardware — August replaces only the interior thumbturn. It's the smallest smart lock on the market by a wide margin, and it includes built-in WiFi so you don't need a separate hub or bridge for remote access. It runs on two CR123A batteries and installs in about 10 minutes with a screwdriver.

The key appeal: nobody can tell from the outside that you have a smart lock. Your landlord doesn't need to know. Your HOA doesn't need to know. You keep your existing keys as a backup. It's stealth tech for your door.

Yale Assure Lock 2

Yale's approach is the opposite. The Assure Lock 2 is a full deadbolt replacement — you're ripping out your old hardware and installing Yale's unit on both sides of the door. In exchange, you get an integrated touchscreen keypad, the option for a key override or a fully keyless configuration, and a broader module system that lets you choose between WiFi, Bluetooth, or Z-Wave/Zigbee connectivity.

Where August hides, Yale announces. The Assure Lock 2 makes a statement on your door with its slim rectangular profile and illuminated keypad.

Head-to-Head Comparison

Security: Who Wins the Lock Part?

This is where the comparison gets uncomfortable for August. The August WiFi Smart Lock doesn't really have its own security rating — it inherits whatever deadbolt you already have. If your existing deadbolt is a Grade 3 builder-grade Defiant from Home Depot, August doesn't upgrade it. It just makes it app-controllable. Your physical security is only as good as the hardware August sits on top of.

Yale's Assure Lock 2 ships as a complete ANSI/BHMA Grade 2 residential deadbolt. That's a known, tested quantity. The anti-pick pins and reinforced bolt are part of the package. You're not rolling the dice on whatever was on your door before.

From a digital security standpoint, both use AES 128-bit encryption for Bluetooth communication and standard TLS for cloud connections. Both apps support two-factor authentication. Neither has suffered a major publicized breach, though both have had minor firmware bugs over the years — standard fare for IoT devices.

Installation & Renter-Friendliness

August wins this category outright. Ten minutes, a screwdriver, and you're done. Because you're only replacing the interior thumbturn, you don't need permission from a landlord in most cases — you can swap it back when you move out and nobody will ever know. This is the #1 reason renters choose August.

Yale requires a full deadbolt swap. That means removing your existing deadbolt, drilling might be required if the existing bore doesn't match, and you'll have new hardware visible from the exterior. For homeowners, this is fine. For renters, it's a conversation with your landlord at minimum.

The App Experience

Both run through the Yale Access app (August's app was merged into Yale Access after the acquisition). So the software experience is essentially identical — same interface, same remote features, same guest access management, same activity log. If you've used one, you've used both.

This is actually a point in favor of the ecosystem as a whole. The app is solid. Guest access codes are easy to manage, the activity timeline is clear, and remote lock/unlock works reliably once WiFi is configured. It's not perfect — the auto-unlock geofencing can be temperamental — but it's among the better smart lock apps on the market.

Battery Life & Maintenance

August's reliance on CR123A batteries is its Achilles heel. These are more expensive than AAs, harder to find at a convenience store, and they drain faster because the lock's built-in WiFi radio pulls more power from a smaller cell. Real-world users report 3–6 months depending on usage and WiFi signal strength. Heavy auto-unlock users skew toward the lower end.

Yale's four AA batteries are cheap, universally available, and last significantly longer — most users report 6–12 months. If the WiFi module is drawing extra power, it's distributed across a larger battery bank. Practical advantage: Yale.

Who Should Buy Which?

Buy the August WiFi Smart Lock if:

You're a renter and can't replace your deadbolt. You want a discreet smart lock that doesn't change your door's exterior appearance. You already have a quality deadbolt and just want to add smart features. You value the fastest, simplest installation possible.

Buy the Yale Assure Lock 2 if:

You're a homeowner who wants a fully integrated solution. You want a keypad for PIN codes — great for Airbnb hosts, dog walkers, housekeepers. You prefer longer battery life and cheaper replacement batteries. You want a known ANSI-rated deadbolt rather than relying on whatever's already on your door.

Check August on Amazon Check Yale Assure 2 on Amazon