Smart Locks vs. Deadbolts: Which Actually Makes Your Home Safer?

The honest answer is one most affiliate sites don’t write, because it costs them commission: the average smart lock is a marginal security improvement over a properly installed traditional deadbolt, and a meaningful convenience improvement. If you’re shopping a smart lock to make your home safer, you’re shopping for the wrong reason.

That doesn’t mean don’t buy one. It means buy one for the right reason — convenience, key management, audit trails — and don’t expect it to substitute for the security work that actually matters.

This is the comparison written without the affiliate-side pressure to recommend the most expensive thing.

What “Security” Actually Means for a Lock

A residential lock has to defeat four threats:

1. Bumping and picking — overt manipulation of the lock cylinder.
2. Forced entry — kicking the door, prying the frame, breaking the lock with a hammer or pipe wrench.
3. Bypass — defeating the lock by avoiding the cylinder entirely (breaking a door panel, reaching through a glass insert, using the emergency key on a smart lock).
4. Credential compromise — someone obtaining a key, code, or fingerprint that the lock accepts.

The first three are mechanical. The fourth is what’s new about smart locks.

The mistake most homeowners make is comparing locks on threat #1 (because that’s where lock-marketing focuses) when threats #2 and #4 are dominant in actual residential burglaries.

How a Traditional Deadbolt Performs

A properly installed Grade 1 or Grade 2 deadbolt (ANSI/BHMA grading) is good. The deadbolt cylinder is hard to pick — most modern Schlage and Kwikset cylinders include anti-pick pins and anti-bump features at the higher grades. The bolt is a 1-inch hardened steel cylinder. Defeating it without a key requires either picking (specialized skill, time, and risk of being seen), bumping (works on cheap locks, fails reliably on Grade 1), or destroying the lock (loud, slow).

What undermines a traditional deadbolt is almost never the lock itself. It’s:

• The strike plate and frame — the kick-in failure mode covered in the door-reinforcement guide.
• The door panel — a glass insert next to the deadbolt makes the lock irrelevant.
• The keys floating around — the spare under the mat, the housekeeper’s key, the contractor’s key from two summers ago.

Threats 2 and 3 are why door reinforcement matters more than lock choice. Threat 4 — uncontrolled key copies — is why smart locks have a real value proposition.

How a Smart Lock Performs

Most smart locks fall into one of two architectures:

1. Retrofit (August, Aqara): the existing deadbolt stays in place; a motorized adapter on the inside turns it. The cylinder you defeat from outside is unchanged.
2. Replacement (Schlage Encode, Yale Assure, Kwikset Halo): the entire deadbolt is replaced by a new unit with built-in keypad and Wi-Fi or Bluetooth.

On the four threats:

1. Bumping and picking: Replacement smart locks often retain a physical key cylinder for backup. The cylinder is typically a Grade 2 cylinder by default; some manufacturers offer Grade 1 upgrades. Retrofit locks inherit whatever cylinder was already on the door — better or worse than the smart unit. Result: roughly the same as a traditional deadbolt of the equivalent grade.
2. Forced entry: The bolt is the same 1-inch hardened steel. The strike plate is still your strike plate. Result: identical to a traditional deadbolt.
3. Bypass: Smart locks introduce two new bypass surfaces. First, the keypad — codes can be guessed, photographed, or shoulder-surfed. Second, the smart-home network — a vulnerable Wi-Fi network or compromised cloud account is a remote attack vector that didn’t exist on a traditional deadbolt. Result: the smart lock is meaningfully more attackable than the traditional deadbolt on this dimension.
4. Credential compromise: This is where smart locks win. Codes can be issued per-person and revoked instantly. Audit logs show who unlocked the door when. A housekeeper who quits doesn’t keep your house key — you delete their code. A contractor’s access expires automatically the day the work ends. Result: the smart lock is significantly better.

Net assessment: smart locks improve credential management substantially, leave forced-entry resistance unchanged, and add some new attack surface around the digital side. For homeowners with frequent legitimate access needs (renters, dog walkers, in-laws, contractors), the credential-management win is real and worth paying for. For homeowners who turn a single key and rarely share access, the upgrade is mostly cosmetic.

The Specific Models Worth Considering

August Wi-Fi Smart Lock (4th gen)

• Type: Retrofit (preserves your existing deadbolt cylinder)
• Price: ~$200
• Buy: Buy on Amazon

Best for: anyone who wants to keep their existing key cylinder and just add smart functionality. Renters love the August because it’s hard for landlords to object — the deadbolt itself isn’t changed. Limitation: no exterior keypad (you can buy a separate August Smart Keypad for ~$50 to add one).

Schlage Encode

• Type: Replacement deadbolt with built-in Wi-Fi keypad
• Price: ~$280
• Buy: Buy on Amazon

Best for: most people most of the time. Built-in Wi-Fi (no hub required), built-in keypad, BHMA Grade 2 mechanical certification, Alexa and Google integration. The Encode Plus adds Apple Home Key (tap your iPhone or Apple Watch to unlock). Schlage’s mechanical pedigree shows in the bolt and cylinder quality.

Yale Assure Lock 2

• Type: Replacement deadbolt, multiple connectivity options
• Price: $200–280
• Buy: Buy on Amazon

Best for: HomeKit households or buyers who want a key-free option (the Yale comes in both keyed and key-free variants). Multiple connectivity modules let you start with Bluetooth-only and add Wi-Fi or Z-Wave later. Solid build quality. Slightly more clutter on the app side than Schlage.

Traditional Schlage B60N (Grade 1 deadbolt)

• Type: Mechanical deadbolt, no smart functionality
• Price: ~$50
• Buy: Buy on Amazon

Best for: anyone who wants pure security and no batteries to change. A Grade 1 deadbolt with a high-security strike plate, 3-inch screws, and a reinforced frame is, on every dimension except credential management, equal to or better than every smart lock listed above. And it costs a fifth of the price.

The Combination That Works for Most Homeowners

Pick one primary smart lock for the front door — Schlage Encode is the safe default — and keep traditional Grade 1 deadbolts on the back door and garage interior door. The rationale:

• The front door is where convenience matters most (deliveries, family members, guests). Smart functionality earns its keep there.
• The back and side doors are entry points where credential management is rarely the issue. Forced-entry resistance is. A $50 Grade 1 deadbolt with a reinforced frame outperforms a $250 smart lock on that threat at a fraction of the price.
• Single-vendor smart-home stacks have one bad day per year — software updates, account password resets, Wi-Fi outages. You don’t want every entry point on the same vendor’s cloud.

What to Skip

A few categories of “smart lock” worth avoiding:

• No-name smart locks under $100. The cylinder grade is rarely disclosed, the firmware update story is questionable, and the cloud account is hosted somewhere with no documented security practices.
• Locks that require a proprietary hub. Some Z-Wave smart locks are great if you already run Z-Wave. They’re a poor first smart lock if you don’t.
• Fingerprint-only locks. Fingerprint sensors fail in cold weather, with wet fingers, and after a cut on the relevant fingertip. Always combine with a code or key backup.
• Smart locks marketed as “burglar-proof.” No lock is burglar-proof. The marketing language is a tell.

The Honest Recommendation Order

1. Reinforce the existing door (door reinforcement guide) — this dominates lock choice.
2. If credential management matters (renters, frequent guests, contractors): add a Schlage Encode or August on the front door.
3. If credential management doesn’t matter much: skip the smart lock and put the same money into an outdoor camera or window film.

The smart lock industry is mature and the products are good. Just don’t buy one expecting it to make your house dramatically safer than a properly installed deadbolt would. It won’t. What it will do is make your life easier in ways that, if you have those problems, are well worth the price.

---

This post is for educational purposes. It is not professional security advice. Consult a licensed locksmith or security professional for high-risk situations.

This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases at no extra cost to you.