You have probably seen the ads. A homeowner walks up to their front door, their phone in their pocket, and the lock clicks open automatically. No keys, no fumbling, no hassle. It looks easy. What the ads do not show you is the version where the Bluetooth does not connect, the battery died two days ago, and you are locked out of your own house at 10 PM.

Smart locks have come a long way. The good ones are genuinely useful — they solve real problems and integrate beautifully into a broader smart home. But the market is also flooded with cheap options that overpromise and underdeliver. Knowing the difference before you drill holes in your door saves you money and frustration.

At GreenieCo, we install and integrate smart locks as part of complete security and surveillance systems. We have tried most of what is out there, and we have strong opinions about what works in real homes with real families. We’ve seen this a lot in the field. If a lock needs a workaround every week, it’s not helping your family, it’s just giving you one more app to babysit.

Quick answer: The best smart locks combine a physical keypad with smart home integration, a reliable wireless protocol like Z-Wave or Zigbee, and a solid mechanical deadbolt underneath. Avoid anything that relies solely on Bluetooth or Wi-Fi without a hub. Look for locks that integrate with your existing security system so your door is part of your home’s overall protection, not a standalone gadget.

Why Smart Locks Matter Beyond Convenience

The obvious benefit of a smart lock is not needing a physical key. That alone is worth it for a lot of families. No more hiding a spare under the mat. No more getting copies made for the dog walker, the housekeeper, and the in-laws. No more panicking when your kid loses their key at school.

But the real value of a smart lock goes deeper when it is part of a connected home.

Access control. You can create unique codes for different people and set them to work only during specific times. Your housekeeper gets a code that works Tuesday mornings. Your contractor gets a code that expires when the project ends. Your teenager gets a code that logs when they come home. You know who entered your home and when, without asking anyone.

Automated routines. When your smart lock talks to the rest of your home, your arrival can trigger a sequence. The door unlocks, the hallway lights come on, the thermostat adjusts to your preferred temperature, and the alarm system disarms. When you leave, everything reverses — lock engages, lights off, alarm armed. You do not have to touch a single switch.

Remote control. Forgot to lock the door? Check from your phone and lock it from anywhere. A delivery person needs to drop a package inside? Unlock the door, watch them on your camera, and lock it again when they leave. That kind of control used to require a doorman. Now it is in your pocket.

Security integration. This is the big one. A standalone smart lock is a convenience device. A smart lock that is integrated with your cameras, sensors, and alarm system is a security device. When someone enters an unfamiliar code three times, your system can send an alert and start recording. When a door is forced open, the alarm triggers immediately. The lock is not working alone — it is part of a coordinated security response.

Types of Smart Locks: What Is Out There

Not all smart locks are created equal. Here is a breakdown of the main categories and what to expect from each.

Smart Deadbolts

These replace your existing deadbolt entirely. You remove the old hardware and install a new lock assembly that includes a motor, electronics, and usually a keypad or touchscreen on the outside. The better models still include a traditional keyhole as a backup.

Smart deadbolts are the most common type for residential use. They are available in a wide range of styles, from sleek modern touchscreens to more traditional-looking hardware that blends with older homes. If you are going to choose one type, this is the category to focus on.

Best for: Primary entry doors, front and back doors, garage entry doors.

Smart Keypad Locks

These are similar to smart deadbolts but emphasize the keypad interface. You punch in a code instead of using a key. Some models skip the smart features entirely and just offer keypad entry, while others combine keypads with full smart home connectivity.

The advantage of a keypad is simplicity. You do not need your phone. You do not need an app. You just punch in a number. For families with kids, elderly parents, or frequent guests, a keypad is often the most practical option. Everyone can remember a code, and you can change it in seconds if needed.

Best for: Homes with frequent visitors, families with kids, rental properties, side entries.

Smart Lock Retrofits

These are devices that attach to the inside of your existing deadbolt. You keep your current lock hardware on the outside of the door and add a motorized unit on the inside that turns the existing lock mechanism. The appeal is that you do not change the outside appearance of your door at all.

Retrofit locks can be a good option for renters or homeowners who do not want to replace their existing hardware. The downside is that they add bulk to the inside of the door, and since they are working with your existing lock mechanism, they are only as good as the deadbolt underneath. If your current deadbolt is cheap or worn out, a retrofit smart unit will not fix that.

Best for: Renters, historic homes where exterior appearance matters, temporary setups.

Smart Lever Handles

These replace your door’s lever handle with a smart version. They are more common on interior doors or secondary entrances. Most do not offer the same security grade as a deadbolt, so they should not be your primary exterior lock.

Best for: Interior doors, office doors, secondary entrances where a deadbolt is not practical.

Wireless Protocols: The Stuff That Actually Matters

This is where most homeowners get lost, but it is the single most important factor in choosing a smart lock that works well. The wireless protocol determines how your lock communicates with the rest of your home, and the differences are significant.

Z-Wave and Zigbee

These are purpose-built smart home protocols. They use very little power (great for battery life), communicate through a smart home hub, and create a mesh network where devices help relay signals to each other. A Z-Wave smart lock can have a battery life of a year or more.

The key advantage is reliability. Z-Wave and Zigbee are not competing with your family’s phones, laptops, and streaming devices for bandwidth. They operate on their own frequency, separate from your Wi-Fi network. This means your lock responds quickly and consistently, even when your house is full of people streaming and gaming.

The tradeoff is that you need a compatible smart home hub to use them. But if you are building a smart home, you likely have one already or should.

Our recommendation: For homes with a smart home hub or plans for one, Z-Wave or Zigbee locks are the best choice. They are reliable, efficient, and integrate smoothly into automated routines.

Wi-Fi

Wi-Fi locks connect directly to your home’s wireless network. No hub needed. The appeal is simplicity — you connect the lock to your Wi-Fi, download the app, and you are up and running.

The downsides are real, though. Wi-Fi is power-hungry, so battery life suffers. Some Wi-Fi locks need battery changes every two to three months. Wi-Fi is also susceptible to congestion. If your network is overloaded, your lock might be slow to respond or temporarily unreachable.

Wi-Fi locks work fine for simple setups where you just want keypad entry and remote locking from your phone. They are not ideal for integration into a broader automation system.

Bluetooth

Bluetooth locks work by detecting your phone when you are nearby. Walk up to the door, and it unlocks. Simple concept, inconsistent execution.

Bluetooth range is limited and varies depending on your phone, the lock, and what is between them. Some Bluetooth locks require you to open the app and tap a button, which is barely faster than using a key. Others use proximity detection, but the range can be unpredictable — sometimes it unlocks when you are still in the driveway, other times it does not unlock until you are standing there for ten seconds.

Bluetooth also means your lock is only as “smart” as the distance your phone can reach it. No remote access, no integration with other devices, no automated routines — unless the lock also has Wi-Fi or connects to a hub.

Our recommendation: Avoid locks that rely solely on Bluetooth. If a lock has Bluetooth as an additional feature alongside Z-Wave or Wi-Fi, that is fine. But Bluetooth-only locks are a step backwards in terms of functionality.

Thread and Matter

Thread is a newer protocol gaining traction in the smart home world, and Matter is a cross-platform standard designed to make different brands work together. Some newer smart locks are starting to support these protocols.

Thread offers low power consumption, fast response times, and does not require a dedicated hub if you have a Thread border router (many newer smart home devices include this). Matter ensures the lock will work with Apple Home, Google Home, and Amazon Alexa without requiring separate integrations.

It is still early days for these protocols in the lock market, but they are worth watching. If you are buying new, a lock that supports Matter gives you the most flexibility going forward.

What to Avoid: Lessons From the Field

We have installed a lot of smart locks and we have seen what goes wrong. Here are the most common pitfalls.

Locks with no physical backup. Any smart lock worth installing should have a physical key override or at least a keypad that works without a network connection. Electronics fail. Batteries die. Your phone’s Bluetooth can glitch. You need a way in that does not depend on technology working perfectly every time.

Bottom-shelf hardware. A smart lock is still a lock. If the mechanical components are cheap, it does not matter how fancy the electronics are. The deadbolt should be at least ANSI Grade 2, and Grade 1 is better. Cheap locks have loose tolerances, flimsy strike plates, and mechanisms that wear out quickly. A $50 smart lock from an unknown brand is not a deal. It is a problem waiting to happen.

Locks that require constant cloud connection. If your lock cannot function without talking to a server on the internet, that is a vulnerability. Internet outages happen. Cloud services go down. A good smart lock processes commands locally and uses the cloud for remote features — not as a requirement for basic operation.

Overly complex installations. Some smart locks require specific door preparations, non-standard bore sizes, or modifications to your door frame. Before you buy, check that the lock fits your door. Most standard US doors use a 2-1/8 inch bore and a standard backset. If the lock you are looking at requires custom prep, factor that into your decision.

Ignoring the strike plate. This one is not about the smart lock itself, but it matters. A smart lock on a door with a flimsy strike plate held in by half-inch screws is security theater. Upgrade to a reinforced strike plate with 3-inch screws that reach the door frame’s stud. The smartest lock in the world does not help if someone can kick the door in.

Integrating Smart Locks With Your Security System

A smart lock on its own is a convenience feature. A smart lock integrated with your home security system is something else entirely.

When your lock is part of your security and surveillance setup, it becomes one piece of a coordinated system. Here is what that looks like in practice:

Door opens, camera records. When any entry door is unlocked and opened, the nearest camera starts recording and saves a clip. You get a notification with the clip attached, showing who came in and when.

Unknown code triggers an alert. If someone enters wrong codes multiple times, the system flags it. Your phone gets a push notification, and the camera feed goes live so you can see who is at the door in real time.

Lock status in your security dashboard. You can see at a glance whether every door is locked, from a single app or a wall-mounted touchscreen. No walking around the house checking doors before bed.

Automated arming. When the last person leaves and all doors are locked, the security system arms automatically. When someone comes home and unlocks the door with their personal code, the system disarms. No keypad by the door to punch. No alarm blaring because you forgot.

Guest access with accountability. When a service provider uses their temporary code, the system logs it, the camera records it, and you have a complete record of access. When their job is done and the code expires, it is done.

This kind of integration is what turns a collection of devices into an actual security system. The lock is not an island. It is connected to cameras, sensors, lighting, and your alarm, all working together.

Our Recommendations for Mid-Missouri Homeowners

We work in homes across Columbia, Jefferson City, Lake of the Ozarks, and surrounding areas. Based on what we see and install, here is our general guidance:

For your primary entry doors, choose a Z-Wave or Zigbee smart deadbolt with a physical keypad and key override. Pair it with a reinforced strike plate. Integrate it with your home automation hub so it participates in arrival and departure routines.

For secondary entries and garage doors, a smart keypad lock works well. These doors often get used by family members, guests, and service providers, so easy code management is the priority.

For rental properties or guest houses, consider a Wi-Fi-enabled keypad lock that you can manage remotely without needing a hub at that location. The ability to create and delete access codes from your phone is ideal for short-term guests.

For new construction, plan your smart lock choices during the design phase. Pre-wire for the locks you want, make sure your smart home hub supports them, and coordinate with your security camera and alarm plan so everything integrates from day one.

Regardless of what you choose, make sure it is part of a system, not an afterthought. A smart lock that does not talk to anything else in your home is just a keypad on your door.

Frequently Asked Questions

What happens if the battery dies on my smart lock?

Every quality smart lock gives you at least a few weeks of low-battery warnings before it dies. Most models will beep or flash when the battery is getting low, and the app will send notifications. If the battery does die completely, you can use the physical key backup that most locks include, or some models let you touch a 9-volt battery to external contacts on the lock for emergency power to enter your code. This is why we insist on locks with physical backup options.

Are smart locks safe from hacking?

Like any connected device, smart locks can theoretically be targeted. But the real-world risk is low if you choose a reputable brand with encrypted communication, keep firmware updated, and use a lock that processes commands locally rather than relying entirely on cloud servers. The far more likely security risk is a weak door frame or a lock with poor mechanical quality — physical vulnerabilities are exploited far more often than digital ones.

Can I install a smart lock myself?

If you are comfortable with basic home improvement tasks, installing a single smart lock is manageable. The mechanical installation is similar to replacing a regular deadbolt. The complexity comes in the configuration — setting up codes, connecting to your hub, creating automations, and integrating with your security system. For a single lock on a single door, DIY is fine. For a whole-home system with multiple locks integrated into cameras and alarms, professional setup saves time and ensures everything works together.

Do smart locks work with voice assistants like Alexa or Google Home?

Most quality smart locks integrate with major voice assistant platforms. You can ask Alexa to lock the front door or check the status of your locks. However, for security reasons, most systems require a PIN or confirmation before unlocking via voice. You do not want someone shouting through your mail slot to unlock your door. The voice integration is best used for locking and checking status, not unlocking.

How long do smart lock batteries last?

It depends on the protocol and usage. Z-Wave and Zigbee locks typically last 8 to 12 months on a set of batteries. Wi-Fi locks drain faster — usually 2 to 4 months. Bluetooth locks fall somewhere in between. High traffic — lots of locking and unlocking throughout the day — will reduce battery life. We recommend rechargeable battery packs for high-traffic doors and standard alkaline batteries for less-used entries.

Your Front Door Is the First Line

A smart lock is one of the most practical upgrades you can make to your home. It simplifies your daily routine, gives you control over who enters your home and when, and — when it is part of a larger system — genuinely improves your home’s security.

The key is choosing the right lock for your situation and making sure it is connected to the rest of your home. A lock that works alone is a gadget. A lock that works with your cameras, your alarm, and your automation system is a real upgrade.

If you are thinking about upgrading your locks or building out your home security, let’s talk. We will walk through what makes sense for your home, your family, and your budget — no pressure, just honest recommendations.

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