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Find Your eufy Smart Lock
S Series — Flagship Biometrics
Our top tier, for the door everyone uses. FamiLock S3 Max and S3 use infrared light to read your palm's vein pattern in 0.6 seconds — contactless, and gentler on small hands and worn fingertips than fingerprint. Both add a 150° 2K camera; S3 Max adds a doorbell and rear screen. S330 swaps palm vein for fingerprint entry.
E Series — The Balanced Choice
The middle tier, for households after one standout feature without flagship pricing. Think touchless palm vein entry with dual power, or face recognition paired with a 2K camera and doorbell. There's a BHMA-certified video lock here too, and a lean fingerprint model with long battery life, built-in Wi-Fi and no bridge to buy.
C Series — Simple and Durable
The entry tier, and the easiest first smart lock. Fingerprint or keypad entry, built-in Wi-Fi on most models so there's no bridge to add, and high-capacity batteries that last for months. Most fit a standard deadbolt and install in about 15 minutes, no drilling — handy for front doors, garages, side doors, offices and bedrooms.
Match the Lock to the Door
If kids and grandparents are always at your door, go biometric — palm vein copes with small hands and worn fingertips. Want to see who's knocking? A video lock adds a 2K camera and doorbell. Garage, side door, office or bedroom? Keypad plus fingerprint is plenty. On a tight budget, start with the C Series and add cameras later.
Six Questions Before You Buy
Which Unlock Method Suits Your Household?
Fingerprint is quick, though it can be fussy with small hands and worn fingertips. Palm vein models read the pattern under your skin in 0.6 seconds; E40 goes touch-free with face recognition. Keypad PINs suit kids and dog walkers, and most add one-time or expiring codes plus a log of every entry. Every lock has a physical key.
Will It Fit Your Door?
Most eufy smart locks replace a standard single-cylinder deadbolt — except handle-style C33 and Door Lever versions of C220/C30. All fit left- or right-hand doors; none fit mortise locks or round, non-standard faceplates, though eufy Support can supply a drive-in faceplate. Check cross bore diameter, door thickness and backset.
What If the Battery Dies?
A dead battery won't lock you out. The app warns you early, at 20% or 10% depending on model. If it runs flat, most have an emergency port on the front — plug in a power bank and you're in. Or use one of the 2 physical keys in every box. Palm vein and video flagships carry a second internal battery that takes over on its own.
Local Storage, Not a Bill
A cheap lock stops being cheap once the subscription starts. Plenty of competing video locks charge monthly just to show you footage your own camera recorded. eufy keeps your fingerprints, palm vein data and video in local storage, on the lock or HomeBase. No cloud fee, and no central database of your biometrics to breach.
Can It Be Kicked In?
Software means little if the hardware gives way. S330 and E330 are BHMA certified, and FamiLock S3 Max, S3 and E34 meet ANSI/BHMA Grade 1, the top US grade for lock strength. Every model then adds what steel can't: encrypted connections, auto-lock and an entry log. Expect IP53 to IP65 weather ratings and -22F to 158F operation.
Will It Work with My Home?
Matter-capable models link to Apple Home, Google Home, Alexa and SmartThings; other Wi-Fi models work with Alexa and Google Assistant. Voice unlock still needs verification — a voice PIN, Face ID or an unlocked Apple Watch — so nobody can shout it open. Add HomeBase 3 and your eufy cameras to watch every entry point in one app.
Is it worth getting a smart lock?
Smart door locks can be worth it for their convenience and advanced security features. They offer keyless entry, remote access, and integration with smart home systems, which can enhance both security and ease of use. While they often come with a higher upfront cost, the added functionality and peace of mind they provide can make them a valuable investment.
How does a smart lock work?
A smart lock uses electronic technology to control access to your door via Bluetooth or the Internet. You can unlock it remotely using a smartphone app, keypad, fingerprint sensor, or voice commands. The lock engages its mechanism electronically, and it employs encryption and secure protocols to protect against hacking.
How to install smart locks?
To install a smart entry door lock, follow these steps:
1. Gather the necessary tools like a screwdriver, measuring tape, and possibly a drill.
2. Unscrew and remove the old lock from your door.
3. Install the smart door lock assembly following the manufacturer's instructions.
4. Connect the video door locks to the door and frame.
5. Install batteries or power sources.
6. Configure the smart lock systems to your home's Wi-Fi network or hub, and set up any desired features or settings.
7. Test the smart lock.
Can you have a smart lock without Wi-Fi?
Smart locks can operate without Wi-Fi if they rely on Bluetooth or keypad entry for access. These options allow keyless convenience and secure control locally, without needing an internet connection. However, features like remote unlocking or live alerts typically require Wi-Fi. So, a smart lock without Wi-Fi still offers strong security, just with limited remote capabilities.
Does smart lock lock automatically?
Smart locks can automatically secure your door after a short delay. You can customize the auto lock timing anywhere between 30 seconds and 4 minutes. This feature reduces the chance of forgetting to lock up, giving added peace of mind without requiring any extra effort from you.
Do smart locks work if the power goes out?
Yes. Most smart locks have a mechanical key override, so they will still work in the event of a power outage. However, if the smart lock relies on batteries or Wi-Fi, you may lose some features if the battery is drained or Wi-Fi is disrupted but you can still open the door with the key.
Do smart locks still have a key?
Yes, many smart door locks still have a key option. While smart door locks offer keyless entry using methods such as PIN codes, biometrics, or smartphone apps, most models also retain a traditional key cylinder as a backup or alternative entry method. This dual-functionality allows users to choose between keyless or key-based access depending on their preference or specific circumstances.
Is a smart lock safer than a deadbolt?
Smart locks offer a different kind of protection compared to deadbolts. While they allow remote access and activity tracking, they can be targeted digitally. Deadbolts lack digital vulnerabilities but depend entirely on physical strength and correct usage. Both have their strengths, but choosing between them depends on the environment, your routine, and how you prioritize control versus mechanical simplicity.
Are smart locks easier to break into?
Smart locks are not inherently easier to bypass than traditional ones, but their security hinges on software. Poor encryption, outdated firmware, or weak passwords can leave them vulnerable. Well-designed smart locks with strong authentication protocols typically resist casual intrusions. So, security depends more on quality and maintenance than the concept of being “smart.”
Will smart door locks be hacked?
While smart door locks provide advanced security features beyond traditional locks, no system is completely impervious to hacking. To bolster the security of your smart door lock, select models like eufy smart locks that use bank-grade encryption. Additionally, use strong, unique passwords for your lock's settings and secure your home Wi-Fi network to further protect against unauthorized access.