All biometric data stays on the device
At the threshold where convenience meets security, Eufy has introduced three new smart locks that reflect the smart home industry's ongoing negotiation between openness and proprietary control. Each device in the FamiLock lineup speaks to a different philosophy of access — one through the face, one through the hidden geometry of veins, one through the quiet persistence of a fingerprint — yet all three converge on Matter, the protocol that promises a unified smart home future. The announcement arrives at a moment when that future is still partly aspirational, with camera integration across platforms lagging behind the standard's ambitions.
- Eufy is staking its smart home position on Matter compatibility across all three locks, but the promise of true cross-platform freedom is undercut by camera features that remain siloed in the company's own app for most users.
- The flagship E40 collapses doorbell, security camera, and facial recognition into a single entry-point device — an ambitious consolidation that raises the stakes for what a front door can do.
- The E35's palm vein recognition represents a genuine leap in consumer biometrics, scanning beneath the skin in 0.6 seconds, but its novelty also means it's an unproven standard in a market still warming to fingerprints.
- The E32 quietly makes the strongest infrastructure argument — Thread-native networking means it can speak directly to the smart home without a bridge, a practical advantage that may matter more over time than any single biometric feature.
- The broader tension is clear: Matter is advancing faster than the platforms built to support it, and until SmartThings is no longer the lone exception on camera integration, Eufy's most powerful device remains partially tethered to its own ecosystem.
Eufy has unveiled three smart locks under its FamiLock line, each built around Matter compatibility but designed for distinctly different users. The E40, E35, and E32 all work with Apple Home, Amazon Alexa, Google Home, and Samsung SmartThings — yet they diverge considerably in how they grant access and what they offer beyond the lock itself.
The E40 is the most ambitious of the three, combining a smart lock, 2K video doorbell, and security camera in a single entry-point device. Facial recognition is the primary unlock method, with all biometric data stored locally on the hardware. A 135-degree camera, 60GHz radar for motion filtering, and a 15,000mAh battery round out a feature set designed to replace multiple devices at once. The complication: while Matter 1.5 technically supports cameras and doorbells, only SmartThings has activated that capability. For everyone else, the camera feed and doorbell alerts require Eufy's proprietary app — even as the lock itself integrates freely with their platform of choice.
The E35 takes a more intimate biometric approach, using palm vein recognition to read the unique patterns beneath the skin and unlock in roughly 0.6 seconds. All data stays on the device, and a 10,000mAh battery promises up to eight months of use. Built-in Wi-Fi removes the need for a separate hub, keeping the setup clean and self-contained.
The E32 is the most infrastructure-minded of the three. It supports Matter over Thread — the low-power mesh networking standard — allowing it to communicate natively with Thread Border Routers and integrate directly with major platforms without a bridge. Fingerprint, keypad, app control, and a physical key slot cover every access scenario, while eight AA batteries and a traditional key cylinder ensure it keeps working even in worst-case conditions. Both the E35 and E32 are designed as retrofit deadbolts for standard North American doors.
Together, the three locks reflect Eufy's bet that smart home users want genuine choice — and that Matter is the connective tissue to make that choice meaningful. How quickly the broader ecosystem catches up on camera support, and whether palm vein recognition earns mainstream trust, will determine how well that bet pays off.
Eufy has released three new smart locks under its FamiLock banner, each built around Matter compatibility and aimed at different corners of the smart home market. The trio—the E40, E35, and E32—all connect to Apple Home, Amazon Alexa, Google Home, Samsung SmartThings, and other Matter-enabled platforms, but they diverge sharply in how they let you in the door.
The E40 is the statement piece. It fuses a smart lock, video doorbell, and security camera into a single device mounted at your entry point. Facial recognition is the primary unlock method, with all face data kept locally on the hardware itself. The system is built to work even when you're wearing glasses or a hat—a practical detail that matters more than it sounds. The camera shoots in 2K with a 135-degree field of view designed to catch both visitors and package deliveries in full frame. A 60GHz radar sensor handles motion detection, filtering out false alarms from pets or blowing leaves. The lock runs on a 15,000mAh rechargeable battery backed by an 800mAh emergency reserve. It can pair with Eufy's HomeBase 3 hub to unlock additional AI features. The catch: while Matter 1.5 now supports cameras and video doorbells, most smart home platforms haven't activated that feature yet. Only SmartThings has fully enabled it. Everyone else will need to use Eufy's proprietary app to see the camera feed and doorbell alerts, even if the lock itself integrates with their ecosystem.
The E35 takes a different biometric path. It uses palm vein recognition—scanning the vein patterns beneath your skin—to unlock in roughly 0.6 seconds. All biometric data stays on the device. The lock carries a 10,000mAh rechargeable battery that Eufy claims can run for up to eight months on a charge, plus a 750mAh backup that kicks in automatically. Built-in Wi-Fi means you don't need a separate hub for remote access. Like the E40, it supports Matter across all major platforms and can link with other Eufy devices through the company's app.
The E32 is the traditionalist's choice. It offers fingerprint recognition, a keypad, a physical key slot, and remote control through the app. Its signature feature is support for Matter over Thread—the low-power networking standard that lets it communicate directly with Thread Border Routers and integrate natively with Apple Home, Google Home, and Alexa without needing a bridge. It also has built-in Wi-Fi as a fallback. Eight AA batteries power it, with a traditional key cylinder as the ultimate backup if the batteries die completely. Both the E35 and E32 are designed as retrofit deadbolts for standard North American doors, making installation straightforward.
What ties them together is Matter. Eufy is betting that smart home users want choice—whether that's the all-in-one convenience of the E40, the cutting-edge biometrics of the E35, or the Thread-native simplicity of the E32. The real test will be how quickly the broader smart home ecosystem catches up on camera support, and whether palm vein recognition becomes the standard it's positioned to be.
Notable Quotes
The system is designed to recognize users under a variety of conditions, including when wearing glasses or hats.— Eufy, on E40 facial recognition capabilities
SmartThings is the only major ecosystem to have enabled Matter camera support, so users will still need to rely on the eufy app for access to the camera and doorbell features when using most other smart home platforms.— Technical limitation of Matter 1.5 camera support across platforms
The Hearth Conversation Another angle on the story
Why release three locks at once instead of focusing on one flagship?
Because the smart home market isn't monolithic. Some people want everything in one device. Others care deeply about biometrics. Still others just want a lock that plays nicely with their existing setup. Eufy is covering the bases.
The E40 sounds impressive, but you mentioned the camera integration is limited. How much of a problem is that?
It's a real friction point. You get a 2K camera with smart detection, but if you're using Apple Home or Google Home, you're still opening the Eufy app to see who's at your door. That defeats some of the purpose of Matter integration.
What about the palm vein recognition on the E35? Is that actually more secure than fingerprint?
It's different, not necessarily more secure. Vein patterns are unique and harder to spoof than fingerprints, and they're stored locally so Eufy never sees them. But it's also less familiar to most people, which means adoption might be slower.
The E32 uses Thread. Why does that matter?
Thread is low-power and mesh-based, so your lock can talk directly to your smart home hub without Wi-Fi. It's more reliable and responsive. But you need a Thread Border Router, which not everyone has yet.
So which one should someone actually buy?
Depends on what you value. Want everything in one device and don't mind the app? E40. Want biometric innovation and eight months between charges? E35. Want Thread-native integration and simplicity? E32. There's no wrong answer—just different priorities.