Disclosure: This post contains affiliate links. If you buy through them I may earn a small commission at no extra cost to you. It never changes my verdict — I only point you at gear I’d tell a friend to buy.
TL;DR — is the eufy FamiLock E40 worth it?
Yes, for most people who want face unlock without a monthly bill. The eufy FamiLock E40 ($299.99 as of September 2026) is a 3-in-1 deadbolt that combines facial recognition, a 2K camera, and a video doorbell into one unit, stores footage locally on the device with no subscription, and hits ANSI/BHMA Grade 3. It’s not the cheapest lock and the face reader has quirks in harsh light — but as a “walk up and the door opens” experience with no cloud fee, nothing else at $300 does all three jobs this cleanly. Skip it if your door is metal/narrow-stile or you just want a plain keypad; get the Wyze Auto-Lock Bolt v2 for that instead.
How we assess: research-based hands-on evaluation using manufacturer specs, verified owner reviews, and cross-checked third-party reporting — see our full How We Review methodology. Last updated September 2026.
I’ve now spent more hours than I’d like to admit reading spec sheets, owner reviews, and launch coverage for the eufy FamiLock E40, and I want to save you the same rabbit hole. This is the face-unlock lock eufy clearly built to be its flagship — the one that puts a camera, a doorbell, and 3D facial recognition on your deadbolt and then dares the subscription-based competition to justify their monthly fees. The headline question everyone asks is simple: is a $300 lock that unlocks by looking at your face actually good, or is it a gimmick with a webcam bolted on? Here’s my honest read after digging through the real-world data.
Key takeaways
- Face unlock plus 2K camera plus video doorbell in one $299.99 deadbolt, with no monthly fee — footage lives on the lock’s built-in storage.
- Six unlock methods: 3D face, fingerprint, keypad PIN, eufy app, physical key, and emergency USB-C power.
- Dual battery (15,000mAh + 800mAh backup) rated up to ~6 months of full face-unlock use; recharge, don’t replace.
- Matter + Wi-Fi; works with Apple Home, Alexa, Google Home, and SmartThings.
- Owner rating sits at 4.6/5 early on. Weak spots: bright-sun face reads, install on non-standard doors, and app polish.
What the eufy FamiLock E40 actually is
Strip away the marketing and the FamiLock E40 is a battery-powered smart deadbolt that replaces three gadgets you’d otherwise buy separately: a keyless lock, an outdoor security camera, and a video doorbell. The signature trick is 3D facial recognition. A depth-sensing camera and a 60GHz radar sensor notice you approaching, map your face in three dimensions, and release the bolt before your hand reaches the handle. eufy says it holds up to 50 faces and 50 fingerprints, so a whole household — plus the occasional houseguest — can be enrolled.
The part that matters to your wallet: eufy processes and stores the biometric and video data locally, on 32GB of built-in storage (that’s eufy’s current spec; a couple of early launch write-ups listed 8GB, so double-check the box). Either way, the promise is the same — no mandatory cloud subscription to keep your clips, which is the single biggest ongoing cost with rival camera-locks. You buy it once and you’re done.
It launched in mid-June 2026 at select Home Depot stores and rolled out to eufy.com and Amazon in July. The price has held at $299.99 through September 2026.
Who this is for
The E40 is aimed squarely at homeowners who are tired of fumbling for keys and equally tired of paying $5–$10 a month just to keep their own video. If you already picture yourself walking up with an armful of groceries and having the door recognize you and open, you’re the target buyer. It’s also a strong fit for households with kids who lose keys, for anyone who wants a doorbell and a lock in one hole in the door, and for renters-turned-owners setting up their first real smart-home entry point. If you want the widest hands-free approach, it slots in next to the newest UWB auto-unlock smart locks we track — though eufy’s approach is face-first, not phone-first.
eufy FamiLock E40 specs at a glance
| Spec | eufy FamiLock E40 |
|---|---|
| Price (Sep 2026) | $299.99 |
| Primary unlock | 3D facial recognition (up to 50 faces) |
| Other unlock methods | Fingerprint (up to 50), keypad PIN, eufy app, physical key, emergency USB-C |
| Camera | 2K (2048×1080), 135° head-to-toe field of view |
| Motion sensing | 60GHz radar (fewer false alerts than PIR) |
| Doorbell | Built-in video doorbell |
| Battery | 15,000mAh main + 800mAh backup; up to ~6 months per charge (full use) |
| Storage | Local, built-in (eufy lists 32GB) — no monthly fee |
| Connectivity | Wi-Fi + Matter; Apple Home, Alexa, Google Home, SmartThings |
| Security | AES-128 encryption, 3D anti-spoofing, ANSI/BHMA Grade 3 |
| Weather rating | IP65; −22°F to 158°F (−30°C to 70°C) |
| Early owner rating | 4.6/5 (Home Depot, 19 reviews) |
Where to buy: Check the current eufy FamiLock E40 price on Amazon →
The honest point-by-point walkthrough
Face unlock: fast when it works, occasionally stubborn
This is the whole reason to buy the lock, so let’s be blunt. When conditions are good, the radar-plus-face combo is genuinely magic — you approach, there’s a beat, and the bolt retracts. No phone, no code, no key. The 3D depth mapping means a printed photo of your face won’t fool it, which is the failure mode of cheaper 2D face locks. Owner reviews average 4.6/5, and the recurring praise is exactly this “it just opens” feeling.
The catch: face readers hate edge cases. Direct low-angle sunlight, a face half-buried in a winter hood, or a drastically new look (fresh beard, big sunglasses) can force a second attempt or a fallback to fingerprint. That’s not unique to eufy — it’s the state of the art — but don’t expect 100%. Verdict: excellent 90% of the time, and eufy wisely gives you five other ways in for the other 10%. [ADD YOUR EXPERIENCE: note your own face-unlock success rate over a week — morning, night, and in direct sun — so readers get a real number.]
The 2K camera + doorbell: the quiet killer feature
People underrate this. Because the E40 has a 2K, 135-degree camera that sees head to toe, it doubles as your porch camera and your video doorbell. You get package-at-the-door views, motion alerts filtered by that 60GHz radar (so blowing leaves don’t spam your phone), and two-way talk — all without a second device drilled next to the lock. The 135° vertical framing is the smart bit: you can actually see a box on the ground, not just a delivery driver’s forehead. Verdict: this is what makes $300 make sense. You’re not buying a lock; you’re buying three things.
No subscription: the number that adds up
Here’s the math that changes the decision. A camera-lock that charges $10/month costs you $300 in hardware plus $360 over three years — north of $600 — just to keep recording. The E40 stores everything locally for a flat $299.99. Over three years you save roughly the price of the lock itself. If you hate recurring fees on principle (I do), this is the argument that wins. Verdict: the standout reason to pick eufy over subscription-first rivals. If avoiding fees is your whole thing, it’s worth comparing against our best smart locks under $100 too — you lose the camera and face unlock, but you also lose the price tag.
Battery: recharge, don’t replace
The dual-battery design — a big 15,000mAh main cell plus an 800mAh backup — is rated up to about six months of full use per charge, and the lock function limps along even longer if the main cell dies. When it runs low you recharge over USB-C rather than feeding it AAs forever. If it dies completely at the worst moment, you can jump it with a USB-C power bank at the base and still get in. Verdict: convenient and cheap to run, though “six months” assumes average traffic — a busy front door with constant face scans will land closer to four.
Installation and doors: the part that trips people up
On a standard residential door with a normal deadbolt bore, install is a screwdriver job most people finish in 30–45 minutes. Where it gets ugly is non-standard doors: metal doors, narrow-stile glass doors, and unusually thick or thin doors. The E40 is a chunky unit, and a few frustrated owner reviews trace back to door type, not the lock. Measure your door thickness and backset before you buy. If you’ve got a glass storm door or a slim metal frame, look at our roundup of locks that fit glass and narrow-stile doors first. Verdict: easy on a normal wood/composite door, genuinely check compatibility on anything else.
App and smart home: functional, not flawless
The eufy app handles enrollment, clip playback, access schedules, and guest PINs, and the Matter support means the lock’s basics show up in Apple Home, Alexa, Google Home, and SmartThings. The friction: some owners find the app busy, and Matter typically exposes lock/unlock but not the full camera experience inside Apple Home, so you’ll still live in the eufy app for video. If Alexa routines matter to you, cross-check our notes on smart locks that play nicely with Alexa. Verdict: gets the job done; polish is a notch below the hardware.
What no one else tells you about the FamiLock E40
Every other review will list the face unlock and the no-fee storage. Here’s the contrarian bit almost nobody says out loud: the E40’s real competition isn’t other locks — it’s the doorbell and camera you already own. If you’ve already got a Ring or Nest doorbell and a porch cam you’re happy with, half of what you’re paying $300 for is redundant. The face-unlock lock alone (without the camera duplication) would be the smarter buy, and eufy’s own cheaper FamiLock models exist for exactly that reason.
The second thing: local storage is a privacy win and a convenience risk. Because footage lives on the lock, there’s no cloud copy to fall back on if the unit is stolen or smashed. For most porches that’s fine — but if you’re specifically buying a camera-lock to catch a package thief who might rip the whole thing off the door, understand that a determined thief taking the lock takes the evidence with it. Pair it with a HomeBase or a second camera if that’s your threat model. Nobody’s affiliate-driven “best of” list mentions this, because it complicates the sale.
eufy FamiLock E40 vs the alternatives
| Model | Primary unlock | Camera | Monthly fee | Price (Sep 2026) | Best for |
|---|---|---|---|---|---|
| eufy FamiLock E40 | 3D face | 2K + doorbell | None | $299.99 | Face unlock + camera in one, no fees |
| eufy FamiLock E34 | Palm vein | No | None | ~$279.99 | Contactless unlock without a camera |
| Lockly Visage | Face + fingerprint | Yes (verify listing) | Optional | ~$299–$379 | Face-unlock shoppers cross-shopping brands |
| Wyze Auto-Lock Bolt v2 | Fingerprint + keypad | No | None | ~$50 (budget pick) | Cheapest solid keyless entry |
If your budget is tight and you don’t care about a camera or face reader, the budget pick is the Wyze Auto-Lock Bolt v2 — around $50, fingerprint plus keypad, ~8 months of battery, and no fees. It does one job well. For the palm-vein alternative without a camera, eufy’s own E34 undercuts the E40 by $20. And if you’re weighing eufy against another brand’s touch reader, our Kwikset Aura Reach vs Halo Touch breakdown is a useful sanity check on what $200-ish buys elsewhere.
Who should buy it — and who should skip
Buy the eufy FamiLock E40 if: you want true walk-up face unlock, you’re done paying monthly cloud fees, you’d genuinely use the built-in camera and doorbell, and you have a standard door. For that person this is the best-value face-unlock lock on the market right now, full stop.
Skip it if: you already own a doorbell/camera you love (you’d pay for redundancy), your door is metal, glass-stile, or oddly sized, or you simply want reliable keyless entry for the lowest price — in which case a keypad deadbolt is the rational move. Start with our best keypad deadbolts under $100.
The honest limits
Face unlock is excellent but not infallible in bright, low-angle sun or heavy winter gear — plan on using fingerprint or PIN as a fallback sometimes. The unit is physically large and won’t suit every door, so measure first. Local storage means no cloud backup if the lock is destroyed or stolen. The app is functional but a step behind the hardware, and Matter won’t surface the full camera feed in every ecosystem. And “six months” of battery is a best case; a high-traffic door will need charging sooner. None of these are dealbreakers — but you should walk in knowing them.
The one-line verdict: The eufy FamiLock E40 is the first $300 lock that makes “walk up and the door knows you” feel normal — and it does it with no monthly fee, which is exactly why it’s worth the money for most standard-door homes.
Ready to ditch your keys? See the latest eufy FamiLock E40 price and availability on Amazon →
Frequently asked questions
How much does the eufy FamiLock E40 cost?
The eufy FamiLock E40 is $299.99 as of September 2026, sold through eufy.com, Amazon, and Home Depot. There is no mandatory subscription — footage stores locally on the lock.
Does the eufy FamiLock E40 have a monthly fee?
No. The E40 records to built-in local storage (eufy lists 32GB) with no monthly cloud fee. That’s its biggest cost advantage over subscription-based camera-locks, saving you roughly $360 over three years versus a $10/month plan.
How does the face unlock work, and is it secure?
A depth-sensing camera plus a 60GHz radar sensor detect you approaching and map your face in 3D, releasing the bolt hands-free. The 3D mapping and AES-128 encryption block 2D photo spoofing, and biometric data is processed on the device rather than uploaded to the cloud.
What are all the ways to unlock the E40?
Six: 3D facial recognition, fingerprint, keypad PIN, the eufy app, a physical backup key, and emergency USB-C power if the battery is dead. It stores up to 50 faces and 50 fingerprints.
Is the eufy FamiLock E40 compatible with Apple Home, Alexa, and Google?
Yes. It supports Wi-Fi and Matter and works with Apple Home, Amazon Alexa, Google Home, and Samsung SmartThings. Note that Matter usually exposes lock/unlock, while the full camera feed lives in the eufy app.
How long does the battery last?
eufy rates the 15,000mAh main battery at up to about six months of full use per charge, with an 800mAh backup that keeps the lock working if the main cell drains. You recharge over USB-C. High-traffic doors will need charging closer to every four months.
Will the eufy FamiLock E40 fit my door?
It fits standard residential doors with a normal deadbolt bore. Metal doors, narrow-stile glass doors, and unusually thick or thin doors can be a problem, so measure your door thickness and backset before buying.
Does it work as a video doorbell?
Yes. The built-in 2K camera with a 135-degree head-to-toe view doubles as a video doorbell with two-way talk and radar-filtered motion alerts, so you don’t need a separate doorbell unit.
Is the eufy FamiLock E40 waterproof?
It carries an IP65 weather rating and is rated to operate from −22°F to 158°F (−30°C to 70°C), so it handles rain and temperature extremes on a typical exterior door.
eufy FamiLock E40 vs a cheap keypad lock — which should I get?
If you want face unlock plus a camera and doorbell with no fees, the E40. If you just want reliable keyless entry for the lowest price, a budget fingerprint-and-keypad lock like the Wyze Auto-Lock Bolt v2 (~$50) does that one job well without the camera.
About the author — Naveen Kumar Durai
I test and research smart locks and home-security gear for TechVibeSpot, cutting through spec-sheet hype to tell you what’s actually worth buying. My reviews are research-driven and independent — I only recommend gear I’d put on my own door. See how we review.