The best smart lock for most people in 2026 is the Schlage Encode Plus in the US, or a retrofit like the Aqara Smart Lock U200 if you want one design that fits both American deadbolts and UK euro-cylinder doors. Both give you fast keyless entry, Apple Home Key tap-to-unlock, and a mechanical key backup that never needs a battery. Below we rank five locks that genuinely deliver, and flag the fit and reliability traps the spec sheets skip.
One thing most roundups gloss over: US and UK doors are built differently. American homes use single-cylinder deadbolts; British and European homes mostly use multipoint locks with euro cylinders. A full-replacement American deadbolt physically cannot fit a UK multipoint door, so we’ve called out door compatibility for every pick and included a retrofit option that leaves your existing cylinder in place.
Best smart lock 2026 at a glance
| Pick | Product | Best for | Price (US / UK) |
|---|---|---|---|
| Best overall (US) | Schlage Encode Plus | Built-in Wi-Fi + Home Key on a Grade 1 deadbolt | around $290 / £270 |
| Best retrofit | August Wi-Fi Smart Lock (4th gen) | Keeping your keys and exterior | around $150 / £150 |
| Best for both US & UK doors | Aqara Smart Lock U200 | One lock that fits deadbolts and euro cylinders | around $250 / £220 |
| Best budget all-in-one | SwitchBot Lock Ultra | Cheapest full keyless kit, renter-friendly | around $170 / £160 |
| Best keypad + ecosystem | Yale Assure Lock 2 (Touch/Keypad) | Named codes, audit logs, Matter module | around $260 / £229 |
How we picked
We don’t claim a lab. This ranking is built from published specifications, manufacturer documentation, security certifications (ANSI/BHMA grades, BS3621/TS007 for the UK), and aggregated owner feedback from US and UK retailers and smart-home forums. We weighted four things: how reliably the lock opens day to day, how many backup ways in it offers, how honestly it fits real US and UK doors, and whether it plays nicely with Matter so it won’t be orphaned by a platform change.
Every recommendation names who it’s for and the trade-off you’re accepting. If you specifically want fingerprint unlocking as your primary method, read our dedicated guide to the Best Fingerprint Smart Locks of 2026: Top Picks Ranked alongside this one — some picks overlap, but the reliability trade-offs differ.
Best overall (US): Schlage Encode Plus
Around $290 / £270 — ANSI/BHMA Grade 1, built-in Wi-Fi, Apple Home Key, Alexa & Google
The Encode Plus is the closest thing to a no-compromise US deadbolt. It’s the only lock here that pairs a genuine ANSI Grade 1 mechanism — the highest residential security rating — with built-in Wi-Fi (no bridge to buy) and Apple Home Key, so iPhone and Apple Watch owners tap to unlock like a transit card. That combination is why it stays our default pick even against cheaper rivals.
Because Wi-Fi is on board, remote lock/unlock, guest codes and notifications work out of the box without a separate hub. The backlit keypad handles up to 100 access codes with scheduling, which suits Airbnb hosts and busy families, and there’s a physical keyway as a last resort. In aggregated owner reports the motor is quick and the Home Key handoff is reliable once set up.
The honest catches: built-in Wi-Fi is convenient but heavier on batteries than Bluetooth or Thread locks, so expect to swap the AA cells more often. It’s a US-style deadbolt, so UK multipoint doors are out. And while it supports Home Key, full Matter support has been slower to arrive than on Thread-native locks — check current firmware if cross-ecosystem control matters to you.
Pros:
- True ANSI/BHMA Grade 1 security
- Built-in Wi-Fi, no bridge required
- Apple Home Key tap-to-unlock plus 100 keypad codes
- Physical key backup
Cons:
- Built-in Wi-Fi drains batteries faster
- US deadbolt only — no UK multipoint fit
- Bulkier interior unit than retrofits
Who it’s for: North American buyers who want the strongest security rating with keypad and phone unlock, and don’t mind swapping batteries more often.
Best retrofit: August Wi-Fi Smart Lock (4th gen)
Around $150 / £150 — retrofit over your existing deadbolt, Matter over Wi-Fi, HomeKit/Alexa/Google
If you want keyless entry but hate the idea of losing your keys or changing how your door looks from outside, the 4th-gen August is the pick. It mounts over your interior thumbturn and turns your existing deadbolt with a motor, so your exterior hardware, keyway and keys all stay exactly as they are. That makes it the friendliest option for renters and anyone who likes their current lock.
It’s noticeably slimmer than previous Augusts, includes built-in Wi-Fi (no separate Connect bridge needed), and supports Matter for cross-platform control. Auto-lock, auto-unlock via phone proximity, and DoorSense open/closed detection are all here, and the app’s activity log tells you who came and went. For US deadbolts it’s a 10-minute, no-drilling install.
Trade-offs: there’s no keypad in the box, so unlocking relies on your phone, an Apple Watch, or an add-on keypad — a dead phone with no keypad means falling back to your physical key. It inherits any stiffness in your existing deadbolt, so fix a sticky lock first. And while it fits many euro-cylinder doors in Europe via the thumbturn, verify your specific mechanism before buying.
Pros:
- Keeps your existing keys and exterior hardware
- No drilling — ideal for renters
- Built-in Wi-Fi and Matter support
- Auto-unlock and open/closed sensing
Cons:
- No keypad included
- Relies on phone unless you add a keypad
- Only as smooth as the deadbolt it’s driving
Who it’s for: renters and anyone who wants smart access without altering their door or giving up physical keys.
Best for both US and UK doors: Aqara Smart Lock U200
Around $250 / £220 — retrofit, Matter over Thread, Apple Home Key, fits euro cylinders
The U200 is the rare lock designed to work on both sides of the Atlantic. It’s a retrofit that fits US-style deadbolts and, crucially, European and UK euro-cylinder doors, replacing the interior portion while keeping your existing cylinder and keys. That flexibility, plus Matter-over-Thread and Apple Home Key, makes it the most future-proof pick for mixed or international households.
It ships with an external keypad that adds PIN codes and NFC card unlocking, so you’re not phone-dependent. Because it speaks Matter over Thread, it can work across Apple, Google, Amazon and Samsung at once through a Thread border router, with low power draw and local control. Owner feedback highlights the fast motor and the genuinely useful Home Key support at a price below Schlage’s.
The catches are real, though. To get remote access and full smart features you need a Thread border router (a HomePod mini, Apple TV 4K, or a compatible Echo/Nest hub) — without one it’s Bluetooth-only. Fitting to a euro cylinder requires the right length cylinder and careful measurement, so read Aqara’s compatibility guide before ordering. The interior unit is chunky.
Pros:
- Fits both US deadbolts and UK/EU euro cylinders
- Matter over Thread — works with every major ecosystem
- Apple Home Key plus keypad with PIN and NFC
- Keeps your existing cylinder and keys
Cons:
- Needs a Thread border router for remote access
- Euro-cylinder fit requires careful measuring
- Bulky interior assembly
Who it’s for: international or mixed households, and anyone who wants one lock design that adapts to whatever door they have now or next.
Best budget all-in-one: SwitchBot Lock Ultra
Around $170 / £160 (with keypad) — retrofit over thumbturn, fits UK euro & US deadbolt, Matter via hub
The SwitchBot Lock Ultra is the cheapest way to get a complete keyless kit — motorised lock plus outdoor keypad — and it fits doors most American locks can’t. It clamps over your existing interior thumbturn, including UK euro cylinders and Scandinavian ovals, so your insurance-approved multipoint mechanism and keys stay untouched. Installation is adhesive-and-clamp, no drilling, usually about 15 minutes.
The paired keypad adds PIN, NFC card and (on the Vision model) fingerprint or face unlock, and the Ultra’s motor is faster and quieter than earlier SwitchBot locks. Battery life from the rechargeable pack runs many months. For renters and listed buildings where drilling is off the table, this is the standout.
Where it gives ground: Matter and remote access require a SwitchBot hub, adding cost and another box on your network. The interior unit is unmistakably a gadget on the door, not discreet hardware. And because it turns your existing mechanism, a stiff or misaligned multipoint lock will stay stiff — sort the door first.
Pros:
- Cheapest complete keyless kit here
- Fits UK euro-cylinder and multipoint doors
- No drilling — renter and heritage-friendly
- Rechargeable battery, quick quiet motor
Cons:
- Hub required for Matter and remote control
- Chunky, obviously-a-gadget interior unit
- Inherits any stiffness in your existing lock
Who it’s for: UK and European homes, renters anywhere, and budget buyers who want keypad plus app control without replacing their cylinder.
Best keypad and ecosystem: Yale Assure Lock 2
Around $260 / £229 — full-replacement deadbolt, swappable Matter/Wi-Fi modules, named codes
Yale has made locks since 1840, and the Assure Lock 2 is the most polished keypad deadbolt you can buy. The touchscreen or push-button keypad is quick and consistent in owner feedback, and the slim body looks like hardware, not a toy. Its standout is code management: every user gets a named, trackable credential with optional time limits, and the log tells you exactly whose code opened the door and when.
The modular design is the clever part. You buy the base lock, then add the connectivity you want — Wi-Fi, or a Matter module for cross-ecosystem control — so you don’t pay for radios you’ll never use. DoorSense confirms the door is actually shut before auto-lock fires, which makes hands-free locking genuinely trustworthy. HomeKit, Alexa and Google are all supported through the right module.
The trade-offs: the modular approach means checking you’re buying the correct SKU and any add-on module, which nudges the real-world price up. It runs on AA batteries at a premium price. And it’s a US-style deadbolt, so UK multipoint doors need Yale’s separate Linus L2 line instead.
Pros:
- Fast, consistent keypad with named, time-limited codes
- Full activity history — who opened the door and when
- Modular Wi-Fi or Matter, so you pay only for what you use
- DoorSense makes auto-lock reliable
Cons:
- Modules add cost and SKU confusion
- AA batteries at a premium price
- US deadbolt only — UK buyers need the Linus L2
Who it’s for: families and hosts who want per-person access logs and the flexibility to pick their connectivity, and will pay a bit more for polish.
How to choose a smart lock
Identify your door first. In the US and Canada, a separate deadbolt above the handle means the Schlage and Yale drop straight in, and the August, Aqara and SwitchBot retrofit over it. In the UK and Europe, if lifting the handle throws hooks along the door edge you have a multipoint lock with a euro cylinder — full American deadbolts won’t fit, so the SwitchBot Lock Ultra or Aqara U200 are your routes in. UK buyers with a BS3621 or TS007 insurance requirement should favour a retrofit that keeps the certified cylinder.
Decide how you want to unlock. Keypad codes are the most universal and shareable; Apple Home Key is the fastest for iPhone owners; phone proximity is convenient but useless with a dead battery. Pick a lock with at least two methods plus a mechanical or emergency backup — never rely on one.
Check the connectivity you actually need. Unlocking at the door works standalone on every pick. Remote access and automations usually need a hub or border router: Wi-Fi is simplest but hungriest on batteries, Thread is efficient but needs a border router, and hub-based systems add a box. Match this to gear you already own before spending on extras.
Prefer Matter for longevity. A Matter-capable lock works across Apple, Google, Amazon and Samsung and is less likely to be stranded if you switch platforms. Then pair it with the rest of your setup — for example our Best Home Security Cameras 2026: Indoor & Outdoor Picks guide and the Best Smart Light Bulbs 2026: Philips Hue & Alternatives roundup for automations that trigger lights when you unlock.
FAQ
Are smart locks safe from hacking?
For the vast majority of homes, yes. Reputable locks use encrypted communication and store credentials locally, and the realistic weak point is almost always the door frame or a cheap cylinder, not a remote hack. Choose a lock with a strong mechanical rating (ANSI/BHMA Grade 1 or 2 in the US, a retained BS3621/TS007 cylinder in the UK), keep firmware updated, and use unique codes.
Do smart locks work if the Wi-Fi or power goes out?
Yes. Smart locks run on their own batteries, independent of your home’s mains power, and the keypad, fingerprint or Home Key functions work locally at the door even with the internet down — only remote control and notifications pause. Every pick here also has a physical key or emergency backup, so you’re never locked out by an outage.
What is Apple Home Key and which locks support it?
Home Key lets you unlock by tapping your iPhone or Apple Watch to the lock, like a contactless card, with no app to open. In this guide the Schlage Encode Plus and Aqara U200 support it. It’s fast and works even when your phone battery is low, thanks to a power reserve, making it one of the most convenient unlock methods for Apple households.
Can I fit a smart lock to a UK front door?
Often, but not with a standard American deadbolt. Most UK doors use a multipoint lock and euro cylinder, which need a retrofit design. The SwitchBot Lock Ultra clamps over your thumbturn without touching the cylinder, and the Aqara U200 is built to fit euro cylinders. Both keep your existing keys and insurance-approved hardware — measure your cylinder before ordering.
Do smart locks need a subscription?
None of our picks require a subscription for core keyless entry, codes or notifications. Some brands offer optional paid tiers for extended activity history or extra features, but you can run any of these locks fully for free. That’s different from cameras — see our Best Home Security Cameras 2026: Indoor & Outdoor Picks guide for fee-free video options.
How long do smart lock batteries last?
Typically six to twelve months on AA cells for the Schlage and Yale, and several months per charge for rechargeable retrofits like the SwitchBot. Built-in Wi-Fi locks drain faster than Thread or Bluetooth models. A misaligned strike plate that forces the motor to fight the frame is the number-one battery killer, so check alignment during installation.
Verdict: which smart lock should you buy?
For most US buyers, the Schlage Encode Plus is the best smart lock of 2026 — Grade 1 security, built-in Wi-Fi and Home Key with no bridge. Choose the August Wi-Fi Smart Lock if you want to keep your keys and exterior untouched, the Aqara U200 if you need one design that fits both US and UK doors, the SwitchBot Lock Ultra for the cheapest complete kit or a UK multipoint door, and the Yale Assure Lock 2 if per-person codes and audit logs matter most. If fingerprint is your priority unlock method, cross-check the Best Fingerprint Smart Locks of 2026: Top Picks Ranked guide before deciding.
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