A smart lock lets you unlock your front door with your phone, a code, a fingerprint or a tag instead of hunting for keys — and lock it again from anywhere, check whether you left it open, and give family or trades temporary access without cutting a key. The big decision in the UK is whether to fit a retrofit lock that sits over your existing one (a DIY job that keeps your keys working) or replace the whole lock (more integrated, but often a locksmith job), plus how much you care about a high security rating. These are the best smart locks to buy in 2026.
The Short Version
- Best overall — Yale Conexis L2. A polished full smart lock from the UK's best-known lock brand, no subscription.
- Best retrofit — SwitchBot Lock Ultra. Fits over your existing lock in minutes and keeps your keys.
- Best for security — Ultion Nuki. A high-security anti-snap cylinder with a smart motor.
- Best for Apple homes — Aqara. HomeKit and Matter support with fingerprint entry.
- Best value — SwitchBot Lock. The retrofit smart-lock experience for less.
Best Overall: Yale Conexis L2
For a proper, integrated smart lock, the Yale Conexis L2 is the pick — and Yale's name carries real weight in British homes. It replaces your existing multipoint handle with a smart one, unlocking via the app, a phone tag, a key card or a PIN module, and it needs no monthly subscription. You can grant and revoke access remotely (with the optional connect bridge), see a log of who came and went, and auto-lock behind you. It is a bigger install than a retrofit, but the result is the most seamless and secure-feeling of the mainstream options. Check the price on Amazon
Best Retrofit: SwitchBot Lock Ultra
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If you would rather not change your lock at all, the SwitchBot Lock Ultra is the easiest way in. It mounts over the inside of your existing euro-cylinder lock and turns the thumb-turn for you, so it installs in minutes with no locksmith and your physical keys keep working exactly as before. You get app control, auto-unlock as you approach, PIN keypads and fingerprint options, and wide smart-home support. Our SwitchBot Lock Ultra review explains how well the retrofit approach works in practice. Check the price on Amazon
Best for Security: Ultion Nuki
Security-conscious buyers should look at the Ultion Nuki, which pairs Ultion's highly rated, anti-snap British cylinder with Nuki's smart motor. You get the reassurance of one of the toughest cylinders on the market — the sort insurers like — plus full smart control: app unlocking, auto-lock, access sharing and door-state alerts. It is the priciest option here, but for anyone who wants smart convenience without compromising on physical security, it is the standout. Check the price on Amazon
Best for Apple Homes: Aqara
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If your home runs on Apple, Aqara's smart locks are the natural fit, with strong HomeKit and Matter support so they slot neatly into the Home app and Siri alongside your other devices. They typically add fingerprint, PIN and key options on top of app control, and work with Aqara's wider ecosystem of sensors and hubs. For an Apple-centric smart home that wants a lock to match, they are the smart choice. Check the price on Amazon
Best Value: SwitchBot Lock
You do not have to spend a fortune to go keyless. The standard SwitchBot Lock brings the same clever retrofit approach as the Ultra — sitting over your existing lock so your keys still work — at a lower price, with app unlocking and optional keypad and hub add-ons. It lacks some of the Ultra's polish and speed, but as an affordable, tenant-friendly way to add smart access without altering your door, it is excellent value. Check the price on Amazon
What to Look for in a Smart Lock
A few things decide the right lock. Retrofit versus replacement is the biggest: a retrofit sits over your existing lock, installs in minutes and keeps your keys (ideal for renters), while a full replacement is more integrated but usually a bigger job. Check door and lock compatibility — euro-cylinder, multipoint and mortice locks differ, so confirm yours is supported. Weigh security — look for recognised ratings and anti-snap cylinders — and unlock methods (app, PIN, fingerprint, tag, auto-unlock). Finally, note whether you need a hub or bridge for remote access, and remember these run on batteries you will need to change. A smart lock pairs naturally with the rest of a connected home — see our best video doorbells guide, best security cameras guide and best smart thermostats guide.
How These Picks Were Chosen
This is an editorial buying guide that curates the strongest smart locks for UK doors, weighing installation type, door compatibility, security, unlock methods, smart-home support and value. Recommendations draw on our hands-on review of the SwitchBot Lock Ultra and each lock's specification and standing. Prices change often, so check the current listing before buying.
This is an editorial buying guide; the individual product review it links to is based on our hands-on testing rather than a single laboratory benchmark.
