Start with the price, then read the contract length next to it
A smart lock is a hardware purchase first and a service purchase second, so the two numbers belong on the same line. Across the brands in our data, listed prices run €12.23 to €1,402.75, which is a wide enough spread that a sticker price on its own tells you very little.
The second number is how long you are tied in. Contracts across the brands we track run 0 to 36 months, so the same lock can be a one-off purchase for one brand and the start of a multi-year commitment for another. Read the contract term before you read the discount, because a headline saving over a long term can cost more overall than a full price on a short one.
Worked example: Aqara lists locks as part of a wider range, with product prices starting at £3.49 and a featured price of £36.98, and its contract length is 0 months. A contract length of 0 months is the figure to look for if you want a lock you own outright and can take with you when you move. The Home Security Superstore lists smart locks among its product types and shows a price of $13.95, and it is the sort of listing worth pitting against Aqara's entry figure directly.
Check what the lock needs to work before you check what it does
The most common disappointment with a smart lock is not a weak motor or a bad fingerprint reader. It is a lock that cannot talk to the rest of your house because something else is missing. Two questions settle it: does it need a hub, and does it need professional installation.
Aqara requires a hub, which adds a device to buy and a bridge to keep online, but Aqara's hub also opens the lock to the wider smart home through alexa, google and homekit and matter, thread and zigbee. That is worth paying for if you already run one ecosystem and want your front door to join it. GHome Smart needs no hub and no installation, so it suits a renter or a first lock. GHome Smart's device range is plug, lighting and thermostat, and it works with alexa and google. Both brands are DIY installations, so a lock you can fit yourself removes the largest hidden cost in the whole decision.
Treat video and lock features as two different purchases
Front door hardware and front door video are often sold by the same brands, but the second part of that sentence is where ongoing fees hide. Check whether you are buying a lock or a lock plus a camera subscription.
Aqara combines camera, smart lock and smoke alarm in one range, and its video side comes with 7-day free cloud clips plus local microSD recording. Recording is retained for 7 days, and monthly monitoring costs £0. GHome Smart works the other way round, offering First month cloud storage and SD card recording and no installation. If you only want a lock, pay for the lock and ignore the video numbers, because they are what turns a hardware purchase into a recurring bill.
Read the ongoing cost line, not just the monitoring headline
Monitoring is where brands differ most, and where the cheapest figure needs checking against what it actually covers. Monthly monitoring across the brands in our data runs €0 to €39.45.
Two brands here sit at different ends. Aqara charges £0 per month with a contract length of 0 months, and it does not offer professional monitoring. The Home Security Superstore sells across alarm, camera and smart lock and does not offer professional monitoring either, which tells you what kind of buyer the listing is aimed at: someone self-monitoring rather than paying a call centre.
Use the warranty, returns and support window as the reliability proxy
Reliability is hard to measure from a product page, so use the commitments a brand is willing to put in writing. Aqara backs its products with a warranty of 2 years and a money back window of 14 days, and offers support by phone, help centre and community. A money back window matters most for a smart lock, because the first week is when you discover whether the bolt alignment suits your door.
Two other checks are worth making. Aqara provides local control and local storage, so core functions keep working without a cloud connection, and it is Matter certified, which is the open standard that keeps your lock usable when you change platforms. Aqara's security support commitment runs 2 years.
Read the brand's own record before you buy
The last check is the simplest one: read what the brand says about itself, then read independent summaries of it. Aqara is run by Lumi United Technology Co., Ltd., was founded in 2016 and is headquartered in CN, with shipping listed for GB. The Home Security Superstore trades as Velocity Products, Inc.. Knowing the legal entity behind a listing tells you who is accountable if a lock fails outside the returns window.
Detailed write-ups of Aqara, GHome Smart and The Home Security Superstore cover how each brand behaves in practice, and our ranked list of smart locks puts current models side by side. Whichever lock you shortlist, the deciding question is simple: does it meet your door, your ecosystem and your tolerance for a monthly charge.