Best Smart Thermostat 2026: 10 WiFi Heating Controls Ranked

At GBP 55.90 with 4.5 stars, this is the highest-rated thermostat from an established brand on the page, and the cheapest way into a name people recognise. The starter kit is complete: the wireless temperature sensor, the wireless receiver that wires to your boiler, and the internet bridge are all included, so there is nothing else to buy to get app control, schedules and hot water control on a combi boiler.

The everyday features are the ones you actually use: a heating boost button, a smart schedule per room, and a reminder to turn the heating down when you leave or a window is open. It works with Alexa, Google Assistant and Siri for voice control. One thing to know before you buy: the fully automatic version of geofencing and open-window response is tado's Auto Assist add-on at GBP 3.99 a month, so without it you turn the heating down from the reminder yourself rather than having it happen for you.

The other note is future compatibility. This is the V3+ generation, and tado's newer X range is a separate, non-interchangeable system, so if you later add tado radiator valves make sure they match this generation.

This is the cheapest smart thermostat in the comparison that has a settled review count behind it — GBP 45.99 with 285 ratings at 4.2 stars. It connects straight to your home WiFi with no separate hub, so the price on the label is the price you pay, which is not true of the Hive Mini further down.

For the money it does more than you would expect. There is a seven-day schedule with up to eight periods a day, a dual-sensor system that reads both the room air and an external probe, open-window detection that pauses the heating when the temperature drops suddenly, and voice control through Apple HomeKit, Alexa and Google Home. It suits combi boilers and water-based underfloor heating.

The compromises are the ones you accept at this price: a smaller brand with no UK service line, a glass panel that shows fingerprints, and 4.2 stars rather than the 4.5 of the tado above. If you want a smart thermostat that simply works from your phone and costs as little as possible, this is the pick.

One thousand six hundred and eighty-five ratings is more customer feedback than the next four thermostats on this page combined, so if a big, settled review count is what reassures you, this is the one to look at first. At 4.1 stars the average is a little below the tado and Hive picks, but it is built on a far larger sample.

Its real strength is compatibility. Netatmo states it works with most boiler types whatever the fuel — gas, electric, oil, wood or heat pump — which is broader than most rivals here, and it installs in under an hour. The Auto-Adapt feature reads the outdoor temperature and your home's insulation to reach the set temperature without overshooting, you get an energy-savings report in the app, and the Starck-designed unit ships with four colour strips so it blends into a wall.

One caveat matches the pattern across every brand here: the Netatmo Connected range is not compatible with the newer Netatmo Original range, so if you add radiator valves later, buy the matching generation. At GBP 95.36 it sits in the middle of the price range.

If you want the most established heating brand and a proper wall unit rather than a small puck, the T6 is it. One thousand and forty-seven ratings at 4.3 stars is the second largest sample in the comparison, and Honeywell has made heating controls for decades, so the app and the hardware are both mature.

The large black touchscreen is easier to use on the wall than the button-only units here, and the T6 supports a wide 24-230V range of on/off and OpenTherm systems, including gas, combi boilers and heat pumps. Geofencing, seven-day or 5/2-day schedules with six periods a day, and AUTO/MAN/ECO/HOLIDAY modes are all there, with Alexa, Google and Apple HomeKit voice control.

The catch is price and installation. At GBP 179 it is the most expensive thermostat on this page by a clear margin, and being wired it is the one most likely to need an electrician if your current wiring does not match. For a combi boiler where you mainly want app control, the cheaper picks above do the same core job for a third of the money.

Hive is the smart-home brand most UK households already recognise, and this combi-boiler kit includes the new Nano 3 hub, so unlike the Hive Mini lower down there is nothing extra to buy. At 4.4 stars over 332 ratings it is one of the better-rated options here, and the ecosystem stretches to Hive lights, plugs and sensors if you want to expand later.

The features are the mainstream set done well: create up to six daily heating slots across seven days, adjust the temperature on the thermostat itself or in the app, automatic frost protection that fires below 7°C to protect your pipes, geolocation reminders, and voice control. The added OpenTherm support lets a compatible boiler modulate rather than simply switch on and off, which Hive says can cut gas use.

The two things to weigh are price and scope. At GBP 149 it costs far more than the tado and Refoss picks, and this version controls heating only on a combi boiler — if you have a conventional system with a hot water tank, you want the Hive for Conventional Boilers further down instead.

This is tado's newest generation, and the reason to choose it over the cheaper V3+ at the top is the smart-home plumbing. The X range is built for Matter, the cross-brand standard, and the included Wireless Receiver X doubles as a Thread border router, so it can sit at the centre of a mixed smart home without extra hardware. If you already run HomeKit, SmartThings or a Matter setup, that matters.

Day to day it does everything the V3+ does — per-room schedules, geofencing, open-window detection without extra window sensors, and voice control through Alexa, Google and Siri — with a cleaner display. At 4.3 stars over 255 ratings it is well rated, if on a smaller sample than the older model simply because it is newer.

Two caveats. It costs more than twice the V3+, and the same subscription note applies: the biggest automatic energy savings sit behind tado's AI Assist add-on at GBP 3.99 a month. And as tado states plainly, X products do not mix with V3+ or older tado kit, so do not buy this to extend an existing V3+ system.

For GBP 59.99 this is the least expensive thermostat here that supports Matter, and it connects straight to your WiFi with no hub, so it is a genuinely cheap route into a modern, cross-brand smart home. At 4.2 stars over 374 ratings it has the most feedback of the sub-GBP-60 options in this comparison.

It is designed for combi boilers and wet underfloor heating, and it is generous with control: up to eight programmable periods a day, real-time energy reports, open-window detection, a child lock, a dimmable screen and memory recovery after a power cut. It works with Matter, Apple HomeKit, Siri, Alexa and Google Assistant, so it fits most ecosystems.

The limits are worth naming. Meross states clearly it is for water-based systems only, not hot water cylinders, showers or electric underfloor heating, so check your setup first. And like the other value brands here, it is a newer name without a UK service line behind it — the trade you make for the price.

Most smart thermostats on this page control heating only, which is fine for a combi boiler but not for the many UK homes that still run a conventional or system boiler with a separate hot water cylinder. This Hive kit is the answer for those homes: it controls both heating and hot water, with independent schedules for each, and it includes the Nano 3 hub.

At 4.5 stars over 205 ratings it is the joint highest-rated thermostat in the comparison. You get up to six daily slots for heating and hot water, a boost of up to six hours, automatic frost protection, holiday mode, geolocation and voice control, all through the familiar Hive app. The touchscreen and mirrored finish look the part on a wall.

The reasons it is not higher are price and scope. At GBP 149 it costs the same as the combi Hive and far more than the value picks, and it only makes sense if you actually have a hot water tank — on a combi boiler you are paying for a hot water channel you cannot use, and a cheaper model will serve you better.

The Mini is the least expensive door into the Hive system, and the small mirrored unit looks smart on a wall. At 4.3 stars over 206 ratings it is well liked, and it brings OpenTherm modulation and automatic frost protection to a combi boiler.

The catch is the one thing the title puts in capitals: no Hive hub is included. Without a hub you get manual control on the thermostat itself and nothing else — the app, remote access, schedules, boost and holiday mode all need a Hive hub you either already own or must buy separately. That is why the real cost of this pick depends entirely on your situation.

If you already have Hive kit and a hub, this is a genuinely cheap way to add smart heating control and it earns its place. If you are starting from scratch, add the price of a hub and it stops being a bargain — at that point the combi Hive above, which includes the hub, or the cheaper hubless tado and Refoss picks make more sense.