Best Smart Thermostats for 2026
A smart thermostat can schedule your heating and cooling, adjust when nobody is home, and let you change the temperature from your phone or voice assistant. Before choosing one, check three things: whether it needs a C wire, whether it supports your HVAC system, and which smart-home platform you want to use. This guide covers those checks and four verified picks.
Affiliate disclosure: As an Amazon Associate, Everyday Tech Guide earns from qualifying purchases. This page contains labeled affiliate links; we may earn a commission if you purchase through them, at no additional cost to you. Our picks are not paid placements.
Quick picks
- Best for Google Home and Matter: Google Nest Learning Thermostat (4th gen)
- Best for Apple HomeKit and room sensors: ecobee Smart Thermostat Premium
- Best basic Matter thermostat: Honeywell Home X2S Smart Thermostat
- Best for Alexa homes: Amazon Smart Thermostat
How we chose
Each pick is currently sold on Amazon in the US, and its wiring, HVAC compatibility and platform support come from the maker's product pages or official listings. We have not tested these thermostats ourselves. We picked them to cover the main platforms, different C-wire needs, and a range of features from basic scheduling to room sensors.
The C wire: check this first
The C (common) wire provides continuous 24V power to a thermostat. Many older thermostats did not need one, so some homes do not have a C wire connected at the wall. Thermostats handle this differently: some require a C wire, some include an adapter, and some are designed to work without one in most homes. Remove your current thermostat's cover, photograph the wiring and run it through the maker's compatibility checker. If a C wire is required and missing, an adapter kit or an HVAC professional can usually solve it.
HVAC compatibility
The thermostats here are designed for low-voltage (24V) systems, which include most forced-air furnaces, central air conditioners, heat pumps and many boilers. Line-voltage systems, such as 120-240V electric baseboard heaters, need a different kind of thermostat. Check how many heating and cooling stages you have, whether you have a heat pump with auxiliary or emergency heat, and whether you have accessories such as a humidifier.
Matter, HomeKit, Alexa and Google
Matter lets one thermostat work across Apple Home, Google Home, Alexa and SmartThings. The two Matter thermostats here are Wi-Fi devices, so they do not need a Thread border router, but you still need a Matter controller such as a compatible smart speaker, display or hub to add them to a platform. Some thermostats instead use direct integrations, such as ecobee's HomeKit and Alexa support. Matter control may not include every feature found in the maker's app. For more background, read Matter vs. Thread explained or try our smart home compatibility checker.
Utility rebates and energy programs
Many electric and gas utilities offer rebates, bill credits or rewards for ENERGY STAR certified smart thermostats, sometimes tied to demand-response programs that briefly adjust your thermostat during peak demand. Eligibility and amounts vary by provider and change often. Check your utility's website, the ENERGY STAR rebate finder, or the maker's rebate finder before you buy, and read the program terms before enrolling.
Comparison at a glance
| Thermostat | C wire | Matter | Platforms | Wi-Fi |
|---|---|---|---|---|
| Nest Learning Thermostat (4th gen) | Not required in most homes | Yes | Google Home; others via Matter | 2.4 and 5 GHz |
| ecobee Smart Thermostat Premium | Power Extender Kit included | Not listed | Apple HomeKit, Alexa, Google Assistant, SmartThings | See maker specs |
| Honeywell Home X2S | Required | Yes (certified) | Apple Home, Alexa, Google Assistant | 2.4 or 5 GHz |
| Amazon Smart Thermostat | Required (or adapter kit) | Not listed | Alexa and Ring apps | 2.4 GHz only |
Google Nest Learning Thermostat (4th gen): best for Google Home and Matter
Google's newest Learning Thermostat works with Google Home and Matter, so it can also be controlled from other Matter-enabled apps and voice assistants. Setup requires the Google Home app. The listing we link includes a Nest Temperature Sensor (2nd gen) for balancing hot or cold rooms.
- C wire: Google says it is designed to work with or without a C wire, and that fewer than 1% of homes may need a C wire or Nest Power Connector.
- HVAC: most 24V systems, including gas, electric, oil, forced air, heat pump and radiant; up to three heating and three cooling stages.
- Wi-Fi: 2.4 and 5 GHz.
- Consider: features beyond basic control are designed around the Google Home app.
View the Google Nest Learning Thermostat (4th gen) with sensor on Amazon (affiliate link) →
We have not independently tested this product. Availability, specifications and the maker's subscription terms can change; confirm the details on the product listing and the manufacturer's site.
ecobee Smart Thermostat Premium: best for Apple HomeKit and room sensors
ecobee's top thermostat includes a SmartSensor for other rooms, radar occupancy sensing, an air quality monitor and a built-in speaker with Alexa or Siri. ecobee says it works with Apple HomeKit, Amazon Alexa, Google Assistant and SmartThings; Siri requires an Apple home hub.
- C wire: powered by 24VAC through a C wire, with an included Power Extender Kit for most homes without one.
- HVAC: most 24VAC equipment, including conventional 2H/2C systems, heat pumps with two-stage auxiliary heat, boilers and dual-fuel setups, plus accessories such as humidifiers and dehumidifiers, per ecobee.
- Extras: optional ecobee Smart Security plan for home monitoring features.
- Consider: ecobee does not list Matter on this product page.
View the ecobee Smart Thermostat Premium on Amazon (affiliate link) →
We have not independently tested this product. Availability, specifications and the maker's subscription terms can change; confirm the details on the product listing and the manufacturer's site.
Honeywell Home X2S: best basic Matter thermostat
The X2S is a simpler ENERGY STAR certified thermostat with flexible scheduling, auto-away, filter reminders and humidity display. Honeywell Home lists it as Matter certified and compatible with Apple Home, Amazon Alexa and Google Assistant, with app control through Resideo's app.
- C wire: required (24 VAC). Honeywell Home's site mentions a C-wire adapter offer; check current availability.
- HVAC: up to 2 heat/2 cool conventional or 2 heat/1 cool heat pump with electric backup, hot water heat and forced air; not electric baseboard heat (120-240V).
- Wi-Fi: 2.4 or 5 GHz.
- Consider: no learning features or remote room sensors.
View the Honeywell Home X2S Smart Thermostat on Amazon (affiliate link) →
We have not independently tested this product. Availability, specifications and the maker's subscription terms can change; confirm the details on the product listing and the manufacturer's site.
Amazon Smart Thermostat: best for Alexa homes
Amazon's thermostat is set up and controlled in the Alexa app, with control from the Ring app as well. Alexa can adjust the temperature when it has a hunch nobody is home or everyone is asleep. Amazon says it is made with Honeywell Home thermostat technology and is ENERGY STAR certified.
- C wire: required, or a C-wire adapter kit sold separately.
- HVAC: most 24V systems such as conventional forced air, heat pump and radiant boiler; not 110-240V systems like electric baseboard heat.
- Wi-Fi: 2.4 GHz only.
- Consider: no built-in speaker or microphone, works with one Alexa account, and Amazon does not list Apple Home or Google Home support.
View the Amazon Smart Thermostat on Amazon (affiliate link) →
We have not independently tested this product. Availability, specifications and the maker's subscription terms can change; confirm the details on the product listing and the manufacturer's site.
Before you install
- Turn off power to your HVAC system at the breaker or switch.
- Photograph the existing wiring and label each wire with the included labels.
- Run the maker's compatibility checker with those photos.
- Make sure your Wi-Fi reaches the thermostat location, and on the right band.
- Call an HVAC professional for line-voltage systems, unusual wiring or anything you are unsure about.
Building out the rest of your smart home? See our guides to Kasa vs. Tapo and smart locks with Matter.
Planning a Matter thermostat or sensors? Our Thread border router and Matter hub guide explains which hubs you may already own.
Rounding out home safety? Our smart smoke and CO detector guide covers Nest Protect alternatives and interconnected alarms.
Frequently asked questions
Do I need a C wire for a smart thermostat?
It depends on the model. The Honeywell Home X2S and Amazon Smart Thermostat require a C wire or a power adapter. The ecobee Smart Thermostat Premium includes a Power Extender Kit for most homes without one, and Google says the Nest Learning Thermostat (4th gen) works without a C wire in most homes.
Will a smart thermostat work with my heating system?
Most smart thermostats work with low-voltage (24V) systems such as forced-air furnaces, central air, many heat pumps and boilers. They generally do not work with line-voltage (120-240V) systems such as electric baseboard heaters. Use the maker's compatibility checker with a photo of your current wiring before buying.
Which smart thermostats work with Matter?
Google lists Matter support for the Nest Learning Thermostat (4th gen), and Honeywell Home lists the X2S as Matter certified. The ecobee Smart Thermostat Premium works with Apple HomeKit, Alexa, Google Assistant and SmartThings through its own integrations; ecobee's product page does not list Matter.
Which thermostat is best for Apple Home?
The ecobee Smart Thermostat Premium works with Apple HomeKit, and Siri can be built in with an Apple home hub. The Nest Learning Thermostat (4th gen) and Honeywell Home X2S can join Apple Home through Matter.
Can I get a rebate on a smart thermostat?
Often, yes. Many utilities offer rebates, bill credits or demand-response rewards for ENERGY STAR certified smart thermostats. Programs and amounts vary by provider and change often, so check your utility's website or the ENERGY STAR rebate finder before buying.
Can I install a smart thermostat myself?
Many people do, using the maker's app-guided setup. Turn off power to the HVAC system at the breaker first, photograph and label the existing wires, and call an HVAC professional if you see thick line-voltage wires or are unsure about your system.