Best smart thermostats of 2026, and when to buy one

Smart thermostat picks based on published reviews and lab tests, and whether to buy now or wait.

Updated October 18, 2026

buybynow verdict

Good time to buy with a rebate or at the lowest price of the past 90 days

Smart thermostats are commonly discounted on Black Friday, but many utilities also offer rebates year-round, which can beat a sale. Check your utility's rebate first. If heating season is starting and the price is at or near its lowest price of the past 90 days, buying now is reasonable.

Next big saleLate November; rebates year-round

Our picks

Best overall

Ecobee Smart Thermostat Premium

Top pick from Wirecutter and PCMag: Includes a room sensor, air-quality monitoring and built-in voice control.

Room sensor with occupancy detection included
Works with Alexa, Google and Apple Home
Bigger display than most

Check price at Ecobee

Best for Google Home

Google Nest Learning Thermostat (4th Gen)

Sleek design and AI scheduling that handles most setup for you, per Wirecutter. Supports Matter.

Matter support
Twist-and-push control
Sensor measures temperature, not occupancy

Check price at Google Store

Best budget

Amazon Smart Thermostat

Basic but reliable, per Wirecutter and PCMag, and among the cheapest smart thermostats.

Alexa-based controls
Simple scheduling
Fewer features and sensors

Check price at Amazon

Best value Ecobee

Ecobee Smart Thermostat Enhanced

A cheaper Ecobee that keeps broad smart-home support and sensor compatibility.

Supports Ecobee room sensors (sold separately)
Works with Apple Home
No built-in speaker

Check price at Ecobee

What to look for

C-wireMany smart thermostats need a C-wire (a constant-power wire from your furnace). If yours doesn't have one, pick a model that includes a power adapter, or have an HVAC pro add one.

EcosystemChoose the one that matches your home: Google, Alexa or Apple Home.

Room sensorsSensors help even out hot and cold rooms.

RebatesMany utilities offer rebates on qualifying models. Check before you buy.

What nobody tells you before you buy

Check compatibility firstUse the maker's online compatibility checker before buying. Heat pumps, multi-stage systems, and high-voltage baseboard heaters (which most smart thermostats don't support) need extra care.

Take a photo before you unscrew anythingTurn off power to the HVAC system at the breaker, then photograph the existing wiring and labels before removing the old thermostat.

The learning periodLearning thermostats take a week or two to settle on a schedule. Adjust settings early on so it learns what you actually want.

Sharing with your householdMost smart thermostat apps let you invite other people in your home. Set that up so everyone uses the app instead of fighting the schedule at the wall.

Ongoing costsUsually none for the thermostat. Some features, like security or extended history, may need a paid subscription. Room sensors use batteries.

When to buy: Price timing

Now – early NovemberHeating season starts. Buy with a utility rebate or at the lowest price of the past 90 days.

Black Friday / Cyber MondayTypically the biggest discounts.

SpringPrices often settle. Good for installs before summer.

Year-roundUtility rebates can stack with sales.

Timing reflects typical seasonal sale patterns, not a guarantee.

FAQ

Will a smart thermostat save money?

It can, by cutting heating and cooling when you're away. Savings vary by home and habits.

Ecobee or Nest?

Ecobee if you want room sensors and broad compatibility, Nest if you live in Google Home.

Can I install it myself?

Most people can, if their system is compatible. Check the maker's compatibility tool first.

How we picked

We did not test these products ourselves. Our picks are based on manufacturer specs and published lab tests and reviews, including: