WiFi-enabled thermostat reviews and comparisons

Why upgrade to a smart thermostat?


No need to get up (or even be home) – now you can adjust the temperature from your smartphone or by speaking to a smart assistant, including Alexa and Google Home.


Smart thermostats make it easy to set a heating and cooling schedule that adapts to the current weather, the changing seasons, and your own schedule to save you money.


No need to spin a dial whenever you get home, and your house can pre-heat while you’re commuting at the end of the day. Many smart thermostats tie into home automation systems such as HomeKit, SmartThings, and Wink.


Compare to last month’s usage, control who has access, get emailed alerts, and more.

Our pick: the ecobee4 is the best thermostat of 2018 (so far)

Our long-time favorite got even better in 2017. Amazon’s smart assistant, Alexa, now comes baked right into the hardware.

More reasons to love the ecobee4: room sensors for a complete view of your home’s comfort, monthly usage reports, ease of scheduling, support for a huge variety of 24v HVAC systems, and fine-tuned customization of your heating and cooling systems.

Read our hands-on review of the ecobee4

Latest News and Reviews

Our independent team buys and tries the latest smart thermostats.

Review: Nest Learning Thermostat (3rd gen.) keeps pace with the competition

Our Nest Learning Themorsta (3rd gen.) rating: Nest Learning Thermostat (3rd gen.) at a Glance What it is: the award-winning, category-defining Nest Learning Thermostat hardly needs an introduction these days. Installation[…]

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Review: Emerson Sensi Touch Wi-Fi Thermostat (ST75) is easy to install, easy to use, and easy to like

Our Emerson Sensi Touch WiFi thermostat rating: Emerson Sensi Touch at a Glance What it is: the Emerson Sensi Touch is a smart thermostat with a touch screen, easy-to-use app, and a[…]

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6 things you should do before you replace your current thermostat with a smart thermostat

If you’re ready to replace your old thermostat with a shiny new smart thermostat, read our 6 tips first to ensure a smooth upgrade process! We learned some of these[…]

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Best smart thermostats of 2018 – summer shopping guide

Summer’s here! Can your thermostat keep up? If you’re still turning your AC on and off with a dial or a few buttons on a thermostat you never programmed, then[…]

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Nest Temperature Sensor review: smart accessory enhances control over home’s temp

Nest owners, rejoice! With the new Nest Temperature Sensor, your Nest can take (and use) a temperature reading from somewhere else in your home! This new sensor is a small,[…]

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Comparison: ecobee3 lite vs. Nest Thermostat E – budget versions sacrifice accessory support but keep almost everything else

Last year, two of the best-known brands launched budget-friendly versions of their flagship smart thermostat models. The ecobee3 lite and the Nest Thermostat E pack most of what we love[…]

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The Google vs Amazon battle over your smart home intensifies

Google and Amazon continue to fire shots at each other in hopes of winning control over your smart home, from controversial product de-listings to funding rounds. Here’s a roundup of[…]

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Review: ecobee3 lite packs all that ecobee goodness into a wallet-friendly package

Our ecobee3 lite smart thermostat rating: The ecobee3 lite at a glance If you always wanted an ecobee but the price was just a little bit out of reach or you[…]

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What is multistage heating and cooling and how do I tell if I have it?

Part of figuring out if your system is compatible with a smart thermostat is determining if your 24v HVAC system is single stage or multistage. (Wait a minute, how do[…]

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Is my home compatible with a smart thermostat?

Line voltage, low voltage – what’s the difference?

Here’s our visual guide to wires, voltage, and more to help you identify your home’s heating and cooling setup. What kind of HVAC system do you have?

C-wire questions, answered

Many smart thermostats designed for a 24v HVAC system require a common wire (or c wire) to provide continuous power to the thermostat. (That’s because WiFi is too power-hungry to run off a battery or intermittent current).

C-wire explained

Best Budget Smart Thermostats 2018 

Ecobee3 Lite brings everything we love about ecobee thermostats at a budget-friendly price: it’s easy to use, compatible with a wide variety of HVAC setups, and can be expanded with room temperature sensors (sold seprately).

Read our ecobee3 lite review

Nest Thermostat E might be budget-priced, but it’s still got the the learning algorithm that made Nest famous and a beautiful display.

Read our Nest Thermostat E review

Emerson Sensi is easy to use and schedule and works without a C-wire. See why this no-nonsense thermostat is a reader favorite. 

Read our Emerson Sensi review