Top Smart Thermostats to Watch in 2025

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There are plenty of options when it comes to great smart home devices, but few have the potential to impact your overall comfort more than a programmable thermostat.

If you want to remotely control the temperature in your home, save energy and money on utility bills with more efficient heating/cooling, or just want to engage in the longstanding thermostat war with your significant other from anywhere in the world, a programmable Wi-Fi thermostat is for you.

With so many options available, it’s hard to know where to start. That’s why our smart home experts have done extensive testing to find the best smart thermostats on the market right now.

We can confidently say that the Nest Learning Thermostat (available at Amazon) is the best of them all, with an easy setup, intuitive controls, and voice commands. Looking for something cheaper? The regular Nest Thermostat offers great value.

1. Best OverallNest Learning Thermostat#

• Smart home compatibility: Google Assistant, Amazon Alexa, Nest, Insteon, Nexia
• C-wire required: No
• Dimensions 3.3-inch diameter, 1.21-inch deep

Google's Nest Learning Thermostat is one of the biggest names in the home heating space, partially because it was one of the first well-designed connected thermostats on the market. Even a decade after its introduction, it's still the best smart thermostat for most people, thanks to its sleek, intuitive design and robust set of smart features.

If you've ever used an iPod, the Nest Thermostat will be familiar to you—in fact, it was designed by Tony Fadell, the designer of the original iPod hardware.

Once it’s hooked up to your Wi-Fi network, changing the temperature is as simple as rotating the thermostat's dial. You can use the app to set a traditional time-of-day schedule more easily than most non-smart thermostats. You can also simply let the Nest learn your daily habits and adjust to a comfortable temperature automatically.

This feature is great for those who don't want to put in any effort but might be a bit too confusing for people who like to fine-tune their schedules, so you can turn it off if you wish.

Like many other smart thermostats, the Nest can use its built-in sensors and your phone’s location to determine when you aren’t home, and automatically adjust your home temperature to save you money and energy. It's also compatible with the energy-saving plans and rebates offered by many utility companies. You can adjust it with your voice using Alexa or Google Assistant and even get reminders when it's time to change your HVAC filter.

Nest offers sensors you can put in different rooms to adjust the temperature based on where you are at any given time. Sensor functionality is limited compared to competitors like Ecobee and Honeywell. Still, overall, the Nest’s ease of use more than makes up for that slight shortcoming.

Our only other gripe with the Nest—besides its heftier price tag (which, again, rebates can help with)—is its setup. The actual process is quite easy, and the Nest app will walk you through it step-by-step if you've never installed a thermostat before. But in an effort to stay simple and compatible with a wide variety of heating and cooling systems, the Nest uses a workaround to draw power in homes without a common wire (or C-wire).

The thermostat will function normally in most cases, but can cause problems with certain HVAC systems. If your home doesn't have a C-wire, we recommend having an HVAC professional install one, or using a thermostat like the Ecobee Smart Thermostat, which uses a slightly more complex (but reliable) conversion kit to power itself.

Pros:

✔️ Works with Alexa and Google Assistant

✔️ Intuitive

✔️ Support temperature sensors

Cons:

❌ Does not support Apple HomeKit

Read more: Google Nest Learning Thermostat Review: The Ultimate Smart Thermostat for American Homes

2. Best Traditional-StyleSensi Touch 2#

• Smart home compatibility: Amazon Alexa, Google Assistant, Samsung SmartThings
• C-wire required: Yes
• Dimensions: 3.25 X 5.6 X 0.77 inches

Sensi isn't a household name in the smart thermostat space (even among tech nerds like us), but it occupies a good niche: The Sensi Touch 2 Smart Thermostat is similar to a traditional thermostat in terms of ease of use.

The Sensi Touch 2 is the most high-end Sensi model. Installation requires a C-wire, and the app walks users through a simple setup. The terminal blocks have push connectors, similar to those used by Nest and Ecobee, making connecting wires faster and easier.

The unit uses an intuitive touchscreen control. The styling isn’t as sleek and compact as some other smart thermostat options, but the larger screen may make the controls more accessible for some users. The menu system is easy to navigate when adjusting temperature settings.

On average, the unit sensor was a little over a degree off compared to our NIST-calibrated thermometer. This isn’t a big deal, as not many users would notice that level of discrepancy.

The Sensi Touch 2 can be integrated with extra room sensors, available for purchase separately. These sensors monitor temperature and humidity at an independent location away from the base unit. They can be wall-mounted using the screw and drywall plug provided or used freestanding with the included plastic stand.

Remote sensing gives a better sense of average conditions, especially in a larger home. You can connect up to 15 extra sensors to the base unit. With temperature averaging across the sensors, the system accuracy improved to within 1 degree of the measured temperature.

The thermostat also has a dehumidification mode. It doesn’t do this via a dehumidifier (unless there’s one integrated into your HVAC system), it uses an approach called overcooling. If you activate this mode via the app, the thermostat will run up to 3 degrees cooler than the set point. Cooler air holds less moisture, so cooling will make space feel less humid as the absolute humidity will drop slightly.

The Sensi Touch 2 Smart Thermostat is a replacement for the Sensi Touch Wi-Fi Thermostat, which we previously tested back in 2017. This older version is still available for purchase (for now). But, thanks to its better touchscreen interface and extra room sensor pairing (not an option for the older Touch) we think this is the one worth buying.

Pros:

✔️ Intuitive touchscreen

✔️ Excellent temperature control

✔️ Remote temperature sensing

Cons:

❌ Basic styling

Read more: Sensi Touch 2 Smart Thermostat Review: A Classic Design with Modern Intelligence

3. Best ValueGoogle Nest Thermostat#

• Smart home compatibility: Amazon Alexa, Google Assistant
• C-wire required: Not required for most users (Note: We couldn’t get it to work properly without a C-wire.)
• Dimensions: 3.3-inch diameter, 1.07-inch deep

The Nest Thermostat is a more basic version of our top pick, the Nest Learning Thermostat, scoring only slightly lower. Unlike the Nest Learning Thermostat, it does not work with the Nest app and cannot learn your temperature preferences over time.

However, the new Nest Thermostat offers comparable features to the Nest Learning Thermostat like Eco Mode, Home/Away Assist, and scheduling features to help you save on energy costs. All in all, it’s a good value for the money. We found these settings easy to adjust within the Google Home app and enjoyed reviewing the energy reports, which offer helpful insights into when your unit is running and for how long.

The first HVAC system we tried didn’t have a C-wire, and we experienced unpredictable behavior that Nest attributed to the lack of a C-wire.

With the second system, we had a few hiccups during the setup process. However, Nest customer service sent us a new thermostat right away. Once the replacement was connected, the thermostat performed well at heating and cooling. Everything you need to get started is in the box except the trim kit, which can be purchased separately.

Pros:

✔️ Compatible with Amazon Alexa and Google Assistant

✔️ Google Home app is easy to use

✔️ Works well

Cons:

❌ No native integration with Apple HomeKit

❌ Trim kit is additional cost

❌ Doesn't work with Nest Temperature Sensors

Read more: Best Value: Google Nest Thermostat Review (2025 Update)

4. Best for Smart HomeEcobee Smart Thermostat Premium#

• Smart home compatibility: Amazon Alexa, Apple Homekit, Samsung SmartThings, Google Assistant, IFTTT
• C-wire required: Yes, may be able to get around with power extender
• Dimensions: 4.09 x 4.09 x 1.02 inches

While the Nest aims to be easy and hassle-free, the Ecobee Smart Thermostat Premium is more about creating an incredibly feature-rich system. This is a smart thermostat that can do far more than just turn on the heating. It can even provide air quality monitors and use motion detectors to double as a home security system.

Its highly responsive touchscreen feels just right and gives you control of a plethora of settings. With a C-wire connection built in, this thermostat is designed for modern homes that have AC, heating, and a fan system wired in. It can even control other devices, like a humidifier.

Ecobee's scheduling may seem confusing at first, but it's nice once you get the hang of it. Instead of merely setting temperatures based on time of day, you set your desired "comfort zones" for different instances: Like setting the AC to 76 degrees when you're at home, 80 when away, 74 when sleeping, and so on. Then you schedule those comfort settings for certain times of day, or assign them to Ecobee's external room sensors, one of which comes with the Premium model.

For example: You could set the Ecobee to switch to "sleep" temperature when your toddler is napping in the afternoon, and it will use the sensor in the toddler’s room to determine the temperature, rather than the thermostat's sensor in the living room.

Options like this make the Ecobee extremely powerful, alongside its geofencing features and other eco-monitoring options. Beyond its internal features, it’s also highly compatible with smart home ecosystems.

It includes Alexa and Siri voice controls built right in, and provides additional compatibility with Apple Home Kit, Samsung SmartThings, Google Assistant, and IFTTT. If you’re looking for a smart thermostat that can act as a hub for your whole home’s smart ecosystem, then this is the one.

Pros:

✔️ Great smart features

✔️ Multiple HVAC system control

✔️ Useful zone scheduling

Cons:

❌ Pricey

❌ Requires specific wiring

Read more: Best for Smart Home: Ecobee Smart Thermostat Premium (2025 Review)

5. Best with Motion SensorEcobee Smart Thermostat Enhanced#

• Smart home compatibility: Amazon Alexa, Apple Homekit, Samsung SmartThings, Google Assistant, IFTTT
• C-wire required: Yes, may be able to get around with power extender
• Dimensions: 4.09 x 4.09 x .94 inches

The Ecobee Enhanced is a new mid-level thermostat from Ecobee, a slight step below the Ecobee Premium. The Enhanced has most of the same features as the Premium, minus air quality sensing and built-in Alexa/Siri. It also does not include an external room sensor like the Premium does.

If you own an older home with a basic, heat-only, 2-wire system, you will not be able to install the Ecobee without installing a C-wire first. However, the Ecobee Enhanced smart thermostat is a dual Wi-Fi device and will work on both 2.4 and 5 GHz networks. This means that you shouldn't have to worry about your type of home Wi-Fi when setting it up.

The touch interface on the thermostat is simple and intuitive. We used a thermometer with a NIST certificate of calibration to double-check the accuracy of the thermostat temperature setting and found that it was highly accurate. Switching between heating and cooling modes or adjusting preferred temperatures is easy.

The basic thermostat has a temperature sensor, plus humidity and motion sensors. If you don't have added sensors, the thermostat is only monitoring conditions at the hard installation point. Extra sensing is potentially important in a larger home, but it’s not a big deal if you're in a smaller, open-plan space.

Pros:

✔️ Excellent temperature regulation

✔️ Radar sensor detects when you are home

✔️ Wide smart home compatibility

Cons:

❌ Can not be installed in a heat-only 2-wire system

Read more: Best with Motion Sensor: Ecobee Smart Thermostat Enhanced 2025