The Best Smart Thermostats We’ve Tested for 2025

The Ecobee Smart Thermostat Premium is one of the most full-featured smart thermostats available. It supports five different smart home platforms (Amazon Alexa, Apple HomeKit, Google Assistant, IFTTT, and Samsung SmartThings), monitors air quality, and can work as a home security device and a smart speaker. It also does a terrific job of controlling your HVAC system.

Versatility seekers: Since it does much more than just control your heating and cooling, this is a top choice for anyone willing to pay a premium for versatility. This stylish device houses an air quality monitor, comes with a remote room sensor, and can function as both a home security hub and a standalone Alexa-powered smart speaker. It works with most 24V HVAC equipment, including conventional gas and oil furnaces, air conditioning systems, heat pumps, boilers, humidifiers, dehumidifiers, and ventilators.

Platform-agnostic users: No other smart thermostat we’ve tested supports as many smart home platforms, which is particularly helpful if you have a hybrid setup or enjoy experimenting with the latest features each platform has to offer. While it lacks Matter integration, its broad support for third-party devices means it should still work with all your other connected gadgets.

People who care about air quality: The inclusion of an air quality sensor is highly uncommon, but very sensible, as it means one less device to buy, and thermostats tend to be located in key areas of the home. The air quality sensor monitors VOC (volatile organic compounds), humidity, and carbon dioxide levels, and sends an alert when these measurements are in an unhealthy range.

Ecobee’s most affordable smart thermostat allows you to control your home’s temperature from your phone, by voice, or via its touchscreen. It works with the most popular smart home automation platforms for voice control and third-party device integrations, offering energy usage reports and Eco+ settings for automated savings. Additionally, it can optionally be paired with remote room sensors (sold separately) for consistent temperature control throughout your home.

Budget-minded buyers: The Ecobee Smart Thermostat Essential is a great choice for homeowners on a tight budget. It doesn’t offer built-in Alexa smart speaker functionality or air quality monitoring like Ecobee’s Premium thermostat, but it worked flawlessly in testing, making it easy to control the temperature using the app, touch screen, and voice commands. It supports remote room sensors (sold separately) and can also serve as a home security hub when paired with other Ecobee devices. Additionally, it provides energy usage reports that can help you reduce your energy consumption.

Homeowners who need versatile compatibility: This thermostat works with most 24V gas, oil, heat pump, electric, forced air, and conventional HVAC systems and supports two heating/one cooling or one heating/two cooling stages. Installation requires a C (common) wire; however, a Power Extender Kit ($24.99) can be purchased as a workaround. It supports Alexa, Google, and HomeKit for voice control, as well as third-party device integrations.

With a gorgeous design, the entry-level Nest Thermostat allows you to control your heating and cooling system remotely via phone or voice, set temperature schedules, and offers energy-saving features that can help lower your energy bill. Unlike its pricier sibling below, it doesn’t automatically learn your temperature preferences and set schedules, but it can walk you through the process of manually creating them.

Budget-minded Google and Nest users: This is a top pick for anyone shopping for a smart thermostat on a budget. It’s ideal if you have a smart home built around Google Assistant, especially if you use other Nest devices, since they are all designed to work together. However, its Matter support means you can also integrate it with other smart home platforms. Be aware of its limitations, though, like a lack of support for three-stage heating systems, automatic scheduling, and remote room sensors.

Design fans: Although the Nest Thermostat doesn’t include a touch screen, its mirrored display and clean lines make it one of the better-looking smart thermostats we’ve tested. Controlling it via the capacitive pad on the edge is easy, keeping fingerprints at bay. It comes in a range of attractive colors, including white (Snow), peach (Sand), dark gray (Charcoal), and green (Fog).

It was inevitable that Amazon would add smart thermostats to its extensive lineup of smart home devices, and the Amazon Smart Thermostat is a solid budget pick. At $80, it’s one of the cheapest options out there, and if you use Alexa to control your smart home, it has you covered. It doesn’t work with Google Assistant, IFTTT, or Matter, though.

Budget-minded Alexa users: The Amazon Smart Thermostat is best for budget shoppers who already have a home built around Alexa (and Ring) devices. It doesn’t integrate well with other devices, but if you have an Echo, it’s a budget-friendly option that works well with Alexa voice commands.

Minimalists: With its white exterior and understated design, this smart thermostat is meant to blend in rather than stand out. It lacks some niceties of more expensive models, such as remote room sensors, but it supports scheduling, works with hunches that will adjust the set point when Alexa detects you’re away or asleep, and provides energy usage reports.

Nest was one of the first major smart thermostat brands and is still one of the best. The fourth-generation Nest Learning Thermostat utilizes AI to create personalized heating and cooling schedules, helping you reduce your energy usage. Its gorgeous design is a big aesthetic upgrade from most traditional thermostats, and it comes with a remote room sensor to ensure even temperatures throughout your home. Like the standard model, it supports Matter, allowing you to integrate it with various smart home platforms.

Automation fans: If you’re looking for a thermostat that learns from your behavior and then automatically adjusts, and you want premium features like AI-powered scheduling and remote room sensing, the fourth-generation Nest Learning Thermostat is a top choice. It works with the Google Home app (available on Android and iOS) and supports Google Assistant voice commands, as well as Matter, which enables integration with Amazon Alexa, Apple Home, and Samsung SmartThings ecosystems, allowing for control through those respective apps.

Design lovers: Available in Polished Gold, Obsidian, or Silver, the fourth-generation Nest Learning Thermostat features an attractively designed mirrored display and a stainless steel bezel. If your old thermostat is an eyesore, this should be a big aesthetic and functional upgrade.

Honeywell has been making thermostats for longer than computers have used electricity, and it shows. The company’s high-end Home T9 Smart Thermostat is packed with features, including a remote room sensor included in the box, allowing you to monitor two areas of your house simultaneously without purchasing additional sensors. It’s also easy to install and features a large, user-friendly touch screen.

Owners of large homes: The Honeywell Home T9 makes it easy to maintain uniform temperatures throughout your home. You can add up to 20 remote room sensors that help reduce heating costs by informing the T9 whether a room is occupied or unoccupied. The thermostat is compatible with most standard HVAC systems and features push-to-connect wire terminals for heating and cooling, as well as auxiliary terminals for accessories such as heat pumps and fans.

Alexa and Google fans: This thermostat offers fairly flexible smart home integration, compatible with Alexa, Google Assistant, and IFTTT, although its triggers for the latter are somewhat limited.

If a dial and simple temperature display are too old-fashioned for you, the Sensi Touch 2 relies entirely on a 4.3-inch color touch screen to control your heating and air conditioning. It features the largest touch screen we’ve seen on a smart thermostat, and its interface is designed around it. It can also work with up to 15 room sensors for whole-home temperature monitoring.

Hands-on users: While most smart thermostats have rudimentary interfaces and only display basic information, leaving you to fine-tune settings via their apps, the Sensi Touch 2 features a large, responsive, color touch screen.

Those with large homes: The thermostat supports up to 15 room sensors for balanced temperatures throughout your home. As a downside, you’ll have to buy them separately, and at $39.99, the cost can add up if you need a lot of them.

The Sensi ST55 is the rare budget-friendly smart thermostat that supports Apple HomeKit. While it doesn’t look particularly advanced (or like a smart thermostat at all, with its flat, rectangular face and monochrome LCD), it can work with all the major smart home automation platforms. It even supports geofencing, which sets the thermostat back three degrees when you leave a three-mile radius of your home.

Apple users on a budget: If you’re a dedicated Apple fan and you want to use Siri to control your home’s temperature, the ST55 is one of the more affordable options. In addition to HomeKit and Siri, it works with the Alexa, Google, SmartThings, and Wink home automation systems.

Traditionalists: It’s also the best choice if you prefer a model that resembles a conventional thermostat rather than a smart home device. Its LCD offers a wealth of information, including Wi-Fi and battery level indicators, the current time, the current set temperature and mode (heating, cooling), and the current room temperature.

The Sinope TH1123WF is a smart thermostat designed specifically for line-voltage electric heating systems. If that doesn’t dissuade you, it’s an inexpensive way to add Wi-Fi control to your home’s heating system, along with support for Alexa, Google Assistant, and HomeKit.

Homes with line-voltage heating: This device is designed exclusively for use with line-voltage electric heating systems (such as electric baseboards), which most smart thermostats don’t support. If you use that type of system and don’t want to spend a lot of money on a smart thermostat, it’s an excellent option.

Platform-agnostic users: While the Sinope TH1123WF is only designed for line-voltage heating, it supports most smart home ecosystems, including Alexa, Apple HomeKit, Google Assistant, and SmartThings.