Top 10 Best Smart Thermostats 2025

Save up to 26% per year on heating and cooling costs while being ENERGY STAR certified.
Includes a SmartSensor (valued at $50) that adjusts temperatures in key areas to reduce hot and cold spots compared to a fixed 72°F.
Built-in air quality monitor alerts you to poor indoor air quality, provides improvement tips, and reminds you when to change your furnace filter.
Features a large, vibrant display with a cinematic interface and advanced occupancy sensing for an enhanced user experience.
Acts as a complete home monitoring hub with built-in smoke alarm detection and break-in alerts (ecobee Smart Security plan required).
Comes with an integrated smart speaker that supports voice control via Siri or Alexa, letting you stream Spotify playlists and podcasts (Apple Home Hub required for Siri).
Compatible with most 24VAC HVAC systems—including furnaces, ACs, heat pumps, boilers, PTACs, and fan coil units—and includes a Power Extender Kit for C-Wire-less homes.
Some advanced features, such as break-in alerts and open door/window detection, require additional sensors or subscriptions, which can increase the overall cost and complexity.

Programmable smart thermostat that learns your schedule and preferred temperatures to optimize energy use and comfort.
Home/Away Assist automatically sets an Eco Temperature when you leave, reducing wasted energy.
Remote control capability lets you adjust the thermostat from anywhere using your phone, laptop, or tablet.
Energy History and Nest Leaf indicator provide real-time feedback on energy consumption and encourage energy-saving choices.
HVAC monitoring alerts you to potential issues and sends maintenance reminders for proactive care.
Elegant design features polished metal finishes, a high-resolution display, and Farsight that shows temperature, weather, or time upon entry.
Easy installation in 30 minutes or less, compatible with 95% of heating and cooling systems, and works with Nest Temperature Sensor (sold separately) and Nest Renew for clean energy support.
Additional accessories such as the Nest Temperature Sensor and potential reliance on cloud services may increase overall costs and complexity.

Save up to 23% annually on heating and cooling costs compared to maintaining a constant 72°F.
Control your HVAC system from anywhere using your Android or iOS device.
Enhance comfort by adding a SmartSensor to manage hot or cold spots in the rooms that matter most.
Automatically pauses heating or cooling when a door or window is left open (requires ecobee SmartSensor for doors and windows and a Smart Security subscription).
Recognized as an ENERGY STAR Partner of the Year award winner, ensuring energy efficiency and reliability.
Integrates seamlessly with your preferred smart home system via Wi-Fi (802.11 b/g/n at 2.4 GHz).
Compatible with most 24VAC HVAC systems—including furnaces, ACs, heat pumps, boilers, PTACs, and fan coil units—with a Power Extender Kit included for C-Wire-less homes, and offers secure connectivity with DHCP or static IP addressing and 168-bit SSL encryption.
Additional required accessories (SmartSensor and Smart Security subscription) may increase the overall cost and complexity of the system.

Works exclusively with high/line voltage electric heating systems, including 120–240V electric baseboards and fan-forced heaters.
Not compatible with low-voltage systems or two-wire installations; requires at least four wires, including a neutral or a second live wire.
Supports loads up to 1900W at 120V or 3800W at 240V for reliable performance.
40% smaller design with new features, including adaptive display technology.
Adaptive Brightness Technology adjusts the display brightness with Sleep and Wake on Approach functions.
Integrates seamlessly with Alexa, Google Assistant, and Apple HomeKit for smart home connectivity.
Easy scheduling via the app, allowing you to set up your thermostat in less than a minute.
Compatibility is limited to newer high-voltage systems, so users with older or two-wire baseboard systems must verify functionality before purchase.

Compatible with Sensi Room Sensors for balanced temperature control throughout your home (sensors sold separately).
Committed to privacy protection by not selling your personal information to third parties.
ENERGY STAR-certified Sensi Touch 2 smart thermostat can help save about 23% on HVAC energy costs.
Offers flexible scheduling, remote access, and detailed usage reports to optimize energy efficiency.
Provides smart maintenance features including equipment performance monitoring, alerts, and filter replacement reminders.
Easy DIY installation guided by a top-rated app using universal Bluetooth technology.
Designed to work with HVAC equipment in most homes, though it requires a common wire (c-wire) for proper functionality.
The necessity of a common wire and potential additional costs for room sensors may complicate installation for some users.

Save money and energy with an ENERGY STAR certified thermostat that can be adjusted from anywhere using your mobile device, or automatically through Auto Home/Away Scheduling.
Benefit from potential energy savings rebates and enrollment in local Utility Demand Response Programs to further reduce costs.
Enjoy personalized comfort with Smart Room Sensors that adjust temperatures in specific rooms, helping you live and sleep smarter.
Experience impressive sensor range, with battery-powered Smart Room Sensors utilizing Honeywell Home technology for reliable signals up to 200 ft (range may vary with home construction).
Achieve multi-room temperature control as the T9 Smart Thermostat manages several rooms simultaneously when used with sensors.
Control the thermostat effortlessly using the Resideo app or via voice commands with Amazon Alexa, Apple HomeKit, Google Assistant, and more.
Easy DIY installation with a guided setup process and an included low-voltage power adapter as an alternative to a C-wire, making it compatible with most HVAC systems.
The system requires a C-wire or a compatible low-voltage setup, which may complicate installation in homes without existing C-wire infrastructure.

Programmable smart thermostat that learns your preferred temperatures and programs itself to help you save energy and maintain comfort.
Home/Away Assist automatically adjusts to an Eco Temperature when you leave, preventing wasted energy on an empty home.
Requires Wi-Fi connectivity and a phone or tablet running iOS or Android, managed through the Nest app.
Remote control capability allows family members to change the temperature from anywhere using a phone, laptop, or tablet.
Features HVAC monitoring that alerts you to potential issues with your heating and cooling systems and provides maintenance reminders.
Displays the Nest Leaf when you choose an energy-saving temperature and offers Energy History to track your usage and savings.
Compatible with the Nest Temperature Sensor (sold separately) and works with voice control via Alexa, Google Assistant, and other smart speakers.
Designed to seamlessly blend into any home with a frosted display and easy installation in 60 minutes or less, compatible with 95% of heating and cooling systems.
Additional accessories like the Nest Temperature Sensor are sold separately, which may increase the overall cost.

Privacy Protection: Sensi won’t sell your personal information to third parties.
Easy DIY installation using a built-in level and step-by-step app instructions, compatible with most home HVAC systems without the need for a common wire.
ENERGY STAR-certified to help save about 23% on HVAC energy costs through flexible scheduling, remote access, and detailed usage reports.
Smart maintenance features monitor system performance, provide equipment alerts, and send filter replacement reminders.
Simple configuration that mimics the look and feel of a traditional thermostat, so no patching or painting is required.
Allows remote control from anywhere, enabling you to adjust settings on the go using your smartphone.
User-friendly interface with clearly labeled buttons for intuitive operation.
Supports customizable scheduling to tailor temperature settings to your lifestyle.
Dependence on app-based configuration and remote connectivity may be challenging for users who prefer a more traditional, non-digital thermostat setup.

Hive Heating and Cooling Pack includes one Smart Thermostat and one Hive Hub, and is compatible with up-to-date iOS or Android devices with a recommended internet connection of 1.5Mbps or higher.
Remotely program your thermostat to operate only when your home is occupied or sync with Hive Window/Door Sensors to automatically turn off your system when you leave.
Enables voice control by connecting your Hive devices to Amazon Alexa or Google Home, allowing commands like “set temperature to 75°.”
Features Quick Cool and Quick Heat functions for rapid temperature changes with a single click.
Centralizes control of all your Hive smart home devices through the Hive App, accessible via smartphone, tablet, or laptop.
Provides seamless integration to manage your home’s heating and cooling remotely for enhanced convenience and energy savings.
Designed to bring your home to life by offering flexible scheduling and automated system adjustments based on occupancy.
The system’s optimal performance is heavily dependent on a stable, high-speed internet connection and up-to-date devices, which may limit functionality for users with older technology or unreliable networks.

Easy DIY installation with step-by-step guidance in the Wyze app, typically taking less than 30 minutes.
Compatible with 90% of home heating and cooling systems, and includes a C-wire adapter for homes without a C-wire; check compatibility on the Wyze website.
Control the temperature remotely via the Wyze app, allowing you to adjust settings, turn off the system when away, and share control with guests or family.
Works seamlessly with voice assistants like Alexa and Google Assistant for hands-free adjustments.
Create personalized schedules for Home, Sleep, and Away modes with a 7-day scheduling feature.
Provides usage tracking with actionable energy-saving insights through the Wyze app.
Automatically turns the thermostat on and off based on built-in motion sensors and your phone’s location to conserve energy.
Reliance on a stable Wi-Fi connection and smart home ecosystem may limit functionality in areas with poor connectivity or older devices.