The 10 Best Smart Thermostat of 2026

The Emerson Sensi Touch Smart Thermostat (ST75) is a sophisticated home climate control solution that brings together modern design, energy efficiency, and user-friendly operation. With its bright color touchscreen display and intuitive interface, it offers a significant upgrade over traditional programmable thermostats. Designed for homeowners who value both convenience and privacy, this thermostat allows remote control via a dedicated mobile app and works seamlessly with popular smart home ecosystems like Alexa and Google Home.

Installation is straightforward for DIY enthusiasts, thanks to the built-in level, illuminated easy-click terminals, and step-by-step app instructions. However, it does require a common wire (C-wire) for power, which may necessitate additional wiring in older homes. The ENERGY STAR certification and usage reports help users save an average of 23% on HVAC energy, which can offset the initial cost over time. The smart maintenance feature sends alerts for filter changes and equipment issues, helping to prolong the life of your HVAC system.

A standout aspect is Sensi's commitment to data privacy: they explicitly state they will not sell your personal information to third parties, a refreshing approach in the smart home market. The large color display is easy to read from across the room and offers customizable backlighting. Available in black, white, and silver, it blends with most home décor. While some users may miss a built-in battery backup for power outages, the overall reliability and performance of the Sensi Touch make it a top recommendation for anyone looking to upgrade to a smart thermostat.

The Sensi Smart Thermostat ST55 is a Wi-Fi enabled programmable thermostat designed for easy DIY installation and energy savings. Manufactured by Emerson, a company with over a century of HVAC experience, this thermostat offers a reliable and straightforward upgrade for any home.

Ideal for homeowners who want a simple, no-frills smart thermostat, the Sensi ST55 focuses on essential features: flexible scheduling, remote access via the Sensi app, and smart maintenance alerts. It is Energy Star certified and can help save up to 23% on HVAC energy costs.

Standout features include privacy protection (Sensi does not sell personal data), a built-in level for easy wall mounting, and compatibility with Alexa for voice control. The thermostat fits into the same space as a traditional thermostat, eliminating the need for drywall patching.

Design is functional with buttons and a backlit display, but lacks a touchscreen color display. Installation is straightforward for most systems, and a C-wire is not required in many cases. The Sensi app provides usage reports and filter reminders.

Drawbacks include limited smart home integration (only Alexa is confirmed) and no geofencing or occupancy-based automation. Overall, the Sensi ST55 is a solid choice for those seeking a reliable, privacy-conscious, and energy-saving thermostat without unnecessary complexity.

The ecobee Smart Thermostat Enhanced is a smart, programmable thermostat designed to reduce energy consumption and enhance home comfort. It uses built-in radar to detect occupancy, automatically adjusting temperatures when you're away or asleep, potentially saving up to 26% on heating and cooling costs. This makes it an excellent choice for homeowners who want to lower their energy bills without sacrificing comfort.

This thermostat works seamlessly with major smart home ecosystems, including Apple HomeKit, Amazon Alexa, Google Assistant, and SmartThings. You can control it via voice commands or the ecobee app from anywhere, using your smartphone, tablet, or Apple Watch. The device also learns your temperature preferences and schedule over time, ensuring your home is always at the ideal temperature when you need it.

Installation is straightforward for most users, thanks to the included Power Extender Kit (PEK) and Trim Kit. It is compatible with 90% of 24VAC HVAC systems, including gas, oil, electric, dual fuel, and forced air systems. The thermostat is hardwired, eliminating the need for battery replacements, and is backed by a 3-year warranty for added reliability.

One potential drawback is that it may not work with all HVAC systems, particularly line voltage or millivolt systems, so it's essential to check compatibility before purchasing. Additionally, while it includes many advanced features, it lacks an air quality monitor, which is available on the higher-end Premium model. However, for most households, this thermostat offers an impressive balance of smart features, energy savings, and ease of use.

Overall, the ecobee Smart Thermostat Enhanced is a top-tier choice for anyone looking to upgrade to a smart thermostat that delivers real energy savings and integrates smoothly with their existing smart home setup. Its combination of radar occupancy sensing, learning capabilities, and broad compatibility makes it a worthy investment for eco-conscious homeowners.

The Honeywell Home X7S Smart Wi-Fi Programmable Thermostat is a feature-rich upgrade for any modern home. With a sleek 4.3-inch customizable touchscreen display, it offers enhanced visibility and allows you to match the idle screen color and style to your decor. The built-in occupancy sensor intelligently adjusts settings to maximize comfort when you are home and save energy when you are away, making it ideal for busy households.

Beyond temperature control, the X7S monitors humidity levels to help maintain optimal indoor air quality. While additional HVAC equipment may be required for full humidity control, this feature adds a layer of comfort that standard thermostats lack. The thermostat works with up to 3 heat/2 cool heat pump systems with electric backup or 2 heat/2 cool conventional systems, but it does not support electric baseboard heat.

Smart home integration is seamless with Matter certification and compatibility with Amazon Alexa, Google Assistant, and Apple Home. You can adjust settings remotely via the First Alert app, and the thermostat can also work with other Resideo smart home products. The ENERGY STAR certification helps reduce energy use and may qualify you for rebates.

Installation requires a C-wire, but a voucher for a free Honeywell Home C-Wire Adapter is included in the box if your system lacks one. The thermostat does not come with room sensors, but they are available separately for multi-room temperature control. Overall, the X7S is a solid choice for those wanting a smart thermostat with a large display, occupancy sensing, and broad smart home compatibility.

The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat is a feature-rich smart thermostat designed to bring modern convenience and energy efficiency to your home. With its customizable color touch screen, you can match the display to your decor, while the 7-day programmable scheduling allows you to set heating and cooling patterns that fit your lifestyle. This thermostat is ENERGY STAR certified, helping you save on energy bills and potentially qualify for utility rebates.

This thermostat is ideal for homeowners who want to upgrade to a smart home system without a complex installation process. It works with Amazon Alexa and Google Home for voice control, and the free mobile app lets you adjust temperatures remotely. The Smart Response Technology learns your preferences over time, automatically adjusting to keep you comfortable while optimizing energy use.

Key features include a bright, easy-to-read touch screen, daily and 5-day weather forecasts, and intelligent alerts for filter changes and extreme temperatures. The fan control offers On, Automatic, and Circulate modes. However, it requires a C-wire for power and is only compatible with low-voltage HVAC systems (not line voltage baseboard heating).

In terms of design, the thermostat is sleek and the color display is a standout feature. Installation is straightforward for DIYers, but the C-wire requirement may necessitate a power adapter for older homes. The 2.4 GHz WiFi limitation is minor but could affect connectivity in some setups.

Overall, the Honeywell Home RTH9585WF is a reliable and versatile smart thermostat that delivers on its promises. It's a great choice for those looking to save energy and enjoy smart home integration, provided their system meets the compatibility requirements.

The ecobee Smart Thermostat Premium is a top-tier smart home device that combines energy efficiency with advanced voice control. It features built-in Siri and Alexa, allowing you to adjust temperature, play music, and control other smart devices hands-free. The included SmartSensor helps eliminate hot and cold spots by focusing on the most important room, ensuring consistent comfort throughout your home.

This thermostat is designed for homeowners who want to reduce their energy bills without sacrificing comfort. It is Energy Star certified and can save up to 26% on heating and cooling costs annually. The built-in air quality monitor alerts you to poor air conditions and reminds you when to change your furnace filter, promoting a healthier living environment.

The premium metal design features a large, vibrant display with a cinematic interface that looks great on any wall. It also includes radar technology for occupancy sensing and security. The thermostat is compatible with 95% of HVAC systems, and the included Power Extender Kit ensures easy installation even in homes without a C-Wire.

One drawback is that Siri requires an Apple home hub to function, which may be an additional cost for some users. Additionally, the doorbell camera integration requires purchasing the ecobee Smart Doorbell Camera separately. The price is higher than basic thermostats, but the features and energy savings justify the investment for many.

Overall, the ecobee Smart Thermostat Premium is an excellent choice for tech-savvy homeowners looking to enhance their smart home ecosystem while saving energy. Its combination of voice assistants, room-specific sensors, and air quality monitoring makes it a standout product in the smart thermostat market.

The Google Nest Thermostat is a smart thermostat designed to help you save energy and stay comfortable. It is a programmable WiFi thermostat that can be controlled from anywhere using the Google Home app. The thermostat is easy to install yourself, usually in 30 minutes or less, and works with 85% of HVAC systems without needing a C-wire.

This thermostat is ideal for homeowners who want an affordable entry into smart home energy management. It offers features like auto-scheduling, remote control, and energy-saving suggestions through Savings Finder. The thermostat also supports HVAC monitoring, alerting you to potential issues with your heating and cooling systems.

Key features include the ability to turn itself down when you leave home, voice control with Google Assistant and Alexa, and compatibility with Nest Renew for clean energy support. The design is minimalist with a swipe bar for temperature adjustments, though it lacks a full touchscreen display.

While the Nest Thermostat is easy to install for most homes, some systems may require a C-wire or power accessory. Additionally, Nest Renew is only available in certain areas and with specific utility rates. Overall, it is a solid choice for those looking to reduce energy bills and enjoy smart home convenience.

The Sensi Lite Smart Thermostat (ST25) is a no-fuss WiFi thermostat designed for DIY installation. It works with most HVAC equipment and often does not require a common wire, making it an approachable upgrade for first-time smart thermostat buyers.

Setup is guided by step-by-step instructions and a built-in level, so you can mount it confidently. Once installed, the top-rated Sensi mobile app for iOS and Android lets you adjust temperature, create flexible schedules, enable geofencing, and monitor usage from anywhere via 2.4 GHz WiFi.

Alexa compatibility adds hands-free voice control, while Energy Star certification supports its claim of saving about 23 percent on HVAC energy. Sensi also emphasizes privacy protection, stating it will not sell personal information or use thermostat activity data for ads.

One key limitation is that heat pumps and heat/cool-only systems require a C-wire. The thermostat also relies on 2.4 GHz WiFi, so households with only 5 GHz networks may need to adjust their router settings.

Overall, the Sensi Lite is a reliable, affordable smart thermostat for anyone who wants simple remote comfort control and energy savings without a complicated install.

The ecobee Smart Thermostat Essential is a budget-friendly addition to the ecobee family, offering a compelling balance of smart features and energy savings. It's designed for homeowners who want to reduce their heating and cooling costs without a hefty upfront investment. With Energy Star certification and the ability to save up to 23% annually, it can pay for itself in about six months, making it a smart financial choice.

Installation is straightforward for most homes, thanks to the compatibility checker that ensures your HVAC system works. The thermostat supports a wide range of 24VAC systems, including gas, oil, electric, and heat pumps. If your home lacks a C-wire, the Power Extender Kit (sold separately) solves that, and the trim kit keeps walls neat. The touchscreen and app make adjustments simple, and voice control works with Alexa, Google Assistant, and Apple HomeKit.

The eco+ features are a standout, automatically adapting to your schedule to optimize comfort and savings. You can also monitor energy usage on the go. While the thermostat is not compatible with high-voltage or millivolt systems, and the Wi-Fi is 2.4 GHz only, these are minor drawbacks for most users. The 3-year warranty and expert support add peace of mind.

Overall, the ecobee Smart Thermostat Essential is an excellent choice for those wanting a reliable, energy-efficient smart thermostat that won't break the bank. It's especially suited for tech-savvy homeowners who are comfortable with a DIY installation and want to take advantage of smart home integration.

The Amazon Smart Thermostat is a cost-effective and energy-efficient solution for homeowners looking to upgrade from a traditional thermostat. It is designed to work seamlessly with Alexa and Ring, allowing you to control your home's temperature using voice commands or the Alexa app. The thermostat is ENERGY STAR certified, which means it meets strict energy efficiency guidelines set by the EPA. According to EPA estimates, ENERGY STAR certified thermostats save an average of $90 on yearly energy bills, making this a smart investment for those looking to reduce energy costs.

One of the standout features of the Amazon Smart Thermostat is its ability to create comfort zones throughout your home. By connecting to select Alexa devices, the thermostat can automatically adjust heating and cooling based on temperature readings or presence detection. This ensures that you are only heating or cooling the rooms you are using, further maximizing energy savings. The thermostat also offers programmable schedules, allowing you to set home, away, and sleep schedules, or let Alexa automatically control the temperature with Alexa+ advanced features.

Installation is designed to be do-it-yourself, with the Alexa app guiding you through the process step by step. Customer service is also available if you need assistance. The thermostat requires a C-wire for power, so it is important to check your HVAC system's compatibility before purchasing. The device is built with Honeywell Home Thermostat Technology, backed by 130 years of experience, ensuring reliable performance and durability.

While the Amazon Smart Thermostat offers excellent smart home integration and energy savings, it does have a few drawbacks. The requirement for a C-wire may limit compatibility with older HVAC systems. Additionally, the thermostat lacks a touchscreen display, so all control is done through the Alexa app or voice commands. It is also limited to the Alexa ecosystem, meaning it does not natively support Google Home or Apple HomeKit. However, for those already invested in the Amazon ecosystem, this thermostat is a great choice.

Overall, the Amazon Smart Thermostat is a reliable and affordable option for homeowners who want to save energy and money while enjoying the convenience of smart home automation. Its ease of installation, proven energy savings, and integration with Alexa and Ring make it a compelling choice. If you are looking for a smart thermostat that is simple to set up and offers significant energy savings, this is a product worth considering.