10 Best Alexa Compatible Thermostats 2025 in the United States

The Amazon Smart Thermostat is a great option for those looking to upgrade from a traditional thermostat and save on energy costs. It offers strong integration with Alexa, allowing users to control the temperature using voice commands or the Alexa app from anywhere. This thermostat also supports additional temperature sensors through compatible Echo devices, which can help address hot or cold spots in your home. It is designed to save energy, with ENERGY STAR certification indicating potential savings of around $50 annually on energy bills. Moreover, it allows for automatic temperature adjustments based on whether you are home or away, thanks to Alexa's Hunches feature.

Installation is made easier with a guided process through the Alexa app, though some users may need additional tools like a power drill and a level. A C-wire is required for installation, which might be a limitation for some homes without one. The user interface is straightforward, featuring three touch buttons on the device itself. Scheduling options are robust, with the ability to set up to seven different time periods for each day of the week. Remote access is fully supported through both the Alexa and Ring apps.

However, it only supports 2.4 GHz WiFi connections, which may be a drawback for some users with 5GHz networks. Additionally, it's not compatible with 110-240V HVAC systems, limiting its use to specific types of heating and cooling systems. Made with Honeywell technology, it offers reliability backed by a longstanding brand. This thermostat is best suited for tech-savvy users who are comfortable with Alexa and have a compatible HVAC system and C-wire setup.

The ecobee Smart Thermostat Premium stands out in the Alexa-compatible thermostat category due to its extensive features and smart home integration. One of its core strengths is its compatibility with multiple virtual assistants, including Alexa, Siri, and Google Assistant, making it a versatile choice for various smart home ecosystems.

Installation is made user-friendly with the included Power Extender Kit for homes without a C-wire, which ensures broad compatibility with most HVAC systems. The large, vibrant display and intuitive user interface further enhance its attractiveness for users who value ease of use and aesthetic design. Moreover, the thermostat offers robust energy-saving features, claiming up to 26% savings on heating and cooling costs, and comes with an ENERGY STAR certification, which speaks to its efficiency.

The included Smart Sensor helps maintain comfortable temperatures by adjusting settings in key rooms, reducing hot or cold spots effectively. Additional features such as the built-in air quality monitor and smart home security functions, like smoke alarm detection and alerts for potential break-ins, add significant value. Some users may find the reliance on subscriptions (like the ecobee Smart Security plan) to access certain advanced features a bit restrictive. Although the built-in speaker and voice control options provide convenience, sound quality might not match dedicated audio devices. For those who prioritize multi-assistant compatibility, advanced energy-saving options, and home monitoring capabilities, the ecobee Smart Thermostat Premium is an excellent choice. Its ease of installation and user-friendly design make it suitable even for those not particularly tech-savvy, though users should be aware of potential additional costs for full feature access.

The Google Nest Learning Thermostat - 3rd Gen is a smart thermostat that integrates seamlessly with Alexa, offering a hands-free experience for users. One standout feature is its Auto-Schedule capability, which learns from your habits and adjusts itself accordingly, eliminating the need for manual programming. This learning feature, combined with Home/Away Assist, ensures your home is not being heated or cooled unnecessarily, which can result in significant energy savings.

The device is also compatible with the Nest app, allowing you to control the thermostat remotely from anywhere, a great convenience for frequent travelers or those with unpredictable schedules. Additionally, the Energy History tracking feature helps you monitor and optimize your energy usage, with the Nest Leaf providing a visual cue when you're saving energy. The sleek, stainless steel design adds a modern touch to your home decor.

It is important to check compatibility with your HVAC system using the online Nest Compatibility Checker before purchase to ensure it fits your setup. Installation can be relatively straightforward for those with some DIY experience, but may require professional help for others. While the user interface is intuitive, navigating through the app and thermostat settings may take some time to get used to for the less tech-savvy. This thermostat is best suited for users who value energy efficiency, advanced smart home integration, and the convenience of remote control, but it may present a learning curve for those unfamiliar with smart devices.