10 Best Alexa Smart Thermostat 2025 in the United States

The Amazon Smart Thermostat is a notable choice for those looking to upgrade from a traditional thermostat to a smart one, particularly if you are already invested in the Amazon ecosystem. One of its primary strengths is its compatibility with Alexa, allowing for seamless voice control and integration with other Alexa-enabled devices such as Echo and Ring. The thermostat also supports automatic temperature adjustments based on whether you're home or away, which can help save on energy bills, aligning well with its ENERGY STAR certification and potential rebates from energy providers.

Installation is made user-friendly with guided steps through the Alexa app, although some users might need additional tools like a power drill and a C-wire or power adapter kit, which could be a drawback for those without these necessities or less DIY experience. The user interface is straightforward, featuring three touch buttons for simple on-device control, but for full functionality, you'll need to rely on the Alexa app or voice commands since it lacks built-in microphones. Another benefit is the ability to use Echo devices as temperature sensors, which can help maintain a consistent climate throughout your home.

The device only supports 2.4 GHz Wi-Fi networks, which might limit connectivity options for some users. It is also not compatible with 110-240V HVAC systems, like electric baseboard heaters, which limits its use to more common 24V systems. The Amazon Smart Thermostat is a reliable option with a strong feature set, especially for those who are already comfortable using Alexa and seek to integrate more smart home functionalities.

The Google Nest Learning Thermostat - 3rd Gen is a strong contender in the smart thermostat category. One of its standout features is its compatibility with Alexa, allowing for seamless voice control. This makes it very convenient for users who prefer hands-free operation. The thermostat's ability to learn your schedule and automatically adjust the temperature (Auto-Schedule) is another major plus, eliminating the need for manual programming and potentially leading to significant energy savings. The Home/Away Assist feature ensures that the thermostat adjusts the temperature when the house is empty, further enhancing its energy efficiency.

Remote control through the Nest app is a useful feature, enabling you to adjust settings from anywhere, which adds to the convenience factor. The user interface of the thermostat is intuitive and user-friendly, making it easy to navigate and operate. Integration with other smart devices is also well-supported, as it works not only with Google Assistant and Amazon Alexa but also with other smart home ecosystems.

However, there are a few drawbacks to consider. The initial setup and installation might be slightly challenging for non-tech-savvy users, despite the availability of online compatibility checkers and guides. Additionally, while the device offers robust features, the price point might be a bit steep for some users. The thermostat’s reliance on a Wi-Fi connection means that any issues with your internet could affect its performance. In summary, the Google Nest Learning Thermostat - 3rd Gen is an excellent choice for those looking for a smart, energy-efficient, and highly compatible thermostat, but be prepared for a potentially complex installation process and a higher upfront cost.

The ecobee Smart Thermostat Premium is a top-notch option in the Alexa-smart-thermostat category, offering robust compatibility and voice control with Siri, Alexa, and Google Assistant. Its ability to save up to 26% annually on heating and cooling costs, along with its ENERGY STAR certification, makes it an attractive choice for energy-conscious users. The included SmartSensor helps to eliminate hot or cold spots in your home, ensuring a more comfortable environment.

Additionally, the built-in air quality monitor provides alerts and tips on maintaining good air quality, adding another layer of home health monitoring. Installation is user-friendly, especially with the included Power Extender Kit for homes without a C-Wire, and the vibrant display with a cinematic interface offers a modern look and intuitive user experience. The thermostat also functions as a home monitoring hub, with features like smoke alarm detection and alerts for possible break-ins, though some of these features require the ecobee Smart Security plan.

Integration with other smart devices is seamless, and remote access via the app provides convenience and control from anywhere. However, some users might find the dependency on additional subscriptions for certain features a downside. The inclusion of a smart speaker allows for voice control and streaming music directly from the thermostat, enhancing its multifunctionality. The ecobee Smart Thermostat Premium is a comprehensive smart thermostat with excellent energy-saving capabilities, easy installation, and extensive smart home integration, though potential additional costs for full feature access should be considered.