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 (4th Gen) is a smart thermostat designed to help you save energy and maintain home comfort with minimal effort. It supports most common heating and cooling systems and often does not require a C wire, making installation straightforward for many homes. The setup process is user-friendly, and it includes useful components such as the Nest Temperature Sensor for managing room-specific temperatures.

You can control the thermostat easily via the Google Home app or with voice commands using Alexa or Google Assistant, providing flexible remote access and hands-free convenience. Its large, clear display adjusts brightness automatically so you can read it from across the room. The thermostat features adaptive learning that adjusts settings based on your habits and outside weather, which helps save approximately 12% on heating and 15% on cooling bills. Additionally, it integrates well with other smart home devices through Matter compatibility.

While compatible with Alexa, the device is primarily designed to work within Google’s ecosystem, so some features may be more seamless when used with Google Home. It uses lithium batteries that will require replacement over time. This thermostat is a solid option for those seeking an energy-efficient, smart-controlled home heating and cooling system that is relatively simple to install and operate, especially if you use Google or Alexa smart devices.