10 Best Voice Controlled Smart Thermostats 2025 in the United States

The Amazon Smart Thermostat is a well-rounded device for those looking to upgrade from a traditional thermostat. It offers seamless integration with Alexa and Ring, allowing for voice-controlled temperature adjustments and remote access via the Alexa app. This makes it highly convenient for users who are already invested in Amazon's ecosystem.

The thermostat supports temperature sensors through compatible Echo devices, which helps in managing hot or cold spots effectively. Made with Honeywell Home Thermostat Technology, it promises reliability backed by 130 years of experience in the industry. The device also boasts ENERGY STAR certification, potentially saving users an average of $50 on yearly energy bills, and includes features like automatic control, which adjusts settings based on whether you're home or away, helping to further reduce energy usage.

However, there are a few limitations. The thermostat requires a C-wire for installation, which may not be present in all homes, necessitating the purchase of a separate power adapter. Additionally, it only supports 2.4 GHz Wi-Fi networks, which might be a drawback for users with 5 GHz networks. There's no built-in microphone, so an Alexa-enabled device is required for voice control. Despite these minor shortcomings, the Amazon Smart Thermostat is an energy-efficient, easy-to-use option for those looking to integrate smart home technology into their daily lives.

The Google Nest Learning Thermostat (4th Gen) is a top-tier smart thermostat designed to improve energy efficiency and home comfort. Its standout feature is its compatibility with a wide range of 24V systems (gas, electric, oil, and more), making it suitable for most homes without needing a C wire. Integration with both Alexa and Google Home ensures seamless voice control, and the Google Home app allows for easy remote access and adjustments from anywhere.

The thermostat's learning capabilities are impressive, as it adapts to your habits and the surrounding environment to optimize temperature settings and save energy. Users can expect to see significant reductions in heating and cooling bills, with average savings of 12% and 15%, respectively. The inclusion of the Nest Temperature Sensor (2nd gen) helps manage hot and cold spots in different rooms by setting specific temperatures for each area.

Additionally, the thermostat features a larger, more readable display with Dynamic Farsight, making it easy to view information from across the room. However, there are a few potential drawbacks. The polished obsidian finish, while sleek, may not suit everyone's taste or home decor. Also, although the device is designed for easy installation, some users may still find it challenging without prior experience. While it offers many advanced features, users must rely on the Google Home app for full functionality, which could be a limitation for those who prefer more direct control options. This product is particularly beneficial for tech-savvy homeowners looking for a stylish, energy-efficient solution that integrates smoothly into a smart home ecosystem.

The Google Nest Learning Thermostat - 3rd Gen is compatible with a wide range of heating and cooling systems (95%), making it a versatile choice for most homes. The thermostat integrates seamlessly with popular voice assistants like Google Assistant and Amazon Alexa, allowing for convenient voice control.

Its standout feature is its learning capability, where it adapts to your schedule and temperature preferences to optimize comfort and energy savings. The Home/Away Assist feature adjusts the temperature when you leave, ensuring no energy is wasted on an empty home. Remote access via the Nest app means you can control the temperature from anywhere using your smartphone, laptop, or tablet, adding a layer of convenience.

The Energy History and Nest Leaf features provide insightful energy reports, helping you understand and reduce your energy consumption. Geofencing is subtly integrated through the Home/Away Assist, enhancing its functionality. The thermostat also offers HVAC monitoring and alerts, adding an extra layer of maintenance support. Design-wise, it features a polished metal finish and a bright, high-resolution display that provides easy access to important information like temperature, weather, and time. However, it's worth noting that the Nest Temperature Sensor, which can help manage specific room temperatures, is sold separately. Additionally, while the thermostat is easy to install for most users, those with less common heating and cooling systems might face compatibility challenges.