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 Google Nest Thermostat is a smart, Alexa-compatible thermostat designed to make home temperature control simple and energy-efficient. It connects via Wi-Fi and supports voice commands through Alexa and Google Assistant, allowing easy hands-free adjustments. Installation is generally straightforward, especially as it works without a C wire in most homes, though some heating or cooling systems might require extra wiring or power accessories.

The thermostat stands out for its energy-saving features — it automatically lowers heating or cooling when you leave the house and suggests schedule improvements to save more energy through its Savings Finder. You can set up and manage your heating and cooling schedules easily from the Google Home app on your phone, and remote access lets multiple family members adjust settings from anywhere, which is great if your routine changes often. The LCD screen is clear and simple to navigate, making manual control painless. The Nest also monitors your HVAC system and sends alerts if something needs attention, supporting better maintenance.

One downside is that it doesn’t have a lock feature to prevent accidental changes, which might be a concern in homes with children. Its power source relies on two AAA batteries, which are included, so you don’t have to worry about rewiring for power, but you will need to replace them occasionally. While it’s Energy Star certified and supports clean energy use through Nest Renew, you should verify your system compatibility before buying, as certain setups may need additional hardware. With a solid 4.1-star rating from many users and top rankings in programmable home thermostats, the Nest Thermostat is a user-friendly choice for those wanting smart control, energy savings, and Alexa integration in one sleek, wall-mounted device.

The Google Nest Learning Thermostat (4th Gen) is a smart thermostat compatible with Alexa and various smart home systems, making it a versatile choice for users who prefer voice controls. It supports most common heating and cooling systems and often doesn’t require a C wire, simplifying installation for many homes. The setup process is generally straightforward, especially when using the Nest Compatibility Checker beforehand. The device integrates with the Google Home app for easy remote control, allowing you to adjust temperatures from anywhere and schedule heating or cooling to suit your routine. Its display is larger and easier to read than previous models, with a dynamic design that shows useful information such as time or weather.

Featuring the Nest Temperature Sensor, you can manage temperatures across different rooms to avoid hot or cold spots effectively. The thermostat’s energy-saving capabilities stand out: it learns your schedule and preferences over time and factors in outdoor weather to optimize heating or cooling, potentially reducing energy bills by around 12% to 15%. Notifications for schedule changes help keep you informed and in control. Some users might experience a learning curve initially, particularly if they are new to smart home devices. Additionally, since it relies on Wi-Fi, control options are limited when the internet connection is down.

While it offers compatibility with Alexa, the most seamless experience is typically achieved through the Google Home app, so certain features may vary depending on your smart home setup. This thermostat is an excellent choice for those looking to save energy and enjoy smart controls with Alexa compatibility, assuming your heating system is supported and you have a stable internet connection.