10 Best Smart Thermostats 2025 in the United States

The Amazon Smart Thermostat is a solid choice for anyone looking to upgrade from a traditional thermostat to a smart option that helps save money and energy. One of its key strengths is its compatibility with Alexa and Ring, which allows for easy voice control and integration into your smart home ecosystem. The thermostat’s learning capabilities are impressive; it can adapt to your schedule and preferences over time, optimizing temperature settings automatically based on your presence at home. The energy-saving features, including potential rebates from energy providers, make it appealing for those looking to lower utility bills.

Installation is designed to be user-friendly, with guidance available through the Alexa app, making it accessible even for those who might not be particularly handy. The ability to monitor energy usage and receive automatic reminders for air filter replacements adds another layer of convenience.

There are some limitations to consider. The requirement for a C-wire for installation might be a hurdle for some users, particularly in older homes where this wiring isn’t always standard. It's also worth noting that while it works with 2.4 GHz networks, it does not support 5GHz connections, which may limit compatibility with some modern routers. Additionally, while the thermostat can work with temperature sensors through compatible Echo devices, it does not include a built-in microphone, meaning you will need to rely on an Alexa-enabled device for voice commands. The reliance on the Alexa app for many features may also deter those who prefer a more standalone experience.

The ecobee Smart Thermostat Premium is a versatile and user-friendly option for smart control of home heating and cooling. It supports Wi-Fi connectivity and integrates well with popular voice assistants like Siri and Alexa, enabling easy voice commands and remote control via your smartphone. A key feature is the included SmartSensor for doors and windows, which monitors entry and motion while adjusting the temperature in key rooms to reduce uncomfortable hot or cold spots. This can improve comfort and potentially save energy, with ecobee claiming up to 26% annual savings on heating and cooling costs.

Additional features include a built-in air quality monitor that alerts you to poor indoor air quality and reminds you when it’s time to change your furnace’s filter, helping maintain a healthy home environment. The thermostat is ENERGY STAR certified, ensuring it meets efficiency guidelines. Installation typically requires hardwiring, so basic electrical work or professional assistance might be necessary. The LCD display with backlight and built-in speaker enhance usability, and smart scheduling features allow customization of temperature settings to fit daily routines.

Some advanced features, such as customizable security alerts for motion or entry, require a subscription to ecobee Smart Security, which is an additional cost. Also, the hardwired power source requirement may limit installation options in some homes. This thermostat is well suited for homeowners seeking a smart, energy-saving device with advanced comfort controls, air quality monitoring, and compatibility with voice assistants or integrated home security.

The Google Nest Learning Thermostat 3rd Gen is a solid choice for anyone looking to upgrade their home's heating and cooling control with smart features. It works with about 95% of heating and cooling systems, making it a good fit for most homes. One of its key strengths is the learning capability—it studies your temperature preferences and daily schedule, then programs itself to save energy while keeping you comfortable. Remote access is well-developed, allowing you to adjust settings from your phone, tablet, or computer from anywhere. The thermostat provides useful energy reports, showing your usage history and helping you understand when and why energy is consumed. Integration with smart home systems like Alexa and Google Assistant is smooth, enhancing voice control and automation options. The Home/Away Assist feature uses your phone's location to adjust settings automatically when you leave or return, which helps reduce wasted energy. Installation is designed to be straightforward, usually taking around 30 minutes with all necessary tools included.

On the downside, the thermostat requires a Wi-Fi connection to unlock most smart features, so limited or unstable internet could reduce its benefits. Also, while the Nest Temperature Sensor can improve room-specific comfort, it is sold separately, adding to the cost if you want that feature. Geofencing works well for many users but can occasionally be inconsistent depending on phone and network settings. The sleek design and bright display add a nice touch, but some might find the initial setup a bit technical if they’re not comfortable with DIY projects. This thermostat is well-suited for those wanting an energy-conscious, adaptable smart thermostat with strong remote and learning capabilities, particularly if they use Alexa or Google smart home products.