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 2025 ecobee Smart Thermostat Essential offers a lot of features that make it a strong contender in the smart thermostat market. One of its biggest strengths is its compatibility with 85% of HVAC systems, which is quite impressive. This means it can likely work with your existing setup. The thermostat also supports major smart home ecosystems like Siri, Alexa, and Google Assistant, making it easy to integrate into a smart home.

Another major advantage is its energy-saving capabilities, which can help you save up to 23% on heating and cooling costs annually. This is facilitated by its auto-scheduling and auto-away mode features, which adjust the temperature based on your schedule and presence, thus optimizing energy usage. The thermostat also boasts remote access through the ecobee app, enabling you to control the temperature from anywhere. Additionally, the device comes with energy reports to help you monitor consumption and make informed decisions to save more energy.

Installation is relatively straightforward, with an easy DIY setup, although homes without a C-Wire may require the separately sold Power Extender Kit (PEK). On the downside, the need to purchase additional accessories like the SmartSensor for enhanced room-specific monitoring and the PEK for certain installations could be seen as a drawback. Some users may also find the initial cost a bit steep, although the energy savings over time can offset this. It's a well-rounded product that offers significant benefits, especially for those looking to integrate it within a smart home ecosystem and save on energy bills.

The Google Nest Learning Thermostat - 3rd Gen is a standout option in the smart thermostat category, particularly for those looking to enhance their home’s energy efficiency and comfort. Its Auto-Schedule feature allows it to learn your temperature preferences over time, eliminating the need for complex programming, making it user-friendly. The Home/Away Assist is a fantastic addition, as it automatically adjusts settings when you leave, ensuring that energy isn't wasted heating or cooling an empty home.

Remote access through the Nest app gives you control from anywhere, which is really convenient. Plus, the energy reports let you track usage patterns, helping you understand where you can save money on energy bills. The Nest Leaf feature encourages energy-saving choices, promoting eco-friendly habits.

Compatibility is another strong point, as it works seamlessly with Google Assistant and Amazon Alexa, allowing for voice control and integration into your smart home system. The installation is straightforward for most users, but it’s always wise to check compatibility with your heating and cooling system beforehand. Some users may find limitations in its compatibility with certain older HVAC systems. While the price point is reasonable for a smart thermostat, it may still be higher than basic models, which could be a consideration for budget-conscious buyers.