The 8 Best Smart Thermostats of 2021

Best Overall: Ecobee Smart Thermostat with Voice Control

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If you want the top-of-the-line smart thermostat, the Ecobee Smart Thermostat with Voice Control has everything—and does everything. It includes a SmartSensor that you can place in the room that you’re in, and it will balance the temperature to keep that room comfortable. You can also adjust the temperature remotely using the Ecobee App. The thermostat is also ENERGY STAR certified, and the beautiful glass display looks good on any wall. Alexa is built-in, making it easy to connect to a smart speaker to listen to music, make phone calls, or activate other Alexa devices by simply speaking. The thermostat also works with Google Assistant, Apple HomeKit, and other smart home systems. 

Best Budget: Google Nest Thermostat

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If you’re looking for an economical option that still works well, consider the Google Nest Thermostat. It’s also ENERGY STAR certified, so it is designed to decrease your energy consumption. The thermostat has a programmable thermostat, so you can choose specific times for it to come on or go off. However, it can be controlled remotely via your smartphone, tablet, or laptop. In addition, it senses when the home is empty and will adjust the home’s temperature accordingly. The Google Nest Thermostat also monitors the HVAC system and notifies you when there is a problem with the system.

Best for Smaller Homes: Ecobee3 Lite Smart Thermostat

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If you live in an apartment or a smaller house, you may not need all of the features on the Ecobee SmartThermostat with Voice Control. The Ecobee3 Lite is a more economical option that’s still ENERGY STAR certified to help you save on annual energy costs. It doesn’t have voice control, hands-free calling, Alexa Built-in or Spotify and Bluetooth streaming, and it does not include a SmartSensor. However, the thermostat is compatible with Smart Sensor, and it can be controlled with the Ecobee App. In addition, the thermostat is compatible with Alexa, Google Assistant, Apple HomeKit, and several other smart home systems.

Best for Multiple Zones: Honeywell Home T9 Smart Thermostat with Sensor

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The Honeywell Home T9 Smart Thermostat with Sensor is good for controlling the temperature in multiple rooms. Each smart room sensor ensures that the temperature is right in that room—and that’s important because when you’re in the bedroom, you don’t want the temperature to be based on your empty living room. If there are multiple people in your home, you can get multiple smart room sensors to ensure that everyone’s room has a comfortable temperature. The thermostat also uses location-based geofencing to determine when the house is empty and then adjust the temperature accordingly. The thermostat works with the Honeywell App, as well as Alexa, Google Assistant, Cortana, and other voice assistants.

Best Design: Google Nest Learning Thermostat 3rd gen

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What’s not to like about the Nest Learning Thermostat 3rd generation? It is available in a variety of colors, including black, brass, copper, white, and mirror black, so you’re sure to find one that fits your décor style. The thermostat learns your patterns and uses this information to create a schedule, and also uses geofencing to sense when the home is empty and adjusts the temperature accordingly. In addition, it monitors the temperature in multiple zones. The thermostat is compatible with most HVAC systems and easy to install. In addition, the high-resolution display makes it easy to see the temperature from across the room. The Nest Learning Thermostat 3rd Generation Thermostat works with Alexa and Google Assistant.

Best for Apple HomeKit: Honeywell Home T5

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It’s more economically priced than the Honeywell Home T9, but the ENERGY STAR-rated Honeywell Home T5 still has a lot of features. It’s easy to install, works with your smartphone or other mobile devices via the Honeywell Home App, and is also compatible with Alexa, Google Assistant, and Apple HomeKit using Siri. The thermostat also detects when no one is home and adjusts the temperature. Plus, it has 7-day flexible scheduling or location-based temperature control, so when you’re off on vacation, it can suspend your usual settings.

Best with Large Clear Text: Orbit 83521 Clear Comfort Programmable Thermostat

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If your eyesight’s not as good as it used to be, the large display on the Orbit 83521 Clear Comfort Programmable Thermostat is easy to see. The black text is large and well-contrasted against the backlit LCD screen. It’s also easy to use, with simple, well-defined fingertip controls. The thermostat integrates smart system logic designed to ensure that temperatures don’t over-fluctuate. This helps to keep the readings accurate and consistent. The thermostat is easy to install, and it can be programmed for up to 7 days.