A smart thermostat is the single highest-ROI smart home upgrade you can make. According to Department of Energy data, you can save up to 10% per year just by turning your thermostat back 7–10°F for 8 hours per day. Smart thermostats do this automatically, learning your schedule and optimizing for comfort and efficiency simultaneously.
1. Nest Learning Thermostat 4th Gen – Best Overall
The latest Nest Learning Thermostat features a redesigned display with a larger screen and more intuitive interface. It still learns your schedule automatically within a week, and Google Home integration allows voice control and geofencing. The new matter compatibility ensures it'll work with all future smart home systems.
2. Ecobee SmartThermostat Premium – Best for Multi-Room Comfort
Ecobee's SmartSensor technology extends temperature monitoring to individual rooms, solving the common problem of the thermostat room being comfortable while other rooms aren't. The built-in Alexa speaker adds another layer of utility, and the SmartThermostat Premium now includes air quality monitoring.
3. Honeywell Home T9 – Best for Reliability
Honeywell has been making thermostats for over 100 years, and the T9 brings that reliability into the smart home era. Smart Room Sensors communicate wirelessly with the thermostat, and the Resideo app provides detailed energy reports. Compatible with virtually every HVAC system including heat pumps, multi-stage, and dual-fuel.
4. Emerson Sensi Touch 2 – Best Value Smart Thermostat
For budget-conscious shoppers who want smart features without the premium price, the Sensi Touch 2 offers app control, scheduling, geofencing, and Alexa/Google integration at a fraction of the cost of the top picks.
5. Johnson Controls GLAS – Most Stylish
The GLAS's translucent OLED touchscreen is genuinely beautiful — it looks like a modern art installation rather than a thermostat. Beyond aesthetics, it monitors indoor and outdoor air quality and integrates with Cortana and other smart home systems.
6–10: Complete Rankings
The Bosch Connected Control (best for European systems), Amazon Smart Thermostat (best budget pick), ecobee SmartThermostat Enhanced (best Alexa integration), Lux Kono Smart (best apartment choice), and Mysa Smart Thermostat for Electric Baseboard (best for electric heat) round out our top 10.
Smart Thermostat Buying Guide
Compatibility: Check the manufacturer's compatibility checker before buying. Heat pumps and multi-stage systems require specific models.
C-Wire: Most smart thermostats require a common (C) wire. Check your current thermostat's wiring before purchasing.
Smart Home Ecosystem: Choose a thermostat that integrates with your existing ecosystem (Google Home, Amazon Alexa, Apple HomeKit).