Best Smart Thermostats for 2026
The best smart thermostats to cut your energy bills, ranked for different needs and budgets — from premium picks to the best value.
A good smart thermostat can trim 10–15% off your heating and cooling costs through smarter scheduling, geofencing, and room sensors — often paying for itself within a year or two. These are our top picks for 2026, matched to different homes and budgets.
Our top picks at a glance
- Best overall: ecobee Smart Thermostat Premium
- Best for simplicity: Google Nest Learning Thermostat
- Best value: Honeywell Home T9
- Best budget pick: Amazon Smart Thermostat
Best overall
ecobee Smart Thermostat Premium
A remote room sensor in the box, built-in Alexa, and the best energy reporting make this the most complete smart thermostat for most homes.
- Room sensor included
- Built-in voice assistant
- Detailed energy savings reports
- Premium price
- Needs a C-wire
Best for simplicity
Google Nest Learning Thermostat
Learns your schedule on its own and looks fantastic doing it. The most hands-off option, especially for Google Home users.
- Auto-learns your routine
- Beautiful design
- Strong Google integration
- Sensors sold separately
- Fewer manual controls
Best value
Honeywell Home T9
Long-range room sensors and dual-assistant support at a mid-range price. Great for larger homes that need multi-room balancing on a budget.
- Affordable
- Long-range sensors
- Alexa & Google support
- Less polished app
- Plainer design
Best budget pick
Amazon Smart Thermostat
Made with Honeywell tech and controlled through Alexa, this is the cheapest way into a reliable smart thermostat — without learning features, but with solid scheduling and remote control.
- Lowest price
- Reliable Honeywell internals
- Easy Alexa control
- No room sensors
- Requires an Alexa device for full features
What to check before you buy
- C-wire: Most smart thermostats need a common wire for power. Check your existing wiring; many models include a power adapter if you don’t have one.
- HVAC compatibility: Confirm the thermostat supports your system (heat pump, multi-stage, etc.). Manufacturer compatibility checkers take 60 seconds.
- Room sensors: If some rooms are always too hot or cold, prioritize a model with sensors (ecobee or Honeywell T9).
Still deciding between the top three? Read our detailed ecobee vs Nest vs Honeywell comparison.
Confirm current prices on Amazon before buying.