Ecobee vs Nest vs Honeywell: Which Smart Thermostat Wins?
A head-to-head comparison of the three top smart thermostats — ecobee, Google Nest, and Honeywell Home — to help you pick the right one and save on energy.
The three biggest names in smart thermostats — ecobee, Google Nest, and Honeywell Home — all promise lower energy bills and effortless control. But they take very different approaches. Here’s how they actually compare, and which one is right for your home.
Quick verdict
- Best overall: ecobee — its included remote room sensor solves the “one room is always too hot/cold” problem better than anyone.
- Best design & simplicity: Google Nest — the slickest interface and auto-scheduling, ideal if you want it to “just work.”
- Best value: Honeywell Home T9 — strong features and room sensors for less money.
Side-by-side
| Feature | ecobee | Google Nest | Honeywell Home T9 |
|---|---|---|---|
| Remote room sensors | ✅ Included | ⚠️ Sold separately | ✅ Supported |
| Auto-scheduling | ✅ | ✅ (learns) | ✅ |
| Voice assistant | Alexa built-in | Google Assistant | Works with both |
| Geofencing | ✅ | ✅ | ✅ |
| Design | Modern touchscreen | Premium dial | Functional |
| Best for | Uneven temps | Simplicity | Budget |
ecobee — best overall
ecobee’s standout feature is the SmartSensor in the box. It measures temperature and occupancy in another room, so your thermostat can prioritize the rooms you’re actually using instead of just the hallway where the thermostat lives. If you have a bedroom that’s always too warm or an office that’s always too cold, this is the fix.
ecobee Smart Thermostat Premium
Includes a remote SmartSensor, built-in Alexa, and an air-quality monitor. The most complete package for homes with uneven temperatures.
- Remote room sensor included
- Built-in Alexa speaker
- Air quality monitoring
- Excellent energy reports
- Pricier than basic models
- Speaker is a nice-to-have, not essential
Google Nest — best for simplicity
The Nest Learning Thermostat earns its name: it watches how you adjust the temperature for a week or two, then builds a schedule automatically. The dial interface is the nicest-looking on the market, and if you’re in the Google ecosystem it integrates seamlessly.
Google Nest Learning Thermostat
Auto-learns your schedule, looks gorgeous on the wall, and integrates tightly with Google Home. The most hands-off option.
- Learns your schedule automatically
- Best-looking interface
- Great Google Home integration
- Room sensors cost extra
- Fewer manual scheduling options
Honeywell Home T9 — best value
Honeywell’s T9 supports smart room sensors with a longer range than most, costs less than the flagships, and works with both Alexa and Google Assistant. It’s the pragmatic pick if you want sensor-based comfort without paying premium prices.
Honeywell Home T9 Smart Thermostat
Long-range smart room sensors and broad compatibility at a friendlier price. A smart buy for larger homes on a budget.
- Affordable
- Long-range room sensors
- Works with Alexa & Google
- Interface less polished
- App occasionally clunky
How to choose
- One room always uncomfortable? → ecobee (sensor included)
- Want it to run itself with zero fuss? → Nest
- Multiple rooms but watching budget? → Honeywell T9
- Deep in Google or Amazon’s ecosystem? → match the assistant you already use
Before you buy, double-check HVAC compatibility — most of these need a “C-wire” (common wire) for power, though kits are available if you don’t have one. See our best smart thermostats guide for more picks.
Prices change frequently — confirm current pricing on Amazon.