Side-by-side comparison based on expert reviews and community consensus.
Ecobee Smart Thermostat Premium
Best OverallHoneywell Home T9 Smart Thermostat
Best for Multi-Room ControlPrice
$200-$250
$150-$200
Summary
The most full-featured smart thermostat available, doubling as a voice assistant, air quality monitor, and home security device. Supports five smart home platforms — more than any competitor.
Comes with a remote room sensor in the box so you can monitor two areas of your home from day one. The best pick for larger homes where one thermostat can't tell the whole story.
Pros
- Supports 5 platforms: Alexa, Apple HomeKit, Google Assistant, IFTTT, and Samsung SmartThings
- Built-in mic and speaker for hands-free Alexa control without a separate smart speaker
- Monitors indoor air quality and can function as a home security device
- Compatible with remote sensors to balance temps across multiple rooms
- Remote room sensor included in the box — no extra purchase needed
- Supports up to 20 additional remote sensors for whole-home coverage
- Compatible with Alexa and Google Assistant
- Packed with features including smart scheduling and geofencing
Cons
- Most expensive option in the smart thermostat category
- Feature set may be overkill for users who just want basic temperature control
- Subscription required for some advanced features
- Bulkier design compared to Nest and Ecobee models
- App experience not as polished as Ecobee or Nest
- Additional sensors sold separately beyond the included one
Our take
If you want one device that does everything, this is it. The built-in Alexa speaker, air quality monitoring, and remote sensor support make every other thermostat feel half-baked.
If you've ever had a room that's always too hot or too cold, the T9 solves that problem out of the box — no extra purchases required. It's the most practical choice for multi-room households.
Buy
