The best smart thermostats, measured
We compared 6 current thermostats on Matter support, humidity control, and measured temperature accuracy. No unit was provided by a manufacturer; rankings reflect installation fit, not commission.
| Rank▲ | Thermostat▲ | HS Score▲ | Matter▲ | Humidity▲ | Accuracy▲ | Price▲ |
|---|
Ecobee Smart Thermostat Premium
The only unit in our group with a built-in humidity sensor and a Thread radio, which is exactly the combination vacation mode needs. Measured temperature accuracy held within ±0.4°F across a two-week log, and the alert thresholds are granular enough to be useful rather than noisy.
- Native humidity control
- Matter + Thread, future-proof
- Built-in air quality sensor
- Premium price
- Setup wizard is fiddly
Amazon Smart Thermostat
If you live in a dry climate and don't need humidity control, this is the rational pick. It lacks a humidity sensor and a Thread radio, but its measured accuracy was a respectable ±0.6°F, and at this price the value is hard to argue with.
- Lowest price in test
- Simple Alexa setup
- Solid accuracy
- No humidity sensor
- Wi-Fi only, no Thread
Tado° Smart Thermostat X
The strongest choice for an Apple-first household. Thread-native, with a clean HomeKit experience and excellent open-window detection. The companion app pushes a subscription harder than we'd like, which costs it a point.
- Thread-native, fast
- Great HomeKit support
- Open-window detection
- Pushes a subscription
- Pricey accessories
How we test thermostats
Every unit is installed on the same HVAC bench and logged for two weeks against a calibrated reference sensor. We cross-check our readings with RTINGS measurements and manufacturer specs, and we track street price for 120 days before publishing.
Days logged per unit against a calibrated reference
Days of price tracking before a verdict
Primary sources cross-checked per claim
Manufacturer-provided review units