Ecobee Smart Thermostat Premium vs Nest Thermostat

The Ecobee Smart Thermostat Premium is the better overall thermostat, with a higher owner rating, a three-year warranty, far more sensors and alerts, and built-in voice and speaker. The Nest Thermostat's advantage is its lower price.

Capability versus cost. The Ecobee Smart Thermostat Premium adds TVOC/CO2 sensing, air-quality/fire/intrusion alerts, voice control, a speaker and a bundled sensor, while the Nest Thermostat is the more affordable, more basic option.

The Ecobee Smart Thermostat Premium. It adds occupancy, TVOC and CO2 sensing plus temperature, air-quality, fire and intrusion alerts. The Nest Thermostat offers occupancy and ambient-light sensing with only temperature alerts.

For app control, automatic away mode and energy savings on a Google or Apple home, yes. But the Nest Thermostat lacks the air-quality sensing, extra alerts, voice control and bundled sensor that the Ecobee Smart Thermostat Premium provides.

Buyers who want the most feature-complete unit: air-quality and CO2 sensing, a full alert suite, built-in voice and speaker, an included sensor and trim plate, and a three-year warranty.

Budget-focused buyers who want the cheaper unit for simple app control and energy savings in a Google or Apple home, and who do not need the Ecobee's extra sensors, alerts or voice control.