Ecobee Smart Thermostat Premium vs Sensi Lite smart thermostat

The Ecobee Smart Thermostat Premium is far more capable, with a higher owner rating, a color touchscreen, dual-band Wi-Fi, air-quality sensing, a full alert suite and a built-in speaker. The Sensi Lite smart thermostat's edge is its much lower price.

One is a flagship, one is an entry model. The Ecobee Smart Thermostat Premium adds TVOC/CO2 sensing, air-quality/fire/intrusion alerts, a speaker and a bundled sensor, while the Sensi Lite smart thermostat is a simple, low-cost monochrome unit.

The Ecobee Smart Thermostat Premium, by a wide margin. It adds occupancy, humidity, TVOC and CO2 sensing plus temperature, air-quality, fire and intrusion alerts. The Sensi Lite smart thermostat has just a temperature sensor and no built-in alerts.

Yes, if budget is the deciding factor. The Sensi Lite smart thermostat is the more affordable option and installs easily via guided DIY setup, but it gives up the touchscreen, extra sensors, alerts and dual-band Wi-Fi the Ecobee Smart Thermostat Premium offers.

Buyers who want the most complete thermostat here: air-quality and CO2 sensing, a full alert suite, built-in voice and speaker, an included sensor and trim plate, dual-band Wi-Fi and a three-year warranty.

Budget-focused DIY installers who want the cheapest way to add Wi-Fi control and scheduling to a basic system, and who do not need a touchscreen, extra sensors or advanced alerts.