Nest Thermostat vs Sensi Touch 2 smart thermostat

The Nest Thermostat is the better overall value, with a lower price, occupancy and ambient-light sensing, temperature alerts and Apple HomeKit. The Sensi Touch 2 smart thermostat is the pick if you want a 4.3-inch color touchscreen, external sensor support and a 3-year warranty.

The Nest Thermostat leans on built-in intelligence (occupancy, motion and ambient-light sensing plus temperature alerts), while the Sensi Touch 2 smart thermostat leans on its touchscreen and expandable external temperature sensors. The Nest also adds Apple HomeKit, which the Sensi Touch 2 lacks.

The Sensi Touch 2 smart thermostat has a 4.3-inch color touchscreen, while the Nest Thermostat uses a color display controlled by a side touch strip rather than a full touchscreen. Both show temperature on-device.

Only the Nest Thermostat supports Apple HomeKit, alongside Google Home, Alexa, SmartThings and IFTTT. The Sensi Touch 2 smart thermostat works with Google Home, Alexa, SmartThings and Home Assistant, but not HomeKit.

Buyers who want a premium-looking glass touchscreen, dual-band Wi-Fi, the option to add external temperature sensors for multi-room balancing and a 3-year warranty, and do not need occupancy sensing or HomeKit.

Anyone wanting a lower-priced smart thermostat with occupancy and ambient-light sensing, temperature alerts and Apple HomeKit plus Google Home and Alexa, and who is fine with a shorter one-year warranty.