Ecobee SmartSensor vs Nest Temperature Sensor (2nd gen)

The Ecobee SmartSensor is the better-rounded accessory, with a higher owner rating, a 3-year warranty, a five-year battery, occupancy detection and temperature alerts. The Nest Temperature Sensor (2nd gen) is more affordable but reads temperature only and has no alerts, and each pairs solely with its own thermostat brand.

The Ecobee SmartSensor adds occupancy detection and temperature alerts and works with Ecobee thermostats, while the Nest Temperature Sensor (2nd gen) is a temperature-only accessory that pairs exclusively with a compatible Nest Thermostat via Google Home.

The Ecobee SmartSensor is rated for around five years on a coin cell, versus about three years for the Nest Temperature Sensor (2nd gen), so the Ecobee needs fewer battery changes over time.

Ecobee thermostat owners who want occupancy-aware comfort balancing, temperature alerts, a long 3-year warranty and a five-year battery for low-maintenance operation across multiple rooms.

Nest Thermostat owners in supported regions who want a cheaper, simple way to prioritize a room that runs too hot or cold, and who do not need humidity, occupancy or alert features.