Ecobee Smart Thermostat Premium vs Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat

The Ecobee Smart Thermostat Premium is the stronger overall choice, leading on connectivity, integrations, sensors, alerts and included accessories, plus a built in speaker for on device voice control. The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat answers back with a system health monitor for filter and maintenance reminders.

Sensing and ecosystem reach. The Ecobee Smart Thermostat Premium ships with a remote temperature sensor and adds occupancy, air quality and CO2 sensing, plus support for Apple HomeKit, Samsung SmartThings, Home Assistant and IFTTT. The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat covers only temperature and humidity and works with just Google Home and Alexa.

Only the Ecobee Smart Thermostat Premium supports Apple HomeKit, alongside Google Home, Alexa, Samsung SmartThings, Home Assistant and IFTTT. The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat works with Google Home and Alexa only. Neither model supports Matter.

The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat does, sending filter and humidifier pad change reminders. The Ecobee Smart Thermostat Premium does not include this feature, though it offsets it with air quality alerts and a built in air quality monitor.

Buyers who want a straightforward, full color touchscreen thermostat with a long track record, HVAC maintenance reminders, and compatibility with Google Home and Alexa, and who do not need remote sensors or wider platform support.

Buyers who want a thermostat that senses more of the home, including occupancy, air quality and humidity, ships with a remote sensor, and connects to Apple HomeKit, SmartThings, Home Assistant and IFTTT in addition to Google Home and Alexa.