Amazon Smart Thermostat vs Honeywell Home T9 Smart Thermostat

Honeywell Home T9 Smart Thermostat, by a wide margin: an included Smart Room Sensor with occupancy detection, humidity sensing, Apple HomeKit, Google and SmartThings support, voice control, alerts and maintenance reminders. Amazon Smart Thermostat wins only on price.

The sensor included with Honeywell Home T9 Smart Thermostat reports temperature and humidity from up to 200 ft away and detects whether a room is occupied, so you can prioritise a bedroom or let the system follow people. Amazon Smart Thermostat does not support external sensors at all.

Honeywell Home T9 Smart Thermostat covers Alexa, Google Assistant, Apple HomeKit and SmartThings, and has a built-in speaker with voice control. Amazon Smart Thermostat works with Alexa only, with no Google Home, HomeKit, SmartThings, Home Assistant, IFTTT or Matter.

Honeywell Home T9 Smart Thermostat measures temperature and humidity, both at the thermostat and at each Smart Room Sensor. Amazon Smart Thermostat measures temperature only, with no humidity, occupancy or proximity sensing and no alerts of any kind.

Both address the C wire. Amazon Smart Thermostat includes a C-wire adapter and a trim plate. Honeywell Home T9 Smart Thermostat also includes a C wire power adapter and often fits the existing wall plate when replacing an older Honeywell unit.

Alexa households looking for the cheapest smart thermostat that holds a schedule and can be adjusted remotely, in a home where every room heats evenly. If any room runs hot or cold, or you use Google or Apple, Honeywell Home T9 Smart Thermostat is the right choice.