Nest Learning Thermostat vs Honeywell Home T9 Smart Thermostat

Honeywell Home T9 Smart Thermostat on value and features per dollar: an included occupancy-detecting room sensor, system health monitoring, voice control with a speaker and Apple HomeKit. Nest Learning Thermostat wins on self-learning scheduling, dual-band Wi-Fi, Matter support and its colour display.

Honeywell Home T9 Smart Thermostat, alongside Alexa, Google Assistant and SmartThings. Nest Learning Thermostat has no HomeKit support, covering Google Home, Alexa, SmartThings, IFTTT and Matter, with Home Assistant only partially supported.

Honeywell Home T9 Smart Thermostat includes a Smart Room Sensor with up to 200 ft range that detects occupancy and reads humidity, and you can prioritise rooms or average them. Nest Learning Thermostat supports remote sensors too, but selects them by time of day rather than by occupancy.

Nest Learning Thermostat, which builds a schedule from your behaviour and adjusts around your routine automatically. Honeywell Home T9 Smart Thermostat uses manual scheduling with geofenced Auto Home and Away, so it reacts to your location rather than learning your habits.

Only Nest Learning Thermostat, which lists Matter alongside Google Home, Alexa, SmartThings and IFTTT. Honeywell Home T9 Smart Thermostat has no Matter support, although its native HomeKit, Google, Alexa and SmartThings coverage means most homes will not miss it.

Google-centric households that want a thermostat to work out its own schedule, with a colour display, several finishes, dual-band Wi-Fi and Matter. If you want a room sensor in the box, occupancy-driven heating, HomeKit and HVAC reminders for less, Honeywell Home T9 Smart Thermostat is the better buy.