Thermostats · Head to head

Amazon Smart Thermostat vs Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat

Full Smart Thermostats comparison in 2026

Updated September 2026
Data from Amazon and official Honeywell Home site.
2026 verdict
Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat
Winner
Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat
$120.00$179.9933% OFF
Buy on Amazon USA
The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat has been sold since 2015, and even against a much newer rival, the Amazon Smart Thermostat, it remains the smart thermostat with more sensors, more integrations and more alerts, adding humidity sensing, Google Home support and a system health monitor that the Amazon Smart Thermostat does not have. The Amazon Smart Thermostat answers back with an included trim plate to hide marks from an old thermostat, something the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat skips, and it keeps things simple with Alexa only control. Both connect over 2.4GHz Wi-Fi only, carry a similar one year warranty, and include a basic display for reading the current temperature. Pick the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat if you want broader ecosystem support, humidity sensing and HVAC health alerts, and pick the Amazon Smart Thermostat if you are firmly in the Alexa ecosystem and want the simplest possible setup with a trim plate included.
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FeatureAmazon Smart ThermostatHoneywell Home RTH9585WF Wi-Fi Smart Color ThermostatWinner
Price$118.27$120.00Amazon Smart Thermostat
Rating4.24.3Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat
Included accessoriesTrim PlateNoneAmazon Smart Thermostat
IntegrationsAlexaGoogle Home, Alexa, Samsung SmartThings, Home AssistantHoneywell Home RTH9585WF Wi-Fi Smart Color Thermostat
SensorsTemperatureTemperature, HumidityHoneywell Home RTH9585WF Wi-Fi Smart Color Thermostat
AlertsNoneTemperature AlertsHoneywell Home RTH9585WF Wi-Fi Smart Color Thermostat
System Health MonitorNOYESHoneywell Home RTH9585WF Wi-Fi Smart Color Thermostat
Voice ControlNOYESHoneywell Home RTH9585WF Wi-Fi Smart Color Thermostat
Warranty1 year1 yearTie
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
ScreenYESYESTie
Energy SavingsYESYESTie

Frequently Asked Questions

Which is better overall: Amazon Smart Thermostat or Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?

The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat is the stronger overall pick, with broader platform integrations, humidity sensing, temperature alerts and a system health monitor. The Amazon Smart Thermostat wins only on included accessories, since it ships with a trim plate the Honeywell does not include.

What is the biggest difference between the Amazon Smart Thermostat and the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?

Ecosystem reach. The Amazon Smart Thermostat works only with Alexa, while the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat adds Google Home and a Home Assistant integration, plus humidity sensing and temperature alerts the Amazon Smart Thermostat does not have.

Does the Amazon Smart Thermostat work with Google Home?

No. The Amazon Smart Thermostat supports Alexa only. The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat works with both Google Home and Alexa, plus a Home Assistant integration.

Which one measures humidity?

The Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat measures both temperature and humidity. The Amazon Smart Thermostat measures temperature only.

Who should buy the Amazon Smart Thermostat?

Buyers fully committed to Alexa who want the simplest possible smart thermostat setup, with a trim plate included and no interest in Google Home, humidity sensing or HVAC health alerts.

Who should buy the Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?

Buyers who want humidity sensing, temperature alerts, a system health monitor for HVAC maintenance, and compatibility with both Google Home and Alexa rather than Alexa alone.

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