Updated September 2026
Data from Amazon and official Honeywell Home site.
2026 verdict
Honeywell Home X8S Smart Thermostat wins the 2026 matchup against Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, mainly on warranty, included accessories, and connectivity.
The comparison tilts its way because of warranty, included accessories, and connectivity, with integrations and sensors keeping it in front. Choose Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat only if price and rating matter more to you than the broader advantage from Honeywell Home X8S Smart Thermostat. For most setups, Honeywell Home X8S Smart Thermostat is the smarter buy.
Price alerts
Thermostat prices change while you decide
We check the price of every Thermostat in the catalog daily and email you the drops, whichever one you pick.
No spam. Unsubscribe in one click.
| Feature | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat | Honeywell Home X8S Smart Thermostat | Winner |
|---|---|---|---|
| Price | $123.49 | $259.99 | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat |
| Rating | 4.3 | 4.1 | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat |
| Warranty | 1 year | 2 years | Honeywell Home X8S Smart Thermostat |
| Included accessories | None | Temperature Sensor | Honeywell Home X8S Smart Thermostat |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi, 5 GHz WiFi | Honeywell Home X8S Smart Thermostat |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter, External Temperature Sensors | Honeywell Home X8S Smart Thermostat |
| Sensors | Temperature, Humidity | Proximity / Motion, Occupancy, Temperature, Humidity | Honeywell Home X8S Smart Thermostat |
| Alerts | Temperature Alerts | Air Quality Alerts | Honeywell Home X8S Smart Thermostat |
| Speaker | NO | YES | Honeywell Home X8S Smart Thermostat |
| Screen | YES | YES | Tie |
| Energy Savings | YES | YES | Tie |
| System Health Monitor | YES | YES | Tie |
31% OFF
$123.49
$179.99
- + Price: $123.49
- + Rating: 4.3
- - Warranty: 1 year vs 2 years
- - Included accessories: None vs Temperature Sensor
Winner
$259.99
- + Warranty: 2 years
- + Included accessories: Temperature Sensor
- + Connectivity: 2.4 GHz WiFi, 5 GHz WiFi
- - Price: $259.99 vs $123.49
- - Rating: 4.1 vs 4.3
Price history compared
Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.
- Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat
- Honeywell Home X8S Smart Thermostat
Loading price history...
Frequently Asked Questions
Which is better overall: Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat or Honeywell Home X8S Smart Thermostat?
Honeywell Home X8S Smart Thermostat has the stronger overall profile in this comparison, especially for warranty, included accessories, and connectivity.
What is the biggest difference between Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat and Honeywell Home X8S Smart Thermostat?
Price is one of the clearest differences: Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat lists $123.49, while Honeywell Home X8S Smart Thermostat lists $259.99.
Which one looks better on price?
Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat is listed at $123.49, while Honeywell Home X8S Smart Thermostat is listed at $259.99. Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat (better spec).
Who should buy Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat?
Choose Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat if your priority is price and rating and that matters more than warranty.
Who should buy Honeywell Home X8S Smart Thermostat?
Choose Honeywell Home X8S Smart Thermostat if your priority is warranty and included accessories and that matters more than price.
Full comparison table
Compare all 22 Thermostats side by side
You are looking at two of them. The full table lines up all Thermostats in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 22 Thermostats
- 51 specs compared
- 47 filters
CieloBreez Max
$114.35
SensiTouch smart thermostat
11% OFF$179.99$159.99
EcobeeSmart Thermostat Premium
27% OFF$204.97$149.63
SensiSmart thermostat
38% OFF$129.99$79.99
EcobeeSmart Thermostat Enhanced
10% OFF$199.99$179.99
GoogleNest Learning Thermostat (4th gen)
14% OFF$279.99$239.99
CieloBreez Eco
$79.00- Honeywell Home
RTH9585WF Wi-Fi Smart Color Thermostat
31% OFF$179.99$123.49 
Honeywell HomeT9 Smart Thermostat
$209.99
Honeywell HomeT5 Smart Thermostat
30% OFF$109.99$77.25
SensiTouch 2 smart thermostat
$189.52
AmazonSmart Thermostat
21% OFF$119.98$94.23
Honeywell HomeX7S Smart Thermostat
7% OFF$199.99$185.00
EcobeeSmart Thermostat Essential
$139.00
Honeywell HomeX2S Smart Thermostat
26% OFF$84.99$62.99
GoogleNest Learning Thermostat
AqaraThermostat Hub W200
$159.99
GoogleNest Thermostat
10% OFF$129.99$117.45
Honeywell HomeX8S Smart Thermostat
$259.99
SensiLite smart thermostat
$64.00
- ThermostatsHoneywell Home
RTH9585WF Wi-Fi Smart Color Thermostat
4.3(20,087)31% OFF$179.99$123.49 - ThermostatsHoneywell Home
T5 Smart Thermostat
4.3(1,504)30% OFF$109.99$77.25 - ThermostatsHoneywell Home
T9 Smart Thermostat
4.3(2,976)$209.99 - ThermostatsHoneywell Home
X2S Smart Thermostat
4.2(413)26% OFF$84.99$62.99 - ThermostatsHoneywell Home
X7S Smart Thermostat
4.3(82)7% OFF$199.99$185.00 - ThermostatsHoneywell Home
X8S Smart Thermostat
4.1(150)$259.99 
Water Leak SensorsHoneywell HomeL1 WiFi Water Leak and Freeze Detector
3.7(66)8% OFF$67.64$62.23