Best Smart-Thermostats: 6-Item Comparison Matrix
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Independent comparison · Compiled September 26, 2026
As an Amazon Associate, we earn from qualifying purchases. Ratings and review counts are sourced from Amazon Customer Reviews at the time of writing and may change. Product availability and details are subject to change — check the merchant page for current pricing.
We ranked these 6 picks by overall rating-weighted review strength. The shortlist draws on 129,814 verified Amazon customer reviews across the smart thermostats catalog. Estimated prices in this set run from roughly $56.99 to $139.99. Every product links straight to its merchant page — check live pricing and availability there before you buy.
Quick verdict
Sensi Smart Thermostat, Wi-Fi, DIY, Alexa, Energy Star Certified, ST55 leads this shortlist.
Lowest estimated price here: Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required (budget bracket).
| Rank | Product | Rating | Merchant |
|---|---|---|---|
| #1 | Sensi Smart Thermostat, Wi-Fi, DIY, Alexa, Energy Star Certified, ST55 Sensi · Mid-range | 4.4 ★ 23,053 reviews | Check Price → |
| #2 | Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray Honeywell · Mid-range | 4.3 ★ 20,097 reviews | Check Price → |
| #3 | Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow Google · Mid-range | 4.1 ★ 29,629 reviews | Check Price → |
| #4 | Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Charcoal Google · Mid-range | 4.1 ★ 29,629 reviews | Check Price → |
| #5 | Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required Amazon · Budget | 4.0 ★ 25,518 reviews | Check Price → |
| #6 | ecobee Smart Thermostat Essential - WiFi Thermostat, Energy Star Certified ecobee · Mid-range | 4.2 ★ 1,888 reviews | Check Price → |
The picks in detail
#1. Sensi Smart Thermostat, Wi-Fi, DIY, Alexa, Energy Star Certified, ST55
Why it's here: rank #1 overall, best rating in this set at 4.4★.
- Wi-Fi
- Alexa
- Energy Star Certified
#2. Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray
Why it's here: rank #2 overall.
- 7 Day Programmable
- Touch Screen
- Energy Star
- Alexa Ready
#3. Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow
Why it's here: rank #3 overall, largest verified review pool here (29,629 reviews).
#4. Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Charcoal
Why it's here: rank #4 overall, largest verified review pool here (29,629 reviews).
#5. Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required
Why it's here: rank #5 overall, lowest estimated price in this shortlist.
- Save money and energy
- Works with Alexa and Ring
- C-wire required
#6. ecobee Smart Thermostat Essential - WiFi Thermostat, Energy Star Certified
Why it's here: rank #6 overall.
- Energy Star Certified
More smart-thermostats guides
- Top Rated: Top 6
- Most Reviewed: Top 6
- Best Value: Top 6
- Budget Finds: Top 6
- Premium Picks: Top 6
- Community Favorites: Top 6
- Popular Picks: Top 6
- Mid-Range: Top 6
Every variant uses the same verified data pool, ranked for a different priority.
How we ranked these picks
Rankings are computed from Amazon Customer Reviews data only: each pick's star rating weighted by the logarithm of its review count. No sponsored placement, no free units, and no merchant paid for position; the order is data-only across 129,814 reviews. Ratings and counts are snapshots as of September 26, 2026 and change over time.