Best Smart-Thermostats — Budget Finds: Top 6 Compared
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Independent comparison · Compiled September 26, 2026
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We ranked these 6 picks by lowest price points in our catalog. 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
Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required 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 | Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required Amazon · Budget | 4.0 ★ 25,518 reviews | Check Price → |
| #2 | Sensi Smart Thermostat, Wi-Fi, DIY, Alexa, Energy Star Certified, ST55 Sensi · Mid-range | 4.4 ★ 23,053 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 | 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 → |
| #5 | Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Charcoal Google · Mid-range | 4.1 ★ 29,629 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. Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required
Why it's here: rank #1 overall, lowest estimated price in this shortlist.
- Save money and energy
- Works with Alexa and Ring
- C-wire required
#2. Sensi Smart Thermostat, Wi-Fi, DIY, Alexa, Energy Star Certified, ST55
Why it's here: rank #2 overall, best rating in this set at 4.4★.
- Wi-Fi
- Alexa
- Energy Star Certified
#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. 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 #4 overall.
- 7 Day Programmable
- Touch Screen
- Energy Star
- Alexa Ready
#5. Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Charcoal
Why it's here: rank #5 overall, largest verified review pool here (29,629 reviews).
#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
- Premium Picks: Top 6
- Community Favorites: Top 6
- Popular Picks: Top 6
- Mid-Range: Top 6
- Under $100: 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.