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A smart thermostat is one of the few tech purchases that literally pays for itself. The EPA estimates smart thermostats can save up to 8% on heating and cooling bills — which adds up to $50-$150/year depending on your home and climate. Over a 5-year period, a $200 thermostat is essentially free.
Best Overall
Google Nest Learning Thermostat (4th Gen)
Our top-rated pick — skip to the full review below or check it on Amazon now.
We tested 10 smart thermostats for ease of installation, scheduling intelligence, energy savings, and smart home integration.
Quick Picks
2 TOP CHOICES
Google Nest Learning Thermostat (4th Gen)
Best smart thermostat that programs itself and learns your schedule
Learning: Auto-schedule based on your patterns
Display: 3.4" mirror display with ambient sensor
The 4th-gen Nest Learning Thermostat is a significant upgrade over its predecessor with a premium mirror finish display and more accurate learning algorithms.
Check Today's Price
Amazon Smart Thermostat
Best dirt-cheap smart thermostat for Alexa users
Integration: Alexa built-in, Works with Google
Energy Savings: Hunker Down Mode + scheduling
Amazon's Smart Thermostat launched at a remarkable price point and frequently goes on sale even lower.
Check Today's PriceOur Testing Methodology
Each thermostat was installed in the same HVAC system and monitored for 4 weeks during heating and cooling seasons. Energy usage was compared against a baseline smart schedule. App quality was evaluated across 30 interactions per device. Installation difficulty was rated by both an HVAC professional and a DIY homeowner.
Comparison Table
10 PRODUCTS COMPARED
← Scroll to compare →
| Product | Best For | Key Spec | Score | |
|---|---|---|---|---|
| Best Overall | Auto-schedule based on your patterns | 9.5/10 | View on Amazon | |
| Best for Multi-Room | 1 SmartSensor included | 9.5/10 | View on Amazon | |
| Best Value Smart | Manual or Eco Temperature auto-mode | 9/10 | View on Amazon | |
| Best Budget | Alexa built-in, Works with Google | 8.3/10 | View on Amazon | |
| Best for Zoning | Up to 20 wireless Smart Room Sensors | 9/10 | View on Amazon | |
| Best for HVAC Compatibility | Works with most 24V HVAC systems | 8.8/10 | View on Amazon | |
| Best Budget Touchscreen | 3.3" color touchscreen | 8.5/10 | View on Amazon | |
| Best Design | Transparent OLED — see through the device | 7.8/10 | View on Amazon | |
| Best for Electric Baseboard | 120V/240V electric baseboards and fan coils | 9/10 | View on Amazon | |
| Best for Commercial HVAC | 24V heating and cooling systems | 8.5/10 | View on Amazon |
Quick Summary
| # | Product | Best For | Score | |
|---|---|---|---|---|
| 1 | Google Nest Learning Thermostat (4th Gen) | Best Overall | 9.5/10 | Check Price → |
| 2 | Ecobee SmartThermostat Premium | Best for Multi-Room | 9.5/10 | Check Price → |
| 3 | Google Nest Thermostat | Best Value Smart | 9/10 | Check Price → |
| 4 | Amazon Smart Thermostat | Best Budget | 8.3/10 | Check Price → |
| 5 | Honeywell Home T9 Smart Thermostat | Best for Zoning | 9/10 | Check Price → |
Smart Thermostats Reviews
10 PRODUCTS REVIEWED
Google Nest Learning Thermostat (4th Gen)
Best for: Best smart thermostat that programs itself and learns your schedule
Rated 9.5/10 by our testing team
The 4th-gen Nest Learning Thermostat is a significant upgrade over its predecessor with a premium mirror finish display and more accurate learning algorithms. It observes your temperature adjustments for the first week and automatically creates a schedule — zero programming required. Home/Away Assist uses your phone's location to detect when you leave and adjusts temperature automatically.
After one week, it knew our schedule better than we did. We haven't manually adjusted it in 3 months.
Why we like it
- Programs itself in 1 week — zero scheduling needed
- Elegant mirror display looks beautiful on any wall
- Home/Away Assist saves energy automatically
- Works with Google Home, Alexa, and HomeKit
Flaws
- Most expensive thermostat in the lineup
- Requires Google or Apple account
- C-wire or adapter may be required
Prices checked Jun 28, 2026
Ecobee SmartThermostat Premium
Best for: Best smart thermostat for homes with hot/cold spots in multiple rooms
Rated 9.5/10 by our testing team
Ecobee's killer feature is SmartSensors — small wireless sensors placed in bedrooms or living areas that feed temperature and occupancy data to the thermostat. Instead of conditioning air based on the hallway temperature, it averages across all sensors. The included sensor plus the option to add more makes it the best choice for multi-story homes or rooms that are chronically too hot or cold.
Why we like it
- SmartSensor addresses hot/cold room problems
- Built-in Alexa for voice control
- Air quality monitoring (VOC, humidity)
- Works with all major smart home platforms
Flaws
- Premium price vs Nest Thermostat
- SmartSensors sold separately beyond included one
- Thicker profile than Nest
Prices checked Jun 28, 2026
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Google Nest Thermostat
Best for: Best affordable smart thermostat for Google Home users
Rated 9/10 by our testing team
The standard Nest Thermostat drops the auto-learning for a lower price, but it still delivers Eco Temperature mode (automatically switches to energy-saving temps when you're away), clean scheduling, and beautiful design. It regularly goes on sale under $80 and can be installed in under 30 minutes without an electrician. The best starting point for smart thermostat beginners.
Why we like it
- Clean, attractive design at affordable price
- Eco Temperature saves energy automatically
- Easy DIY installation — no C-wire in most homes
- Google Home integration is excellent
Flaws
- No auto-learning schedule (Nest Learning's advantage)
- Swipe interface less intuitive than touchscreen
- Limited compatibility with some HVAC systems
Prices checked Jun 28, 2026
Amazon Smart Thermostat
Best for: Best dirt-cheap smart thermostat for Alexa users
Amazon's Smart Thermostat launched at a remarkable price point and frequently goes on sale even lower. It's a sensible choice if you're in the Amazon/Alexa ecosystem — Alexa voice control works reliably, scheduling is straightforward, and it qualifies for utility rebates in most states. It's not sophisticated, but for a second home, rental property, or basic smart home upgrade, it delivers.
Why we like it
- Best price of any smart thermostat
- Alexa integration is seamless
- Qualifies for utility company rebates
- Simple, accessible interface
Flaws
- Basic compared to Nest or Ecobee
- No learning capabilities
- Limited smart home integration beyond Alexa
Prices checked Jun 28, 2026
Honeywell Home T9 Smart Thermostat
Best for: Best smart thermostat for homes with multiple zones or remote sensors
Rated 9/10 by our testing team
The T9 is Honeywell's best-ever smart thermostat and a strong alternative to Ecobee for multi-room control. Resideo's Smart Room Sensors are well-priced and reliable, and the Focus feature lets you prioritize specific rooms at different times of day — bedroom at night, living room during the day. Works with all major platforms including HomeKit.
Why we like it
- Up to 20 room sensors for precise zoning
- Full smart home platform compatibility
- Focus Mode prioritizes room comfort
- Maintenance reminders for filter changes
Flaws
- Room sensors sold separately
- App less polished than Nest/Ecobee
- Thicker than competitors
Prices checked Jun 28, 2026
Emerson Sensi Touch 2
Best for: Best smart thermostat for complex HVAC systems and pro installation
Emerson Sensi is the choice when your HVAC system doesn't play nice with Nest or Ecobee. The Sensi Touch 2 has the broadest compatibility matrix in the industry, supporting complex systems like multi-stage heat/cool, dual fuel, and older HVAC configurations. It's also ENERGY STAR certified. HVAC professionals frequently recommend it for challenging installations.
Why we like it
- Broadest HVAC compatibility of any smart thermostat
- ENERGY STAR certified
- Works with all major voice assistants
- Clean 4" touchscreen interface
Flaws
- Simpler features than Nest or Ecobee
- Learning capabilities are basic
- Less visually striking than Nest
Prices checked Jun 28, 2026
Wyze Thermostat
Best for: Best ultra-budget smart thermostat for DIY installers
Wyze built a 3.3" color touchscreen smart thermostat for under $60 — a feat that seemed impossible. It covers the basics: scheduling, geofencing for automatic away mode, energy history, and works with Alexa and Google Home. The Wyze app guides you through installation step-by-step with your wiring configuration. For renters, starter homes, or secondary properties, it's excellent value.
Why we like it
- Touchscreen display at budget price
- Guided installation in app is excellent
- Geofencing for automatic away mode
- Wyze ecosystem integration
Flaws
- Basic AI vs Nest or Ecobee
- Wyze app less polished than Nest
- No Apple HomeKit support
Prices checked Jun 28, 2026
Johnson Controls GLAS
Best for: Most stunning-looking smart thermostat for design-conscious homeowners
The GLAS is the most beautiful thermostat ever made — a transparent OLED display that floats on your wall like a piece of modern art. It also measures indoor air quality including VOCs and CO2. While the software is dated and Cortana integration limited, it still functions reliably as a smart thermostat. For homeowners where the wall is a design statement, nothing comes close.
Why we like it
- Most beautiful thermostat design ever made
- Transparent OLED is truly stunning
- Indoor air quality monitoring
- Genuinely unique aesthetic
Flaws
- Cortana assistant is outdated
- Software updates are infrequent
- Limited smart home compatibility vs competitors
Prices checked Jun 28, 2026
Mysa Smart Thermostat for Electric Baseboard
Best for: Best smart thermostat for homes with electric baseboard heating systems
Rated 9/10 by our testing team
Electric baseboard and in-floor heating systems don't work with standard smart thermostats — they use 120V/240V instead of 24V. Mysa fills this gap brilliantly with a polished thermostat that supports all major smart home platforms. If you have electric baseboard heating, Mysa is your only premium option and it's excellent.
Why we like it
- Only premium option for electric baseboard heating
- Full HomeKit, Alexa, Google Home support
- Polished app with energy reports
- Easy DIY installation with illustrated guide
Flaws
- Only useful for electric baseboard/fan coil systems
- More expensive than 24V alternatives
- Smaller ecosystem than Nest/Ecobee
Prices checked Jun 28, 2026
Bosch BCC100 Connected Thermostat
Best for: Best smart thermostat for homes with Bosch HVAC or commercial heating systems
Bosch brings German engineering reliability to the thermostat category. The BCC100 is particularly well-suited for homes with Bosch HVAC systems, offering deeper integration and diagnostic access. The build quality is exceptional — this is a thermostat built to last decades. Basic smart features cover scheduling and remote access reliably without the AI complexity of Nest.
Why we like it
- Exceptional German build quality and reliability
- Deep Bosch HVAC system integration
- Straightforward controls and reliability
- Maintenance alerts and diagnostics
Flaws
- Basic AI features vs Nest/Ecobee
- App is functional but not polished
- Limited smart home integration options
Prices checked Jun 28, 2026
The Bottom Line
The Google Nest Learning Thermostat (4th Gen) is the best for most people — it programs itself and integrates beautifully with Google Home. Ecobee SmartThermostat Premium is the best for multi-room homes with its included smart sensor. Budget buyers should start with the Google Nest Thermostat or Amazon Smart Thermostat.
Best Overall
Google Nest Learning Thermostat (4th Gen)
Our #1 recommendation — the best overall pick in this guide.
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BUYING GUIDE
Will a Smart Thermostat Work With Your HVAC System?
Before buying any smart thermostat, check if you have a C-wire (common wire) at your thermostat location. The Nest Learning Thermostat, Ecobee, and most smart thermostats need a C-wire for consistent power. Without it, they use a technique called power stealing that sometimes causes HVAC issues.
Nest includes a Nest Power Connector adapter for no-C-wire installations. Ecobee includes a Power Extender Kit. When in doubt, hire an HVAC tech for installation — most charge $50-100.
Best Overall
Google Nest Learning Thermostat (4th Gen)
A great example of this in practice — check current price on Amazon.
Smart Thermostat Energy Savings: What's Realistic?
The EPA estimates smart thermostats save $50-$150/year. Your actual savings depend on: - Current heating/cooling habits (do you already adjust manually?) - Climate and local energy rates - Home insulation quality - How well you use the features
The biggest savings come from Away mode (auto-setback when you leave) and consistent scheduling. Homes where occupants forget to adjust manually see the highest savings.
FAQ
COMMON QUESTIONS
Head-to-Head Comparisons
COMPARE TOP PICKS SIDE BY SIDE
Google Nest Learning Thermostat (4th Gen) vs Ecobee SmartThermostat Premium
9.5/10 vs 9.5/10 — Close call
Google Nest Learning Thermostat (4th Gen) vs Google Nest Thermostat
9.5/10 vs 9/10 — Clear winner
Ecobee SmartThermostat Premium vs Google Nest Thermostat
9.5/10 vs 9/10 — Clear winner
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