Comparing popular models side by side, smart thermostat reviews help you spot the differences that matter. Occupancy sensing, Matter support, app control and voice control vary widely across brands. Use compatibility, scheduling and control as your shortlist, not the longest feature list.
Owner feedback, together with manufacturer specifications, guided our selection. Readers comparing models can turn to our best smart thermostat and best rated smart thermostat guides. Our Editorial Policy covers how we compared these popular models. Turn off power at the breaker before removing an old thermostat. Thick 120V or 240V wires mean line-voltage heat, so call a licensed electrician.
Top 3 Smart Thermostats in These Reviews
ecobee Smart Thermostat Enhanced
- Occupancy sensing built in
- Preheat or precool before you arrive
- Schedule learning, with humidity adjustment
Google Nest Learning Thermostat (4th Gen) with Sensor
- Screen you can read from across the room
- Learns from outdoor weather to adjust indoors
- Most 24V systems are supported
Honeywell Home X2S Smart Wi-Fi Thermostat
- Matter support, with Alexa, Google Assistant and Apple Home
- Flexible schedule options: 7-day, 5-1-1, 5-2 or non-programmable
- Humidity display, with auto-away and filter reminders
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Reviewed Models Side by Side
| # | Product | Key Features | |
|---|---|---|---|
| 1 |  ecobee Smart Thermostat Enhanced |
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| 2 |  Google Nest Learning Thermostat (4th Gen) with Sensor |
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| 3 |  Honeywell Home X2S Smart Wi-Fi Thermostat |
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| 4 |  Sensi Touch 2 Smart Thermostat (ST76) |
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| 5 |  Bosch Connected Control BCC110 Thermostat |
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| 6 |  Mysa Smart Thermostat for Heating and Cooling |
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1. ecobee Smart Thermostat Enhanced
Best Overall
- Occupancy sensing built in
- Preheat or precool before you arrive
- Schedule learning, with humidity adjustment
- Power Extender Kit plus trim kit in the box
- Ecobee app is required for remote control
- Where no C wire exists, the Power Extender Kit is needed
- Power: Power Extender Kit included
- Install: Trim kit included
- App: ecobee app
Occupancy sensing built in makes arrival comfort a clear strength.
Daily schedules benefit from preference learning and humidity adjustment together.
Who should buy the ecobee Enhanced
Choose this for occupancy sensing and preheating before arrival.
Who should look past the ecobee Enhanced
Skip it if a separate room sensor is the priority.
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2. Google Nest Learning Thermostat (4th Gen) with Sensor
Best Learning Pick
- Screen you can read from across the room
- Learns from outdoor weather to adjust indoors
- Most 24V systems are supported
- Included sensor for a chosen room
- Some homes may still need a C wire
- You must approve schedule changes
- Systems: Most 24V, incl. heat pump and radiant
- Platforms: Google Home, Matter
- Voice: Alexa, Siri, Google Assistant
A larger display, with brightness that adjusts itself, is easy to read across a room.
Outdoor temperature guides the sensor target for one chosen room.
Who should buy the Nest Learning Thermostat
A good match for learning control and a chosen-room target.
Who should look past the Nest Learning Thermostat
Look elsewhere if you prefer schedule changes without permission.
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3. Honeywell Home X2S Smart Wi-Fi Thermostat
Best Schedule Pick
- Matter support, with Alexa, Google Assistant and Apple Home
- Flexible schedule options: 7-day, 5-1-1, 5-2 or non-programmable
- Humidity display, with auto-away and filter reminders
- Setpoint floor of 32°F for low heat
- You need a C wire to install it
- Electric baseboard heat is not a fit
- Systems: Up to 2 heat/2 cool
- Power: C wire required
- App: First Alert
Flexible scheduling stands out for varied weekly routines.
Control, presence and humidity display come together with Matter support and auto-away.
Who should buy the Honeywell X2S
Suits homes that need flexible schedules and Matter support.
Who should look past the Honeywell X2S
Avoid it if electric baseboard heat is your system.
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4. Sensi Touch 2 Smart Thermostat (ST76)
Best Touchscreen Pick
- Touchscreen control for direct adjustments on the wall
- Room sensor balancing, with Sensi Room Sensors (sold separately)
- Bluetooth-guided installation through the app
- Usage reports with equipment alerts and filter reminders
- C wire is required for installation
- Sensi Room Sensors are sold separately
- Power: C wire required
- Reports: Usage and equipment alerts
- Voice: Alexa
Touchscreen control makes direct, on-wall adjustments simple.
Installation guidance over Bluetooth pairs with Room Sensors, sold separately, for even room temperatures.
Who should buy the Sensi Touch 2
Pick this for touchscreen control and room-sensor balancing.
Who should look past the Sensi Touch 2
Choose another option if no C wire is available.
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5. Bosch Connected Control BCC110 Thermostat
Best Offline Pick
- Full-color touchscreen at 5 inches
- Still runs your schedule without Wi-Fi
- Heat pump systems at 4 heat/2 cool and conventional systems at 2 heat/2 cool
- Humidifier or dehumidifier control, with dual fuel
- C wire must be present
- Two-wire systems are excluded
- Accessories: Humidifier, dehumidifier
- Power: C wire required
- Voice: Alexa, Google Home
Running your schedule without Wi-Fi makes this one useful when the connection drops.
A full-color touchscreen and dual-fuel support cover display and system flexibility.
Who should buy the Bosch BCC110
Best for offline programmable control with a touchscreen.
Who should look past the Bosch BCC110
Set this aside if only a two-wire system is available.
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6. Mysa Smart Thermostat for Heating and Cooling
Best Geofencing Pick
- Geofencing with schedules and vacation mode
- Free app energy charts, with no subscription
- Heat pump optimization, with or without auxiliary heat
- Video guidance for every wire in the app
- A C wire is needed
- Most 24V central systems are covered, not all
- Power: C wire required
- Setup: Video guide for every wire
- Rating: ENERGY STAR certified
Geofencing and vacation mode make away-from-home control simple.
A glowing LED display and video guidance for every wire help with installation and viewing.
Who should buy the Mysa Thermostat
Try this for geofencing and vacation mode in a heat-pump home.
Who should look past the Mysa Thermostat
Put this aside if you cannot add a C wire.
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How to Read Smart Thermostat Reviews Before You Buy
- Compare occupancy sensing, Matter support and voice control side by side, not just displays.
- Note which models run without Wi-Fi, if your connection is unreliable.
- Compare geofencing and vacation mode for homes that are often empty.
- Look at how each model handles humidity, not just temperature.
- Check whether room sensors are included or sold separately before you decide.
Frequently Asked Questions
Which reviewed model still runs its schedule without Wi-Fi?
The Bosch Connected Control BCC110 works as a programmable thermostat without Wi-Fi.
Which model uses geofencing and vacation mode?
The Mysa Smart Thermostat, with geofencing, schedules and vacation mode in a free app. It needs no subscription.
Which thermostat learns how outdoor temperature affects indoor temperature?
The Google Nest Learning Thermostat learns how outdoor temperature affects indoor temperature. It asks permission before changing your schedule.
Does the Sensi Touch 2 need a C wire?
Yes, the Sensi Touch 2 requires a C wire. Its Room Sensors are sold separately.
Final Verdict
For smart thermostat reviews, the ecobee model leads with occupancy sensing and preheating before arrival. Learning control suits the Nest Learning Thermostat, while flexible schedules suit the Honeywell X2S. Touchscreen, offline and geofencing options round out a varied set for different homes.
Best Overall: ecobee Smart Thermostat Enhanced Check Latest Price
Best Learning Pick: Google Nest Learning Thermostat (4th Gen) with Sensor Check Latest Price
Best Schedule Pick: Honeywell Home X2S Smart Wi-Fi Thermostat Check Latest Price
Compare compatibility, scheduling and control first, and the right thermostat will follow.
As an Amazon Associate we earn from qualifying purchases.
As an Amazon Associate we earn from qualifying purchases.
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