10 Best Smart Thermostats in 2026: Ranked & Reviewed

Built-in air quality monitor, radar occupancy sensing, SmartSensor included, and every major smart home platform. The most capable thermostat in 2026.

Best Budget

Amazon Smart Thermostat

$80, ENERGY STAR certified, built by Honeywell Home tech, seamless Alexa and Ring integration. Best value for Alexa households.

Best No C-Wire

Google Nest Thermostat (2020)

No C-wire needed with included Power Connector. Clean mirror-like display, Google Home app, and geofencing-based Eco mode at $130.

A smart thermostat can save you 10–26% on annual heating and cooling costs while keeping your home perfectly comfortable. The best models learn your schedule automatically, use sensors to detect occupancy, and integrate seamlessly with your smart home platform — all from your phone or with a voice command.

We evaluated 10 top smart thermostats on learning capability, smart home platform support, display quality, C-wire requirements, installation ease, room sensor support, and long-term energy savings. Whether you want the most advanced AI learning or just an affordable upgrade from a dumb thermostat, here's everything you need to decide.

Best Overall

ecobee Smart Thermostat Premium

$229.99 ★ 4.3 4,000+ reviews

The ecobee Smart Thermostat Premium is the most feature-rich smart thermostat available, with a built-in air quality monitor, smoke alarm detection, radar-based occupancy sensing, and Siri/Alexa voice control built in. It includes a SmartSensor to balance temperatures across rooms and can save up to 26% on annual heating and cooling costs. Works with virtually every smart home platform including Apple HomeKit, Google Home, Amazon Alexa, and Samsung SmartThings.

Pros

Built-in air quality monitor and smoke alarm detection
Included SmartSensor for room-by-room temperature balancing
Radar occupancy sensing with no camera
Works with Alexa, Google, Siri, and HomeKit

Cons

Premium price point
Requires C-wire for installation

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Best Learning

Google Nest Learning Thermostat (4th Gen)

$239.99 ★ 4.5 5,000+ reviews

The 4th generation Nest Learning Thermostat features a stunning 60% larger circular display with Dynamic Farsight, showing weather and temperature from across the room. It uses AI to learn your schedule and preferences, saving up to 31% on heating and cooling, and now includes full Apple HomeKit support alongside Alexa and Google Home. A Nest Temperature Sensor is included in the box.

Pros

Learns your schedule automatically with AI
Beautiful 2.7-inch circular display with Dynamic Farsight
Includes Nest Temperature Sensor
No C-wire required for most homes

Cons

Higher price than previous generations
Best features require Google ecosystem

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Best No C-Wire

Google Nest Thermostat (2020)

$129.99 ★ 4.4 20,000+ reviews

The Google Nest Thermostat (2020) offers an affordable entry into smart home climate control with a clean mirror-like display and Google Home app integration. It uses a Power Connector accessory for homes without a C-wire, making installation easy without any new wiring. Schedule Away mode and Eco Temperatures help save energy automatically, and it works with Alexa and Google Assistant for voice control.

Pros

No C-wire required with included Power Connector
Budget-friendly Nest option
Clean minimalist design
Works with Alexa and Google Assistant

Cons

No Apple HomeKit support
Does not support Nest Temperature Sensors
No touchscreen

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Honeywell Home T9

$179.99 ★ 4.5 1,800+ reviews

The Honeywell Home T9 excels at multi-room temperature control, allowing you to prioritize comfort in specific rooms using optional Smart Room Sensors. The included sensor covers up to 200 ft and detects both temperature and occupancy. It features a 3.5-inch color touchscreen and supports geofencing for automatic away mode when you leave home.

Pros

Excellent room sensor prioritization system
Includes one Smart Room Sensor
Wide smart home compatibility including HomeKit and IFTTT
Reliable geofencing for auto-away

Cons

Requires C-wire
Additional sensors add to cost

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Sensi Touch 2 Smart Thermostat

$155.99 ★ 4.4 600+ reviews

The Emerson Sensi Touch 2 features a large, vivid glass touchscreen with a modern design and one of the best-in-class guided installation experiences available. It offers flexible 7-day scheduling, geofencing, and optional room sensor support. Emerson has a century of HVAC expertise behind this thermostat, and it commits to strong data privacy protections.

Pros

Large, beautiful color touchscreen display
Best-in-class app-guided installation
Strong data privacy commitment
ENERGY STAR certified

Cons

Requires C-wire
Room sensors sold separately

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Best Budget

Amazon Smart Thermostat

$79.99 ★ 4.4 6,000+ reviews

The Amazon Smart Thermostat is the best value smart thermostat for Alexa households, built using Honeywell Home technology with 130 years of HVAC expertise. It is ENERGY STAR certified and can save an average of $50 per year on energy bills. Setup is straightforward through the Alexa app and it integrates seamlessly with Ring security devices and Alexa routines.

Pros

Most affordable smart thermostat from a major brand
Seamless Alexa and Ring integration
ENERGY STAR certified
Easy DIY installation under 30 minutes

Cons

Only works with Amazon Alexa (no Google Home or HomeKit)
No remote room sensor support
Requires C-wire

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Wyze Smart Thermostat

$69.99 ★ 4.3 8,000+ reviews

The Wyze Thermostat delivers premium smart thermostat features at an unbeatable price, making it the best value option for non-Alexa households. It works with 90% of home HVAC systems and includes a C-wire adapter for homes that need one. The Wyze app provides clean energy usage insights and supports 7-day scheduling, geofencing, and optional Wyze Room Sensors.

Pros

Lowest price among full-featured smart thermostats
Works with Alexa and Google Assistant
C-wire adapter included in box
Room sensor support available

Cons

No Apple HomeKit support
Room sensors sold separately
Only supports 2.4 GHz Wi-Fi

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Bosch Connected Control BCC50

$89.00 ★ 3.9 800+ reviews

The Bosch BCC50 offers reliable, no-frills smart thermostat performance backed by Bosch's trusted engineering. It supports most 24VAC heating and cooling systems and is controlled via 5 backlit touch buttons or the Bosch Connected Control app. Voice control works with Amazon Alexa and Google Assistant, making it a dependable choice for straightforward smart thermostat needs.

Pros

Trusted Bosch engineering and build quality
Affordable mid-range price
Works with Alexa and Google Assistant
Compatible with most 24VAC systems

Cons

No geofencing support
No remote room sensor capability
App registration can be frustrating

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Honeywell Home T6 Pro

$147.99 ★ 4.2 500+ reviews

The Honeywell Home T6 Pro is a highly capable programmable smart thermostat supporting up to 3 Heat/2 Cool heat pump or 2 Heat/2 Cool conventional systems, making it ideal for complex HVAC configurations. It features 7-day flexible scheduling, geofencing via the Resideo app, and voice control with Alexa, Google, and Siri. ENERGY STAR certified with an extended 5-year warranty.

Pros

Supports complex multi-stage HVAC systems (3H/2C)
Works with Alexa, Google, and Siri
ENERGY STAR certified
Extended 5-year warranty

Cons

No touchscreen display
No room sensor support
Basic app compared to premium models

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#10

ecobee3 lite

$149.99 ★ 4.4 12,000+ reviews

The ecobee3 lite is the entry point into the ecobee ecosystem, offering excellent smart home compatibility at a lower price than the Premium model. It supports Apple HomeKit, Google Assistant, and Amazon Alexa, and is compatible with ecobee's SmartSensors (sold separately) for room-by-room temperature balancing. A Power Extender Kit is included for homes without a C-wire.

Pros

Works with HomeKit, Alexa, and Google
Compatible with ecobee SmartSensors
Power Extender Kit included for no C-wire homes
ENERGY STAR certified

Cons

No built-in voice control
Room sensors sold separately
Smaller display than ecobee Premium

View on Amazon

Smart Thermostat Comparison Table

Thermostat	Price	Learning	Smart Platform	C-Wire	Stars
ecobee Smart Premium Best Overall	$229.99	Yes	Alexa, Google, HomeKit, SmartThings	Required	★ 4.3
Google Nest Learning 4th Gen	$239.99	Yes (AI)	Alexa, Google, HomeKit	No (most homes)	★ 4.5
Google Nest Thermostat 2020 Best No C-Wire	$129.99	No	Alexa, Google	No (Power Connector)	★ 4.4
Honeywell Home T9	$179.99	Yes (geofencing)	Alexa, Google, HomeKit	Required	★ 4.5
Sensi Touch 2	$155.99	No (schedule)	Alexa, Google, SmartThings	Required	★ 4.4
Amazon Smart Thermostat Best Budget	$79.99	No (Alexa Hunches)	Alexa only	Required	★ 4.4
Wyze Smart Thermostat	$69.99	No (schedule)	Alexa, Google	No (adapter included)	★ 4.3
Bosch BCC50	$89.00	No	Alexa, Google	Required	★ 3.9
Honeywell Home T6 Pro	$147.99	No (schedule)	Alexa, Google, Siri	Required	★ 4.2
ecobee3 lite	$149.99	No (schedule)	Alexa, Google, HomeKit	No (Power Extender)	★ 4.4