Updated: September, 2025

Best smart thermostat unders 100

Save up to 50% Off

1

ecobee

9.9

Exceptional

ecobee Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant

Why we love it

Easy installation with clear instructions.

Smart sensor optimizes room comfort.

Integrated voice control with Alexa and Siri.

Main highlights

Energy Savings and Comfort
Save up to 26% annually on heating and cooling.

Smart Home Integration
Ideal for homes with Alexa, Siri, and Google Assistant.

Customer Praises Smart Sensor
Enhances comfort by adjusting temperature based on room occupancy.

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How do we rank?

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Real users impact

Thousands of users trust our site daily

Based on millions of stores and reviews

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Analyzing top stores
How do we rank?

Using our advanced technology, we scan thousands of products and stores, analyzing reviews, ratings, and trends to find what matters most to users like you.

Our team then reviews the data and real user feedback, combining AI and human insights to bring you real-time, top-rated recommendations to guide your decisions with clarity and confidence.
2

Emerson

9.7

Exceptional

Sensi Touch 2 Smart Thermostat with Touchscreen Color Display, 100 Years of Expertise, Programmable, Wi-Fi, Data Privacy, Easy DIY, Works with Alexa, Energy Star Certified, ST76W, C-Wire Required

21% Off

Main highlights

WORKS WITH ROOM SENSORS: Compatible with Sensi Room Sensors to balance temperatures throughout your home (sold separately)

SAVE ABOUT 23% ON HVAC ENERGY: The ENERGY STAR-certified Sensi Touch 2 smart thermostat can help you save energy with features like flexible scheduling, remote access and usage reports

PRIVACY PROTECTION: Sensi won’t sell your personal information to third parties

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3

Emerson

9.6

Exceptional

Sensi Smart Thermostat, 100 Years Of Expertise, Wi-Fi, Data Privacy, Programmable, Easy DIY Install, Works With Alexa, Energy Star Certified, Mobile App, ST55

50% Off

Why we love it

Easy DIY installation without a C-wire.

Energy savings with flexible scheduling.

Comprehensive smart maintenance alerts.

Main highlights

Energy Saving Feature
ENERGY STAR-certified, saves up to 23% on HVAC energy.

Ideal for Smart Homes
Works seamlessly with Alexa and other smart home systems.

Praised Manual Controls
Customers love the clear screen and intuitive button controls.

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4

Emerson

9.5

Excellent

Sensi Lite Smart Thermostat, Data Privacy, Programmable, Wi-Fi, Easy DIY, Works With Alexa, Energy Star Certified, ST25, Most Systems C-Wire Not Required, Except On Heat/Cool Only and Heat Pump System

12% Off

Why we love it

Easy DIY installation with built-in level.

Remote control via mobile app.

Energy-efficient, saves on HVAC costs.

Main highlights

Easy Installation and Compatibility
Simple DIY setup with built-in level; works with most home HVAC systems.

Ideal for Energy Savings
Perfect for households wanting to reduce HVAC energy costs with flexible scheduling.

Highly Rated Mobile App Control
Customers praise the convenience of controlling the thermostat remotely via smartphone.

More info
5

ecobee

9.3

Excellent

New 2025 ecobee Smart Thermostat Essential - Energy Star Certified programmable Wi-Fi Thermostat - Works with Siri, Alexa, and Google Assistant
6

meross

9.2

Excellent

meross Smart Thermostat for Home, WiFi Thermostat Works with Matter, Alexa, Apple Home, Google Assistant, App & Voice Control, 7x24h Scheduling, Energy Saving, C-Wire Required

20% Off

Why we love it

Compatible with most systems.

Easy DIY installation.

Energy-saving capabilities.

Main highlights

Wide Compatibility with Heating and Cooling Systems
Compatible with 95% of systems, excluding electric baseboard heaters. C wire required; adapter available.

Perfect for Smart Home Integration
Integrates with Apple Home, Alexa, Google Home, and SmartThings via Matter technology.

Highly Praised Smart Scheduling
Offers 7x24h scheduling for effortless temperature management, even offline.

More info
7

Honeywell Home

9.0

Excellent

Honeywell Home RTH8800WF2022, T5 WiFi Smart Thermostat, 7 Day-Programmable Touchscreen, Alexa Ready, Geofencing Technology, Energy Star, C-Wire Required

19% Off

Why we love it

Significant energy savings potential.

Compatible with major smart home systems.

Simple installation process.

Main highlights

Energy Efficiency Savings
Save between 8% and 16% on heating and cooling bills with the T5 thermostat's scheduling feature.

Smart Home Integration
Ideal for users wanting remote control via Alexa, Apple HomeKit, or Google Assistant.

Easy Installation and Use
Customers praise the straightforward installation and effective remote temperature control.

More info
8

ecobee

8.8

Very Good

ecobee Smart Thermostat Enhanced - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant - Energy Star Certified - Smart Home

16% Off

Why we love it

Energy-efficient, saves up to 26% annually.

Compatible with major smart home systems.

User-friendly interface with remote control.

Main highlights

Energy Savings
Save up to 26% annually on heating and cooling costs.

Smart Home Integration
Ideal for homes using Siri, Alexa, or Google Assistant.

User-Friendly Interface
Praised for its intuitive touchscreen and easy navigation.

More info
9

Honeywell Home

8.7

Very Good

Honeywell Home RTH9585WF1004 Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, Gray

35% Off

Why we love it

Customizable color touchscreen.

Smart learning for efficient heating.

Energy Star certified for savings.

Main highlights

Customizable Color Touchscreen
Personalize your thermostat to fit your décor with a vibrant, easy-to-read screen.

Ideal for Smart Home Integration
Perfect for homes with Wi-Fi connectivity and compatible smart devices.

Praised Smart Learning Feature
Learns heating/cooling times to maintain comfort efficiently.

More info
10

Google Nest

8.5

Good

Google Nest Learning Thermostat - 3rd Gen (2015) - Programmable Smart Thermostat for Home - Works with Alexa - Stainless Steel

38% Off

Why we love it

Learns and adapts to your schedule.

Control temperature from anywhere.

Outstanding customer service support.

Main highlights

Effortless Programming
Automatically learns your schedule and programs itself, saving time and energy.

Remote Control Convenience
Ideal for controlling your home's temperature from anywhere via the Nest app.

Exceptional Customer Support
Praised for its responsive and helpful customer service, ensuring a smooth user experience.

More info

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Our top pick

1

ecobee Smart Thermostat Premium with Smart Sensor and Air Quality Monitor - Programmable Wifi Thermostat - Works with Siri, Alexa, Google Assistant
The ecobee Smart Thermostat Premium is a cutting-edge device designed to enhance home comfort and energy efficiency. It boasts an impressive ability to save up to 26% annually on heating and cooling costs, making it an eco-friendly choice for budget-conscious homeowners. Ideal for smart homes, it seamlessly integrates with Alexa, Siri, and Google Assistant, allowing for convenient voice control. One of its standout features is the Smart Sensor, which intelligently adjusts temperature based on room occupancy to ensure optimal comfort. Installation is straightforward, aided by clear instructions and included components like a power extender kit for homes without a C-wire. Additionally, the thermostat doubles as a home monitoring hub with air quality monitoring and security alerts, providing valuable insights and peace of mind. With its sleek design and user-friendly app, the ecobee Smart Thermostat Premium is a versatile and reliable choice for modern households seeking to optimize their living environment.

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