Smart homes are becoming the new standard in 2025, and one of the smartest upgrades you can make is switching to a voice-compatible smart thermostat. These devices not only help automate your heating and cooling but also integrate seamlessly with virtual assistants like Amazon Alexa and Google Home.
In this comprehensive guide, we’ll explore the top 5 smart thermostats compatible with both Alexa and Google Home, breaking down their features, pros and cons, pricing, and who they’re best for.
Why Voice-Control Compatibility Matters
Voice control allows homeowners to adjust their home’s temperature simply by saying, “Alexa, set the temperature to 72 degrees,” or “Hey Google, turn off the AC.” This not only adds convenience but also contributes to energy savings, especially when paired with automation schedules and sensors.
Other benefits include:
Hands-free operation
Smart routines and geofencing
Energy tracking reports
Remote access via mobile apps
Increased resale value of home
1. Google Nest Learning Thermostat (3rd Gen)
Compatibility: Google Assistant, Alexa
Average Price: $199 – $229
Key Features:
Learns your daily schedule and adjusts automatically
Sleek, minimalist design with stainless steel finish
Energy-saving leaf icon and Home/Away Assist
Remote control via the Google Home app
Compatible with 95% of HVAC systems
Pros:
Adaptive learning system
Detailed energy usage reports
Wide HVAC compatibility
Cons:
Slightly higher price
No remote temperature sensors (need to buy separately)
Best For:
Homeowners looking for a set-it-and-forget-it experience with a sleek design and solid ecosystem support.
2. Ecobee SmartThermostat with Voice Control
Compatibility: Alexa (Built-in), Google Assistant, Siri
Average Price: $219
Key Features:
Built-in Alexa + support for Siri and Google
Comes with SmartSensor for room-based adjustments
Spotify and voice call integration
Detailed energy insights and reports
HomeKit-compatible
Pros:
Built-in Alexa mic & speaker
Controls cold/hot spots via SmartSensors
Integrates with multiple platforms
Cons:
Slight learning curve in app
Slightly bulkier design than Nest
Best For:
Smart home enthusiasts who want robust voice features and full-room temperature accuracy.
3. Honeywell Home T9 Smart Thermostat
Compatibility: Alexa, Google Assistant, SmartThings
Average Price: $169 – $189
Key Features:
Smart Room Sensors included (up to 20 ft range)
Geofencing tech to adjust temperature when you leave/arrive
Energy Star certified
Strong app performance (Resideo)
Pros:
Budget-friendly
Easy setup with step-by-step guide
Great for larger homes with room-by-room accuracy
Cons:
Sensors require batteries
Voice setup takes a few extra steps
Best For:
Families with multiple rooms and varying heating/cooling needs.
4. Emerson Sensi Touch Smart Thermostat
Compatibility: Alexa, Google Assistant, Apple HomeKit
Average Price: $129 – $149
Key Features:
Large touchscreen display
Custom scheduling and energy usage tracking
HVAC alerts and usage data
No common wire (C-wire) needed for most setups
Pros:
Budget option with premium features
Easy install, even for beginners
No extra hub required
Cons:
UI is less modern than Nest/Ecobee
Lacks advanced room sensors
Best For:
Budget-conscious users wanting quick install and compatibility with all major assistants.
5. Amazon Smart Thermostat
Compatibility: Alexa
Average Price: $80 – $90
Key Features:
Built-in Alexa integration (no speaker)
Designed with Honeywell technology
Supports Hunches (automated routines)
Control via Alexa app
Pros:
Extremely affordable
Works great in small apartments or rental homes
Simple app-based setup
Cons:
Doesn’t support Google Assistant
No touchscreen display
Best For:
Renters or first-time smart thermostat buyers on a tight budget.
Final Buying Tips
When choosing the best smart thermostat for Alexa or Google Home in 2025, consider:
Assistant Preference: If you use Google Home more than Alexa, go for Nest. If you’re deep into Amazon’s ecosystem, Ecobee or Amazon Smart Thermostat are great choices.
Sensor Needs: Have a large home? Then go for Ecobee or Honeywell T9.
Budget: Amazon Smart Thermostat is cheapest, while Ecobee offers premium control.
Comparison Table
| Thermostat | Alexa | Google Home | Smart Sensors | Avg. Price | Built-in Voice |
|---|---|---|---|---|---|
| Google Nest (3rd Gen) | ✅ | ✅ | ❌ (optional) | $199 | ❌ |
| Ecobee w/ Voice Ctrl | ✅ | ✅ | ✅ | $219 | ✅ (Alexa) |
| Honeywell T9 | ✅ | ✅ | ✅ | $179 | ❌ |
| Emerson Sensi Touch | ✅ | ✅ | ❌ | $139 | ❌ |
| Amazon Thermostat | ✅ | ❌ | ❌ | $89 | ❌ |
Conclusion
Choosing a smart thermostat that’s compatible with Alexa or Google Home makes managing your home easier and more energy efficient. In 2025, these devices are smarter, faster, and more connected than ever.
Start small, go smart — and let your thermostat do the thinking for you.
Have questions or experiences to share? Drop them in the comments below and join the smart home revolution!
