Smart Thermostats
Best Smart Thermostat with Alexa (2026): Our 5 Picks Ranked
As an Amazon Associate we earn from qualifying purchases. Specs below come from each product's Amazon listing; we do not test products in person.
For the best smart thermostat with alexa, the Google Nest Learning Thermostat leads this list: it works without a C wire, includes a Nest Temperature Sensor, and answers to Alexa voice control. If you want room sensors sold separately, the Sensi Touch 2 is the runner-up.
Starting out? See the main guide: Best Smart Thermostat
Top picks at a glance
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Best OverallGoogle Nest Learning Thermostat9.8 View on Amazon -
Runner-UpSensi Touch 2 Smart Thermostat Wi-Fi9.6 View on Amazon -
Also Greatecobee Comfort and Security Bundle9.3 View on Amazon -
Also Greatmeross Smart Thermostats for Home9.3 View on Amazon -
9.2 View on Amazon
Compare the specs
Ranked on works without a c-wire, room sensor support, works with alexa / google, energy star, phone app control from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | Works without a C-wire | Room sensor support | Works with Alexa / Google | ENERGY STAR | Phone app control | Weight | Warranty |
|---|---|---|---|---|---|---|---|
| 1. Google Nest Learning Thermostat | Yes | Yes | Yes | Yes | Yes | 0.36 lb | — |
| 2. Sensi Touch 2 Smart Thermostat Wi-Fi | — | Yes | Yes | Yes | Yes | 0.62 lb | 3-year |
| 3. ecobee Comfort and Security Bundle | — | Yes | Yes | Yes | — | — | — |
| 4. meross Smart Thermostats for Home | — | — | Yes | — | Yes | 0.54 lb | 3-year |
| 5. Honeywell Home X8S Premium Smart Wi-Fi Thermostat | — | — | Yes | Yes | Yes | 0.95 lb | — |
Google Nest Learning Thermostat
It works without a C wire in most homes, includes a Nest Temperature Sensor, and answers to Alexa, Siri and Google Assistant voice control.
- Works without a C-wire
- Room sensor support
- Works with Alexa / Google
- ENERGY STAR
- Phone app control
Good for
- Buyers who want Alexa voice control with a sensor
- Buyers who want no C wire in most homes
Skip it if
- You want a thermostat under 0.36 lb
- You want a display larger than 3.5 inches
It adjusts from a phone anywhere through the Google Home app, or by voice with Alexa, Siri or Google Assistant, and it is Matter compatible. It manages hot and cold spots with the included Nest Temperature Sensor, which you can place in any room. It learns how outside temperature affects inside temperature and pauses the system, and it asks permission before schedule changes.
Sensi Touch 2 Smart Thermostat Wi-Fi
It pairs room sensor support with Alexa and Google Assistant voice control, phone app control and a 3-year warranty.
- Room sensor support
- Works with Alexa / Google
- ENERGY STAR
- Phone app control
- 3-year warranty stated
Good for
- Buyers who want room sensors to balance temperatures
- Buyers who want a touchscreen with app control
Skip it if
- You want a thermostat under 0.62 lb
- You want a thermostat without a C wire
It works with Sensi Room Sensors, sold separately, to balance temperatures throughout the home. It has an LCD touchscreen, Bluetooth and Wi-Fi, and control by app, touch or voice. It works with air conditioner, boiler, furnace and heat pump equipment, and the box holds an installation guide, mounting hardware, an owner's manual and a warranty booklet. It carries a 3-year warranty.
ecobee Comfort and Security Bundle
It pairs built-in Alexa and Siri with a SmartSensor and alerts for doors, windows and smoke alarms.
- Room sensor support
- Works with Alexa / Google
- ENERGY STAR
Good for
- Buyers who want built-in Alexa and Siri
- Buyers who want door and window alerts
Skip it if
- You want unexpected-movement alerts without a subscription
- You want a thermostat that runs on batteries
It has built-in Alexa and Siri, and the SmartSensor covers rooms as a motion and occupancy sensor, while separate contact sensors cover doors and windows. It listens for smoke alarm sounds and sends alerts when a door or window opens, with a subscription for unexpected movement alerts. It is ENERGY STAR certified and works with 95% of systems, with a Power Extender Kit in the box.
meross Smart Thermostats for Home
It pairs Matter integration with Alexa, Apple Home and Google Assistant voice control and app control.
- Works with Alexa / Google
- Phone app control
- 3-year warranty stated
Good for
- Buyers who want Matter control with Alexa
- Buyers who want a 24/7 flexible schedule
Skip it if
- You want a thermostat without a C wire
- You want a warranty longer than 3 years
It integrates locally with Matter-certified platforms, including Apple Home, Alexa, Google Home and Samsung SmartThings. The 24/7 flexible schedule plans let you customize heating and cooling for home, away or asleep. It sends alerts about filter life and system malfunctions, and it fits 95% of HVAC systems.
Honeywell Home X8S Premium Smart Wi-Fi Thermostat
It pairs a 5-inch touchscreen with Alexa, Google Assistant and Apple Home control and humidity control.
- Works with Alexa / Google
- ENERGY STAR
- Phone app control
Good for
- Buyers who want a 5-inch touchscreen
- Buyers who want doorbell camera view on the thermostat
Skip it if
- You want a thermostat under 0.95 lb
- You want a thermostat without a C wire
It shows doorbell camera view and intercom from the thermostat, with a customizable 5-inch display. It controls humidity and ventilation for indoor air quality, with occupancy and presence detection that adjusts settings. It works with up to 3 heat and 2 cool heat pump systems and is ENERGY STAR certified.
How to choose
Choosing the best smart thermostat with alexa
Alexa control differs across these picks. The Nest Learning Thermostat answers to Alexa, Siri and Google Assistant, the Sensi answers to Alexa and Google Assistant, the ecobee has built-in Alexa and Siri, the meross answers to Alexa, Apple Home and Google Assistant, and the Honeywell answers to Alexa, Google Assistant and Apple Home. Check the voice platforms for the pick you want before you buy.
C-wire and sensor needs
A C wire gives a thermostat steady power from the heating and cooling system. The Nest Learning Thermostat works without a C wire, while the Sensi, meross and Honeywell state that a C wire is required. For room sensors, the Nest includes a Temperature Sensor, the Sensi works with sensors sold separately, and the ecobee includes a SmartSensor.
Schedules, alerts and displays
A schedule holds heating and cooling settings across the day, while alerts tell you about filter life or system faults. The meross offers a 24/7 flexible schedule with filter life and system malfunction alerts, and the Sensi gives usage reports with equipment alerts and maintenance reminders. For displays, the Honeywell has a 5-inch touchscreen and the Nest has a 3.5-inch touchscreen.
FAQ
Which thermostats here work with Alexa?
All five work with Alexa: the Nest, Sensi, ecobee, meross and Honeywell each answer to Alexa voice control.
Do I need a C wire for these thermostats?
The Nest works without a C wire, while the Sensi, meross and Honeywell state that a C wire is required.
Which thermostat includes a room sensor?
The Nest includes a Nest Temperature Sensor, and the ecobee includes a SmartSensor. The Sensi works with sensors sold separately.
What displays do these thermostats have?
The Honeywell has a 5-inch touchscreen, the Nest has a 3.5-inch touchscreen, and the Sensi has an LCD touchscreen.
