Best Smart Thermostat (2026): ecobee, Nest, Honeywell and Sensi Compared

The best smart thermostat for most homes is the ecobee Smart Thermostat Premium, which Smart Home Solver, a YouTube smart-home reviewer, named the clear winner over Google’s new Nest Learning Thermostat for its easier-to-read touchscreen, occupancy-sensing room sensors and deeper smart-home integration.

The Nest Learning Thermostat (4th gen) is the pick if you lack a C-wire or want a thermostat that learns for you; 6 Months Later, a YouTube channel that reviews products after long-term use, said it lived up to that promise after half a year. Below are top sellers from multiple brands, with Amazon prices checked October 16, 2026.

Best smart thermostat: picks at a glance

Prices checked on Amazon Oct 16, 2026. I may earn a commission from links, at no cost to you.

1. ecobee Smart Thermostat Premium: best overall

Smart Home Solver compared the ecobee Smart Thermostat Premium with the Nest Learning Thermostat (4th gen) in his home and preferred the ecobee’s flat touchscreen, adjustable brightness and more precise scheduling, with changes allowed 30 minutes apart. Its included SmartSensor detects occupancy, enabling a Follow Me mode that averages only occupied rooms. He also found it integrated more fully with Apple Home and Home Assistant, exposing presets, fan control and remote sensors. ecobee lists up to 26% energy savings versus a 72°F hold, a built-in air quality monitor, Siri and Alexa built in, and compatibility with 95% of HVAC systems.

2. Google Nest Learning Thermostat (4th gen): best learning thermostat

The Google Nest Learning Thermostat (4th gen) learns the temperatures you like from your adjustments, outdoor conditions and time of day. 6 Months Later said it once moved his daytime cooling comfort temperature from 74°F to 72°F on its own after he enabled adaptive features, and that a Suggestions mode lets you approve changes instead. Google lists up to 31% savings, a 60% larger display with Dynamic Farsight, Matter support and no C-wire needed in most homes. A temperature sensor comes in the box. See Nest Learning Thermostat 4th Gen Review.

3. ecobee Smart Thermostat Enhanced: best value ecobee

One Hour Smart Home, a YouTube channel focused on smart-home installs, said the ecobee Smart Thermostat Enhanced operates almost identically to the Premium, with the same larger screen and occupancy sensing, for typically $50 to $70 less. You give up the in-box room sensor, built-in Alexa speaker, air-quality sensor and extra wiring terminals. ecobee includes a Power Extender Kit for homes without a C-wire. See Ecobee Premium vs Enhanced.

4. Honeywell Home T9: best for multi-room focus

The Honeywell Home T9 with Smart Room Sensor includes one Smart Room Sensor and can focus on specific rooms, such as the bedroom at night, or detect which rooms are occupied, Honeywell says. It lists sensor range up to 200 feet and works with Alexa, Apple HomeKit and Google Assistant. A C-wire is required.

5. Sensi Touch 2: best simple smart thermostat

The Sensi Touch 2 (ST76) lists about 23% HVAC energy savings, a Bluetooth-guided install in the app, maintenance reminders such as filter changes, and a pledge not to sell your personal information. It works with optional Sensi room sensors and requires a C-wire. One Hour Smart Home called Sensi thermostats reliable options that get the job done at a lower price.

6. Honeywell Home RTH9585WF: best budget color touchscreen

The Honeywell Home RTH9585WF Smart Color has a customizable color touchscreen, flexible scheduling including utility peak-rate pricing, monthly energy reports and ENERGY STAR certification, Honeywell says. It requires a C-wire. For an entry ecobee, the ecobee Smart Thermostat Essential lists up to 23% savings and a color touchscreen at $139.99.

Smart thermostats compared

Do smart thermostats save money?

This Old House, the home-improvement show, notes that heating and cooling make up about half of a home’s energy bill and says studies point to roughly 5 to 15% energy savings from smart thermostats, which can pay back the cost fairly quickly. Makers claim more under their own conditions: ecobee up to 26%, Google up to 31%. 6 Months Later said he could not prove savings versus his previous ecobee because of weather differences, but believes the Nest would save money compared with a regular or programmable thermostat.

Features worth paying for

• Room sensors: This Old House says sensors in the rooms you actually use give the system better information than one hallway reading.
• Geofencing and occupancy: both cut heating and cooling when nobody is home, This Old House explains.
• Time-of-use support: pre-heating or pre-cooling before peak rates, then coasting, This Old House says.
• Adjustable temperature swing: Smart Home Solver sets ecobee to 2 degrees so his system cycles less often; he notes Nest uses a fixed 1 degree.
• Smart-home compatibility: check Matter, HomeKit, Alexa or Google support for your setup.

Installation basics

Most smart thermostats need a C-wire for constant 24-volt power, This Old House explains. ecobee includes a Power Extender Kit with the Premium and Enhanced, and Nest works without one in most homes; see Smart Thermostat Without a C-Wire. 6 Months Later said his Nest install took about 40 minutes and recommended a cordless drill.

Video: Smart Home Solver: “Nest vs Ecobee! The BEST Smart Thermostat is…”. Embedded with credit; the findings are the creator’s own.

Video: This Old House: “All About Smart Thermostats”. Embedded with credit; the findings are the creator’s own.

Frequently Asked Questions

What is the best smart thermostat?

Smart Home Solver named the ecobee Smart Thermostat Premium the clear winner over the Nest Learning Thermostat (4th gen); Nest is the pick if you lack a C-wire or want automatic learning.

Do smart thermostats really save money?

This Old House cites studies showing about 5 to 15% energy savings; ecobee and Google claim up to 26% and 31% under their conditions.

Is ecobee or Nest better?

Smart Home Solver preferred ecobee for its screen, sensors and integrations; 6 Months Later recommends Nest for its learning and Matter support.

Which smart thermostat works without a C-wire?

The Nest Learning Thermostat in most homes; ecobee Premium and Enhanced include a Power Extender Kit.

Do I need room sensors?

They help balance hot and cold rooms; This Old House says they let the system focus on the rooms you use.

Sources

• Amazon product listings for the products linked above, checked October 16, 2026
• Smart Home Solver: “Nest vs Ecobee! The BEST Smart Thermostat is…”
• 6 Months Later: “Google Nest Learning Thermostat (4th Gen) Review – 6 Months Later”
• One Hour Smart Home: “Ecobee Smart Thermostat Premium vs Ecobee Smart Thermostat Enhanced”
• One Hour Smart Home: “3 Smart Thermostats That Don’t Require A Common Wire”
• This Old House: “All About Smart Thermostats”

Related: Ecobee vs Nest Thermostat | Nest Learning Thermostat 4th Gen Review | Ecobee Premium vs Enhanced | Smart Thermostat Without a C-Wire