Quick answer: ecobee Enhanced for most homes (best demand-response coverage, Apple HomeKit, 3-year warranty). Google Nest Learning Thermostat if design is the priority. Amazon Smart Thermostat for budget buyers. Heat pumps: ecobee Premium. Electric baseboard: Mysa V2 or Sinopé.

How We Picked

These picks are based on:
– System compatibility: works with the full range of US heating and cooling systems
– Rebate eligibility: ENERGY STAR certification and known utility program qualification
– Demand-response coverage: which thermostats earn the most credits across the widest range of US utility programs
– Actual features: not spec sheet claims; what delivers value in practice

Best Overall: ecobee Enhanced

Price: ~$170 USD | Warranty: 3 years

ecobee Enhanced is the strongest all-around smart thermostat for US homes:
– Native Apple HomeKit support (unique in the category)
– eco+ integrates with the broadest range of US utility demand-response programs
– Power Extender Kit included, no C-wire required
– 3-year warranty (longest in the category)
– Room sensors available as add-on

For demand-response: If you’re in a ConnectedSolutions territory (Massachusetts, Rhode Island, Connecticut, New York), Xcel Energy territory (Colorado, Minnesota), or any of the other programs tracked in Demand Response Payout Comparison: Which Utility Pays the Most?, ecobee qualifies for the most programs.

Best Design: Google Nest Learning Thermostat

Price: ~$250 USD | Warranty: 2 years

For buyers where design matters, the Nest Learning Thermostat is the most attractive thermostat available: circular stainless steel with Farsight display activation. Auto-learning observes your adjustments and builds a schedule.

Trade-offs: No Apple HomeKit, no room sensors, and narrower demand-response coverage than ecobee. If you’re in the Google ecosystem and care how your thermostat looks on the wall, Nest is the choice.

Best Budget: Amazon Smart Thermostat

Price: ~$60–70 USD | Warranty: 1 year

ENERGY STAR certified. Works without a C-wire. Handles standard gas furnace and central AC systems. Alexa built in. For buyers who want scheduling and remote control without spending $150+, it delivers.

Rebate opportunity: ENERGY STAR certification means it qualifies for most utility rebate programs. A $50–75 rebate on a $70 thermostat brings effective cost to $0–20, close to free in many service territories.

Best for Heat Pumps: ecobee Premium

Price: ~$230 USD | Warranty: 3 years

For US homes with ducted heat pumps (cold-climate heat pumps and dual-fuel systems included), ecobee Premium adds the balance point configuration, room sensor, and eco+ setback management that heat pump homes need.

See Best Smart Thermostats for Heat Pumps & Mini-Splits for the full heat pump guide.

Best for Utility Rewards (Demand Response Angle)

If maximizing utility program credits is your priority:

Northeast US (ConnectedSolutions): ecobee qualifies for ConnectedSolutions through National Grid, Eversource, and other Northeast utilities. $75–$170/season.

Colorado and Minnesota (Xcel): ecobee or Nest, both qualify for Xcel AC Rewards.

Washington state (PSE Flex): ecobee for central HVAC; Mysa V2 if you have electric baseboard. PSE Flex is one of the only programs that pays credits on baseboard thermostats.

Full Comparison Table

US picks: ecobee Enhanced, ecobee Premium, Google Nest Learning/Thermostat, Honeywell Home T9, Amazon Smart Thermostat (price, system type, HomeKit, warranty, demand-response coverage)

Rebates Can Cut the Cost

All picks are ENERGY STAR certified. Most US utility territories offer $50–100 rebates for qualifying smart thermostats. In some markets (ConnectedSolutions MA), the demand-response credits alone exceed the thermostat’s purchase price within one season.

Find your utility program: Find Your Utility: Which Smart Thermostat Rebate Programs Apply to You?
See the demand-response payout comparison: Demand Response Payout Comparison: Which Utility Pays the Most?

Frequently Asked Questions

What is the best smart thermostat in the US in 2026?
ecobee Enhanced for most homes: Apple HomeKit support, broadest demand-response coverage, 3-year warranty. Google Nest Learning Thermostat for design and auto-learning. Amazon Smart Thermostat for budget buyers.

Does ecobee or Nest qualify for more US utility rebates?
ecobee qualifies for more utility programs, including demand-response programs. Both are ENERGY STAR certified and appear on most US utility rebate qualifying lists. ecobee’s eco+ has more direct utility integrations for demand-response enrollment.

What is the best budget smart thermostat in the US?
Amazon Smart Thermostat at ~$60–70 USD. ENERGY STAR certified, handles standard HVAC, no C-wire required. After utility rebates ($50–75), effective cost is often under $25.

Does Nest support Apple HomeKit in the US?
No. No current Nest model supports Apple HomeKit in any market. ecobee is the only mainstream smart thermostat with native HomeKit support.

What smart thermostat pays the most in demand-response credits?
ecobee qualifies for ConnectedSolutions (Northeast), which pays $75–$170/season, the highest-paying demand-response program for residential thermostats in the US. See Demand Response Payout Comparison: Which Utility Pays the Most?