Best Smart Thermostats 2026

Pros

• + Built-in Alexa voice assistant removes the need for a separate smart speaker
• + Bundled room sensor improves temperature accuracy in multi-room homes
• + Matter support future-proofs it against ecosystem lock-in

Cons

• − Requires a C-wire or the included power extender kit on older HVAC systems
• − Premium tier costs more than functionally similar competitors

Pros

• + Lowest price of the major smart thermostat brands tested
• + Savings Finder feature surfaces schedule tweaks to cut energy use
• + Thread radio supports a broader smart-home mesh going forward

Cons

• − No bundled room sensor — multi-room accuracy requires a separate purchase
• − Smaller display is harder to read from across a room

Pros

• + Works with both Alexa and Google Assistant without a brand preference
• + Bundled smart room sensor at a lower price than Ecobee's sensor bundle
• + Geofencing adjusts schedule automatically based on phone location

Cons

• − App interface is less polished than Nest or Ecobee
• − Fewer Matter/Thread-based smart home integrations

Pros

• + Cheapest tested option by a wide margin
• + ENERGY STAR certified with utility rebate eligibility in most US regions
• + Simple app pairs cleanly with existing Alexa routines

Cons

• − No physical display — every adjustment goes through the app or a speaker
• − Fewer third-party integrations than Ecobee or Nest