Compare Smart Thermostats

16 ranked products · Two to 4 at a time · Updated 21 Aug 2026

Pick any two to four of the 16 ranked smart thermostats and read them side by side. This page opens on the board's top 3, Ecobee Smart Thermostat Premium, Google Nest Learning Thermostat (4th Gen) and Ecobee Smart Thermostat Essential.

Choose what to compare

3 of 4 chosen

Smart Thermostats compared side by side. Each column is one product, each row is one measure taken from the same research that built the board.
Measure	Ecobee Ecobee Smart Thermostat Premium	Google Google Nest Learning Thermostat (4th Gen)	Ecobee Ecobee Smart Thermostat Essential	Ecobee Ecobee Smart Thermostat Enhanced	Sensi Sensi Touch 2	Amazon Amazon Smart Thermostat	Honeywell Honeywell Home T9 Smart Thermostat	Honeywell Honeywell Home X8S	Mysa Mysa Smart Thermostat for Electric Baseboard Heaters	Google Google Nest Thermostat (standard)	Aqara Aqara W200 Thermostat	Vivint Vivint Smart Thermostat	Cielo Cielo Breez Max	Google Google Nest Learning Thermostat (3rd Gen)	Honeywell Honeywell Home X2S	Wyze Wyze Thermostat
Tier	S	A	A	B	B	C	C	C	C	C	D	F	F	F	F	F
Rank on this board	1 of 16	2 of 16	3 of 16	4 of 16	5 of 16	6 of 16	7 of 16	8 of 16	9 of 16	10 of 16	11 of 16	12 of 16	13 of 16	14 of 16	15 of 16	16 of 16
Ladder points	1020 LP	827 LP	709 LP	644 LP	505 LP	472 LP	465 LP	430 LP	406 LP	375 LP	286 LP	184 LP	135 LP	127 LP	63 LP	0 LP
Our verdict	The premium model delivers the most consistent temperature control, robust air-quality monitoring and a long-term firmware track record. Its hardware is durable, warranty is 2 years with optional 5-year extension, and support is responsive.	The latest Nest offers the best learning algorithm, seamless integration with Google Home, and a solid build. Firmware updates have been consistent for three years, and its 3-year warranty plus optional extended plan gives peace of mind.	The Essential model keeps the core strengths of the Premium (learning, air-quality sensors) at a lower price point. Its hardware is proven over multiple years and it shares the same warranty terms as the Premium.	Lacks key features of Premium, making it a poor value.	The Touch 2 is known for its straightforward interface, reliable Wi-Fi connectivity and a 2-year warranty. Firmware updates have been stable over the last 18 months, and it has a strong support reputation.	The Amazon Smart Thermostat offers a very low price point but falls short on learning, HVAC compatibility, and firmware stability, leading to poor long-term reliability.	The T9 offers excellent HVAC compatibility and a solid price-to-performance ratio. It has a 2-year warranty, firmware updates have been regular for the past year, and support is generally reliable.	Best overall Honeywell model, strong performance just below the top two.	Tailored for electric baseboards, it offers precise temperature control and a long-term firmware track record. The unit comes with a 2-year warranty and has been praised for its reliability in independent reviews.	Basic functionality with no learning; outclassed by the 4th-gen model.	The Aqara W200 Thermostat’s low cost is offset by frequent connectivity problems, short warranty, and minimal firmware support, making it unreliable long term.	Despite heavy marketing, the Vivint Smart Thermostat suffers from weak firmware support, short warranty, and frequent connectivity issues, undermining its long-term reliability.	Solid performance, but its feature set and price place it below the main contenders.	Superseded hardware at near-current prices; the 4th Gen or the standard Nest is the correct buy.	The X2S is a budget-friendly option that still delivers solid performance and a 3-year warranty. Firmware updates have been consistent for the past year, and it has a good support reputation.	Without learning capability or robust firmware updates, the Wyze Thermostat’s hardware reliability is questionable, with many units failing early and support being minimal.
What reviewers rate	Consistent temperature control Robust air-quality sensors Durable hardware Built-in Alexa integration	Best learning algorithm Seamless Google Home integration Solid build Advanced learning algorithms	Core learning features Air-quality sensors Lower price Affordable	Same reliable hardware as Premium at lower cost 10-year warranty Firmware longevity Delivers ~90% of the Premium experience for meaningfully less money	Straightforward interface Reliable Wi-Fi Strong support Geofencing	Low price Alexa support Roughly half the price of flagship rivals Energy Star certified	Excellent HVAC compatibility Solid price-to-performance Room-sensor network Strong Wi-Fi connectivity	Large touchscreen Advanced HVAC controls Rugged build 10-year warranty	Precise control for baseboards Long-term firmware stability Native electric baseboard support Energy savings	Clean design Solid performance Good temperature control for most homes Solid warranty	Budget-friendly Solid Wi-Fi control Voice integration with Alexa and Google Assistant Sleek design	A perfectly decent thermostat in itself Fits naturally inside an existing Vivint security setup	Wi-Fi connectivity Supports heating and cooling Easy-to-use app Good integration with smart-home ecosystems	The classic that built Nest's reputation Still delivers the original Nest learning-thermostat experience	Budget friendly Solid performance 3-year warranty Solid basic hardware	Very cheap, on paper a lot of thermostat for very little money
Where it falls short	It is expensive for what it does	It is the priciest mainstream option Hard to justify when the Essentials do most of it for half the price	Costs more than the Amazon Smart Thermostat	No built-in Alexa No air-quality sensor Lacks the full Premium feature set	The T9 and Ecobee Enhanced give more per dollar at its typical price	No learning algorithm Limited HVAC compatibility Sporadic firmware updates Limited feature set	Nothing recorded	Pricing sits close to the Ecobee Premium and Nest 4th Gen without clearly beating either	A niche product, only relevant to electric baseboard heating	No learning algorithm Limited HVAC control Only the basics, with no learning behavior or premium extras	Frequent connectivity drops Limited firmware updates 1-year warranty Poor integration with major ecosystems	Weak firmware support 1-year warranty Frequent connectivity problems High price	Does not control central HVAC, despite being cross-shopped as a smart thermostat Strictly worse than a real thermostat at its price for ducted homes Even for ductless homes, Mysa-style or native controller options deserve a look first	Superseded by the 4th Gen yet still sold at prices that often overlap with its replacement Owners report units changing the temperature on their own TechRadar and Popular Mechanics both crown the 4th Gen, not this one	Outdated interface Lack of modern connectivity options Shorter warranty Early relay failures	No learning algorithm Thin firmware update history Hardware failures within first year Limited connectivity options
Evidence behind it	13 sources across 12 outlets	29 sources across 27 outlets	15 sources across 15 outlets	10 sources across 9 outlets	13 sources across 12 outlets	19 sources across 18 outlets	17 sources across 16 outlets	33 sources across 28 outlets	1 source across 1 outlet Thin sourcing, read it as provisional	20 sources across 19 outlets	40 sources across 31 outlets	1 source across 1 outlet Thin sourcing, read it as provisional	7 sources across 6 outlets	18 sources across 18 outlets	12 sources across 10 outlets	6 sources across 6 outlets
Flagged as one to avoid	Not flagged	Not flagged	Not flagged	1 of 7 research runs	Not flagged	3 of 10 research runs	Not flagged	1 of 9 research runs	Not flagged	1 of 9 research runs	3 of 5 research runs	4 of 5 research runs	1 of 7 research runs	2 of 5 research runs	2 of 5 research runs	6 of 9 research runs
Announced	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded
Where to buy	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it	Check it

Every column is the same research that built the board. Nothing here is a specification sheet copied from a maker. Read how we rank for what a tier and a ladder point mean.