Best Smart Thermostats of 2026

Pull a Sensi out of the box and it looks like the thermostat it replaces: the same footprint, the same wall space, buttons instead of a touchscreen, and a 5-inch display. That's the appeal. There's no patching and painting, no menu system to learn, and the two AA batteries come in the box. For a hallway wall where people jab at the temperature on the way past, buttons are honestly faster than a touch panel.

It's also the least expensive way into a genuinely connected Wi-Fi thermostat. It runs without a C-wire and still gives you the app, the schedule, and the voice control, and it talks to Alexa, Google Assistant, Apple HomeKit, and SmartThings, which is more ecosystems than several pricier models in this guide. Usage reports, filter reminders, and equipment alerts are all there, and the three-year warranty matches the best coverage here.

Long-term durability is the trade. Of everything in this guide, this is the model whose long-haul reliability reads worst, with a cluster of units that stop responding after a couple of years. We still recommend it, because at this price replacing one in year three costs less than buying a premium thermostat once. If you run it without a C-wire and the AC starts short-cycling afterward, connecting that spare wire is the first thing to try.

The 4.5-inch color touchscreen is the argument here. It puts indoor temperature, outdoor temperature, and humidity on the wall in large type, and you can recolor the background so it doesn't fight your paint. For anyone who likes reading the house at a glance on the way to the kitchen, that's a real pleasure, and it's the detail that separates this Honeywell from the plainer displays in this guide.

The Total Connect Comfort app covers the practical side: seven-day programming, remote adjustment, and alerts and reminders that show up both on the screen and on your phone. Alexa handles voice changes, and the remote-control side is the part that works best. Wi-Fi is the softer spot, with the connection and the Alexa link the two places this one gets sticky.

We rate it for conventional systems that already have a C-wire and a household that programs at the wall rather than in an app. If the wall has only four wires, the ecobee's power adapter is the reason to go there instead. What you're paying for is the display and the familiar Honeywell app, and it sits at about the same money as the ecobee, which is a fair trade only if the on-wall readout is what you actually wanted.

The polished gold finish and the ring you turn make this the one thermostat in the guide that guests notice. The display is 60% larger than the previous generation and wakes as you walk past to show the time, the weather, or the temperature. It looks like something you chose rather than something you installed, and that is a legitimate reason to spend more.

We think the design is worth the money only if you also want the ecosystem. The learning side builds a schedule from your first weeks of adjustments and then gets out of the way, and a Nest Temperature Sensor comes in the box for the room that never matches the hallway. It works with Alexa, Siri, Google Assistant, and HomeKit, and Matter support means it keeps working with whatever hub you add later.

Check the temperature against a room thermometer in the first week; this generation has a run of units that read a couple of degrees off, and the fix is a calibration setting rather than a return. No C-wire is needed in most homes, but "most" is doing real work in that sentence, so look up your system before you fall for the finish.

A SmartSensor comes in the box with the Premium, and that's the whole pitch: put it in the bedroom or the room over the garage, tell the thermostat to average it with the hallway, and the cold room stops losing the argument. If your house has one room that's always a few degrees off, this is the feature that fixes it.

The extras are the part you're paying for. There's an air quality readout on the screen, Alexa and Siri built into the unit so you can talk to it without a speaker nearby, and a live view of an ecobee doorbell if you own one. The Power Extender Kit and trim plate are in the box, compatibility runs to 95% of systems, and the warranty matches the Enhanced at three years.

You pay for all of it at the register, where this is the priciest thermostat in the guide, and the extras are the reason rather than the hardware.

We put it in the also-consider tier because the value math is harder than the Enhanced's: you're buying a sensor and two microphones you may never use. Buy it for the problem room; skip it if a hallway average is good enough for your house.

Read the compatibility line before anything else: this is a single-stage, one-heat/one-cool thermostat for a conventional gas, oil, or electric furnace with central air. No heat pumps, no second stage, no dual fuel. If that describes your system, and plenty of houses fit exactly that, it's a working connected thermostat for less than any other pick here.

What you get is narrow: a 3.86-inch LCD with numbers you can read from the doorway, large up and down buttons, app control for a seven-day schedule from the couch, and a C-wire connection for steady power. The battery door lets the cells drop when it opens, so load them over the tray rather than over the carpet.

We like it for a rental, a cabin, or a second thermostat in a finished basement, the places where a premium model is silly and a plain programmable unit is a chore. The simplicity is the feature: legible display, obvious buttons, nobody in the house needs a lesson. It can hold a degree past the set point before shutting off, which is the kind of swing you live with at this end of the market.