ecobee has spent years refining the smart thermostat, but the Smart Thermostat Premium with Doorbell Camera and SmartSensor is its most ambitious play yet. This isn’t a single device—it’s a hub that ties your climate control and front-door security into one system. The wired design means no battery anxiety, and it works with Apple HomeKit, Amazon Alexa, and Samsung SmartThings. That matters because you can check your doorbell feed from the same app where you adjust the temperature.

The thermostat itself handles up to four stages of heating and cooling, so it works with most modern HVAC systems. The built-in doorbell camera captures 1080p video with a 175-degree field of view. That’s enough to see packages left on the ground or a visitor’s full body. The included SmartSensor sits in a room you care about, like a nursery or home office, and reports temperature and occupancy back to the thermostat. This allows the system to prioritize that room over a hallway sensor. In practice, it means the baby’s room stays at 72°F while the rest of the house can fluctuate.

One honest limitation: the doorbell camera requires wired power, so it won’t work with older low-voltage setups without an adapter. And the SmartSensor uses a CR2477 battery that lasts about five years, but you’ll need to replace it yourself. The 30-day trial of ecobee Smart Security adds cloud recording and motion alerts, but the subscription is $5 per month after that. If you want a thermostat that doubles as a security camera without extra hubs, this is the cleanest way to do it.