Best mmWave presence sensors for smart homes

Top pick: Aqara Presence Sensor FP2. It's the one most people should start with: a 60GHz radar sensor that tracks presence across a whole room (not just motion), handles multiple zones so lights can follow you around, and it's the best-supported option for HomeKit, Alexa, Google and Home Assistant setups.

Who the others suit:

• Aqara FP300 — if you want a battery-friendly PIR + mmWave hybrid that's easy to place anywhere, with Alexa and Siri support.
• SwitchBot mmWave Presence Sensor — if you're already in the SwitchBot ecosystem and want a simple, cheap room sensor.
• Aqara FP1 — if you're on Zigbee with a hub and want a wall-mounted radar sensor for a single area.
• LD2450 module — for DIYers building their own sensor with ESPHome or Home Assistant; it's a bare radar board, not a finished product.
• Toyanc / Tuya-based sensors — budget picks for a single room, but expect fiddlier setup and less polish.

Avoid the unbranded Tuya listings if reliability matters; they're the cheapest way in but the least predictable.