Shelly Blu Motion vs SwitchBot Motion Sensor

The SwitchBot Motion Sensor wins overall on price, a higher owner rating and broader integrations (Alexa, Google, SmartThings, IFTTT, Matter and Home Assistant via its hub). The Shelly Blu Motion is closely matched, sharing a 9m/30ft range and adding a lux sensor, and it is best inside a Shelly setup.

Ecosystem, since the two are otherwise similar Bluetooth light-plus-motion sensors with the same 9m/30ft range. The SwitchBot Motion Sensor connects to more platforms through a SwitchBot Hub, while the Shelly Blu Motion depends on another Shelly device or a BLU Gateway and works with Home Assistant, Alexa and Google.

Quite similar in the fundamentals, both are compact indoor Bluetooth sensors with a built-in light sensor, motion detection to 9m/30ft, and multi-year battery life that require a bridge. The SwitchBot Motion Sensor pulls ahead mainly on price, rating and wider integrations, while the Shelly Blu Motion offers up to about five years of battery life.

Yes, and both are indoor-only. The Shelly Blu Motion needs another Shelly device or a BLU Gateway to bridge Bluetooth to WiFi, and the SwitchBot Motion Sensor needs a SwitchBot Hub for Alexa, Google, IFTTT or Matter. Neither is weatherproof.

Buy the Shelly Blu Motion if you already run Shelly hardware, use Home Assistant, and want an ultra-compact, fast sensor with a lux sensor and up to five years of battery life. It is the natural pick inside a Shelly-based smart home.

Buy the SwitchBot Motion Sensor if you want a lower-priced, higher-rated sensor with wider platform support and a built-in light sensor, especially in a SwitchBot or Alexa home. Just note it cannot act as a Google Home automation trigger.