Arlo All-in-One Sensor vs Shelly Blu Motion

Connectivity and integrations tip this one to the Shelly Blu Motion over the Arlo All-in-One Sensor, even though Arlo answers back with a lower price, a higher owner rating and a sensor set that adds ambient light and temperature to plain motion detection. The Shelly Blu Motion reaches Google Home, Alexa and Home Assistant through Bluetooth LE once paired with another Shelly device or a BLU Gateway, a wider net than the Arlo All-in-One Sensor manages with just Google Home and Alexa, since Arlo has no Wi-Fi, Bluetooth, Zigbee, Z-Wave or Thread radio of its own and instead needs a compatible Arlo Security System hub or keypad just to detect motion. Both sensors, in other words, are dependent on a bridge, Shelly leans on another Shelly device, Arlo leans on its own hub, so neither is a true drop-in-anywhere sensor. The Shelly Blu Motion also detects a bit farther on paper and adds a lux sensor of its own, though without Arlo's temperature reading. Pick the Shelly Blu Motion if you already run Shelly hardware or Home Assistant and want fast, configurable detection; pick the Arlo All-in-One Sensor if you want the lowest price and a single device that also reports light and temperature.