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Motion Sensors · Head to head

Shelly Blu Motion vs Sonoff SNZB-03P ZigBee Motion Sensor

Full Smart Motion Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Shelly and Sonoff sites.
2026 verdict
Among budget smart motion sensors, the Sonoff SNZB-03P ZigBee Motion Sensor edges the Shelly Blu Motion on platform reach and value.
Sonoff SNZB-03P ZigBee Motion Sensor
Winner
Sonoff SNZB-03P ZigBee Motion Sensor
$16.50
Buy on Amazon USACheck price
It works with Alexa, Google Home, SmartThings and Home Assistant, reaches Apple Home and Matter through a SONOFF hub, keeps history records and is rated for about 3 years on one CR2477 cell. The Shelly Blu Motion reaches further, 9 m against 6 m, reads light levels where the Sonoff only reports dim or bright, and lets you tune motion sensitivity, but it is a Bluetooth sensor that needs another Shelly device to reach Wi-Fi, and it has no Apple Home or Matter path. Both are compact indoor sensors that work well with Home Assistant. Pick the Sonoff SNZB-03P ZigBee Motion Sensor for a Zigbee home, and the Shelly Blu Motion if your house already runs Shelly relays.
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FeatureShelly Blu MotionSonoff SNZB-03P ZigBee Motion SensorWinner
Price$25.99$16.50Sonoff SNZB-03P ZigBee Motion Sensor
Rating4.04.2Sonoff SNZB-03P ZigBee Motion Sensor
IntegrationsGoogle Home, Alexa, Samsung SmartThings, Home AssistantGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterSonoff SNZB-03P ZigBee Motion Sensor
Range of Detection9m / 30ft6m / 20ftShelly Blu Motion
ConnectivityBluetoothZigbeeTie
SensorsMotion, LightMotion, LightTie
AlertsMotion AlertsMotion Alerts, Low Battery AlertsTie

What the differences mean

Radio

The Sonoff SNZB-03P ZigBee Motion Sensor is Zigbee and joins any compatible Zigbee hub. The Shelly Blu Motion is Bluetooth and relies on another Shelly device, or a Shelly gateway, to reach Wi-Fi. What you already own decides which is simpler.

Platforms

The Sonoff works with Alexa, Google Home, SmartThings and Home Assistant, and with Apple Home and Matter through a SONOFF hub. The Shelly Blu Motion works with Alexa, Google Home and Home Assistant, reaches SmartThings through a Shelly gateway and has no Apple Home or Matter support.

Light sensing

The Shelly Blu Motion reads light levels, which lets you set the exact darkness that turns lights on. The Sonoff SNZB-03P ZigBee Motion Sensor only reports light partially, as dim or bright.

Range

The Shelly Blu Motion is rated to 9 m and the Sonoff to 6 m over 110 degrees. In a large living room the Shelly covers more floor; in a bathroom or pantry the gap does not matter.

Settings and history

The Shelly Blu Motion lets you adjust sensitivity; the Sonoff does not, though it lets you set the no-motion timeout and keeps history records in its app.

Which one to buy if

What owners say

Owners of both sensors praise fast detection, a compact body and easy pairing with Home Assistant, and both groups buy several at a time for their value. Shelly Blu Motion owners single out that it ships powered on and appears in Home Assistant by itself, plus sensitivity levels with a pet filter, and they warn that it needs another Shelly as a Bluetooth bridge, performs poorly outdoors, only updates its light value on motion and comes with thin instructions and weak adhesive. Sonoff SNZB-03P ZigBee Motion Sensor owners single out pairing with almost any Zigbee hub and a magnetic mount, and they complain that the light sensor only says dim or bright, that the motion entity can get stuck in Home Assistant and that some units drop off the network.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Shelly Blu Motion
  • Sonoff SNZB-03P ZigBee Motion Sensor

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Frequently Asked Questions

Which is better: Shelly Blu Motion or Sonoff SNZB-03P ZigBee Motion Sensor?

The Sonoff SNZB-03P ZigBee Motion Sensor, for most homes. It works with Alexa, Google Home, SmartThings and Home Assistant, reaches Apple Home and Matter through a SONOFF hub and is rated for about 3 years per battery. The Shelly Blu Motion reaches further and reads light levels, but needs another Shelly device to connect.

What is the biggest difference between the Shelly Blu Motion and the Sonoff SNZB-03P ZigBee Motion Sensor?

The radio. The Shelly Blu Motion is Bluetooth and uses another Shelly device as its bridge, while the Sonoff SNZB-03P ZigBee Motion Sensor is Zigbee and pairs with any Zigbee hub.

Do the Shelly Blu Motion and the Sonoff SNZB-03P ZigBee Motion Sensor work with Home Assistant?

Both do. The Sonoff SNZB-03P ZigBee Motion Sensor pairs through a Zigbee coordinator, and the Shelly Blu Motion is picked up through a nearby Shelly device acting as its Bluetooth bridge.

Which has the better light sensor?

The Shelly Blu Motion, which reads light levels. The Sonoff SNZB-03P ZigBee Motion Sensor only reports whether the room is dim or bright.

Who should buy the Shelly Blu Motion?

Shelly households, especially Home Assistant users, who want a tiny indoor sensor with a long 9 m reach and adjustable sensitivity.

Who should buy the Sonoff SNZB-03P ZigBee Motion Sensor?

Zigbee hub owners who want a low-cost sensor with long battery life that works with Alexa, Google Home, SmartThings and Home Assistant.

Full comparison table

Compare all 28 Motion Sensors side by side

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