Winner
Updated November 2026
Data from the official Shelly and Third Reality sites.
2026 verdict
Shelly Presence Gen4 is the more complete option versus Third Reality Smart Presence Sensor R2 in 2026, helped most by rating, connectivity, and integrations.
It has the clearer edge on rating, connectivity, and integrations, and it stays ahead on sensors and Multi-Person detection. Choose Third Reality Smart Presence Sensor R2 only if price matters more to you than the broader advantage from Shelly Presence Gen4. For the average buyer, Shelly Presence Gen4 is the safer choice.
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| Feature | Shelly Presence Gen4 | Third Reality Smart Presence Sensor R2 | Winner |
|---|---|---|---|
| Price | $84.99 | $39.99 | Third Reality Smart Presence Sensor R2 |
| Rating | 4.1 | 3.2 | Shelly Presence Gen4 |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Zigbee | Zigbee | Shelly Presence Gen4 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Alexa, Samsung SmartThings, Home Assistant | Shelly Presence Gen4 |
| Sensors | Presence, Light | Presence | Shelly Presence Gen4 |
| Multi-Person Detection | YES | NO | Shelly Presence Gen4 |
| Range of Detection | 8m / 26ft | 5m / 16ft | Shelly Presence Gen4 |
| Weather Resistance | NO | NO | Tie |
| Alerts | Presence Alerts | Presence Alerts | Tie |
| Local Control | YES | YES | Tie |
Winner
$84.99
- + Rating: 4.1
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: $84.99 vs $39.99
$39.99
- + Price: $39.99
- - Rating: 3.2 vs 4.1
- - Connectivity: Zigbee vs 2.4 GHz WiFi, Bluetooth, Zigbee
Frequently Asked Questions
Which is better overall: Shelly Presence Gen4 or Third Reality Smart Presence Sensor R2?
Shelly Presence Gen4 has the stronger overall profile in this comparison, especially for rating, connectivity, and integrations.
What is the biggest difference between Shelly Presence Gen4 and Third Reality Smart Presence Sensor R2?
Price is one of the clearest differences: Shelly Presence Gen4 lists $84.99, while Third Reality Smart Presence Sensor R2 lists $39.99.
Which one looks better on price?
Shelly Presence Gen4 is listed at $84.99, while Third Reality Smart Presence Sensor R2 is listed at $39.99. Third Reality Smart Presence Sensor R2 (better spec).
Who should buy Shelly Presence Gen4?
Choose Shelly Presence Gen4 if your priority is rating and connectivity and that matters more than price.
Who should buy Third Reality Smart Presence Sensor R2?
Choose Third Reality Smart Presence Sensor R2 if your priority is price and that matters more than rating.
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Compare all 17 Presence Sensors side by side
You are looking at two of them. The full table lines up all Presence Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 17 Presence Sensors
- 34 specs compared
- 31 filters
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Human Presence Detector (Ceiling Mount)
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- Buttons
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- Cameras
Camera
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Wall Display X1i
- Displays
Wall Display XL
- Displays
Wall Display
- Door & Window Sensors
BLU Door/Window Outdoor ZB
- Door & Window Sensors
BLU Door/Window ZB
- Energy Monitors
3EM-63W Gen3
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EM Gen3
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EM Gen4
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EM Mini Gen4
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Pro 3EM 3CT63
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Pro 3EM-400
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Pro 3EM v2
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Pro EM-50
- Gas Detectors
GAS (CNG)
- Gas Detectors
GAS (LPG)
- LED Bulbs
Multicolor Bulb E27 Gen3
- Motion Sensors
BLU Motion ZB
- Air Quality Monitors
Smart Air Quality Sensor
- Buttons
Smart Button ZB2
- Buttons
Smart Button
- Dongles
USBC-Dongle
- Garage Door Openers
Smart Garage Door Opener
- LED Bulbs
Smart Color Bulb ZB3
- LED Bulbs
Smart Color Bulb ZL1
- LED Bulbs
Smart Color Bulb ZL2
- Plugs
Smart Plug E3
- Presence Sensors
Smart Presence Sensor R3
- Presence Sensors
Smart Timer Light TL2
- Vibration Sensors
Vibration Sensor
- Wall Outlets
Smart Wall Outlet ZW1
- Water Leak Sensors
Smart Water Leak Sensor WL2
- Water Leak Sensors
Water Leak Sensor
- Window Coverings
Smart Blind Gen2
- Window Coverings
Smart Blind