Winner
Updated January 2026
Data from Amazon and official Bosch and Sonoff sites.
2026 verdict
For 2026, Bosch Smart radiator thermostat II [+M] is the stronger overall choice. It has the clearer edge on rating, connectivity, and integrations, and it stays ahead on its broader overall balance. Pick Sonoff Zigbee Thermostatic Radiator Valve only when price is the deciding factor for your setup. For the average buyer, Bosch Smart radiator thermostat II [+M] is the safer choice.
| Feature | Bosch Smart radiator thermostat II [+M] | Sonoff Zigbee Thermostatic Radiator Valve | Winner |
|---|---|---|---|
| Price | €70.47 | $39.99 | Sonoff Zigbee Thermostatic Radiator Valve |
| Rating | 4.2 | 4.1 | Bosch Smart radiator thermostat II [+M] |
| Connectivity | Zigbee, Thread Protocol | Zigbee | Bosch Smart radiator thermostat II [+M] |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Home Assistant | Bosch Smart radiator thermostat II [+M] |
| Warranty | 1 year | 1 year | Tie |
| Screen | YES | YES | Tie |
| Sensors | Temperature | Temperature | Tie |
| Geofencing | NO | NO | Tie |
| Frost Protection | YES | YES | Tie |
| Child Lock | YES | YES | Tie |
Winner
17% OFF
€84.95
€70.47
- + Rating: 4.2
- + Connectivity: Zigbee, Thread Protocol
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: €70.47 vs $39.99
$39.99
- + Price: $39.99
- - Rating: 4.1 vs 4.2
- - Connectivity: Zigbee vs Zigbee, Thread Protocol
Frequently Asked Questions (FAQ)
- Which is better overall: Bosch Smart radiator thermostat II [+M] or Sonoff Zigbee Thermostatic Radiator Valve?
- Bosch Smart radiator thermostat II [+M] has the stronger overall profile in this comparison, especially for rating, connectivity, and integrations.
- What is the biggest difference between Bosch Smart radiator thermostat II [+M] and Sonoff Zigbee Thermostatic Radiator Valve?
- Price is one of the clearest differences: Bosch Smart radiator thermostat II [+M] lists €70.47, while Sonoff Zigbee Thermostatic Radiator Valve lists $39.99.
- Which one looks better on price?
- Bosch Smart radiator thermostat II [+M] is listed at €70.47, while Sonoff Zigbee Thermostatic Radiator Valve is listed at $39.99. Sonoff Zigbee Thermostatic Radiator Valve (better spec).
- Who should buy Bosch Smart radiator thermostat II [+M]?
- Choose Bosch Smart radiator thermostat II [+M] if your priority is rating and connectivity and that matters more than price.
- Who should buy Sonoff Zigbee Thermostatic Radiator Valve?
- Choose Sonoff Zigbee Thermostatic Radiator Valve if your priority is price and that matters more than rating.
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