Smlight SLZB Ultima vs Sonoff ZBDongle-P

Full Smart Dongles comparison in 2026

Updated April 2026
Data from Amazon and official Smlight and Sonoff sites.
2026 verdict
For this 2026 head-to-head, Smlight SLZB Ultima has the better all-around case. It separates itself most clearly on connectivity, z-wave controller, and thread border router, while still looking better on dual network and bluetooth proxy. There is still a case for Sonoff ZBDongle-P, but mainly if warranty is what you value most. That is why the final call still favors Smlight SLZB Ultima.
FeatureSmlight SLZB UltimaSonoff ZBDongle-PWinner
Warranty1 year2 yearsSonoff ZBDongle-P
ConnectivityUSB, Ethernet, 2.4 GHz WifiUSBSmlight SLZB Ultima
Z-Wave ControllerYESNOSmlight SLZB Ultima
Thread Border RouterYESNOSmlight SLZB Ultima
Dual NetworkYESNOSmlight SLZB Ultima
Bluetooth ProxyYESNOSmlight SLZB Ultima
Zigbee Chip ModelEFR32MGXX / CC26XXPXCC2652PDifferent strengths
PowerPoEUSBTie
Zigbee RouterYESYESTie
Matter BridgeNONOTie
Winner
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  • + Connectivity: USB, Ethernet, 2.4 GHz Wifi
  • + Z-Wave Controller: YES
  • + Thread Border Router: YES
  • - Warranty: 1 year vs 2 years

Frequently Asked Questions (FAQ)

Which is better overall: Smlight SLZB Ultima or Sonoff ZBDongle-P?
Smlight SLZB Ultima has the stronger overall profile in this comparison, especially for connectivity, z-wave controller, and thread border router.
What is the biggest difference between Smlight SLZB Ultima and Sonoff ZBDongle-P?
Warranty is one of the clearest differences: Smlight SLZB Ultima lists 1 year, while Sonoff ZBDongle-P lists 2 years.
Who should buy Smlight SLZB Ultima?
Choose Smlight SLZB Ultima if your priority is connectivity and z-wave controller and that matters more than warranty.
Who should buy Sonoff ZBDongle-P?
Choose Sonoff ZBDongle-P if your priority is warranty and that matters more than connectivity.
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