Smlight SLZB Ultima vs Sonoff Dongle-PZG23

Full Smart Dongles comparison in 2026

Updated April 2026
Data from Amazon and official Smlight and Sonoff sites.
2026 verdict
In 2026, Smlight SLZB Ultima stands out as the more complete option. Its biggest wins come from connectivity, zigbee router, and thread border router, and dual network and bluetooth proxy adds more confidence to the verdict. Sonoff Dongle-PZG23 is the better fit only for buyers who prioritize its specific feature mix above everything else here. Overall, Smlight SLZB Ultima makes more sense for most people.
vs
FeatureSmlight SLZB UltimaSonoff Dongle-PZG23Winner
ConnectivityUSB, Ethernet, 2.4 GHz WifiUSBSmlight SLZB Ultima
Zigbee RouterYESNOSmlight SLZB Ultima
Thread Border RouterYESNOSmlight SLZB Ultima
Dual NetworkYESNOSmlight SLZB Ultima
Bluetooth ProxyYESNOSmlight SLZB Ultima
Warranty1 year1 yearTie
PowerPoEUSBTie
Z-Wave ControllerYESYESTie
Matter BridgeNONOTie

Frequently Asked Questions (FAQ)

Which is better overall: Smlight SLZB Ultima or Sonoff Dongle-PZG23?
Smlight SLZB Ultima has the stronger overall profile in this comparison, especially for connectivity, zigbee router, and thread border router.
What is the biggest difference between Smlight SLZB Ultima and Sonoff Dongle-PZG23?
Connectivity is one of the clearest differences: Smlight SLZB Ultima lists USB, Ethernet, 2.4 GHz Wifi, while Sonoff Dongle-PZG23 lists USB.
Who should buy Smlight SLZB Ultima?
Choose Smlight SLZB Ultima if your priority is connectivity and zigbee router and that matters more than the competing advantages.
Who should buy Sonoff Dongle-PZG23?
Choose Sonoff Dongle-PZG23 if your priority is its specific strengths and that matters more than connectivity.
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