Nabu Casa Home Assistant Connect ZBT-2 vs Smlight SLZB Ultima

Data from Amazon and official Nabu Casa and Smlight sites.

2026 verdict

Looking at the full picture in 2026, Smlight SLZB Ultima gets the edge. Its biggest wins come from connectivity, zigbee router, and z-wave controller, and dual network and bluetooth proxy adds more confidence to the verdict. You should still consider Nabu Casa Home Assistant Connect ZBT-2 if its specific feature mix matters more than raw overall balance. That is enough to make Smlight SLZB Ultima the better pick for most buyers.

Nabu Casa

Nabu Casa Home Assistant Connect ZBT-2

$65.00

BUY NOW

Winner

Smlight

Smlight SLZB Ultima

Price unavailable right now

BUY NOW

Feature	Nabu Casa Home Assistant Connect ZBT-2	Smlight SLZB Ultima	Winner
Connectivity	USB	USB, Ethernet, 2.4 GHz Wifi	Smlight SLZB Ultima
Zigbee Router	NO	YES	Smlight SLZB Ultima
Z-Wave Controller	NO	YES	Smlight SLZB Ultima
Dual Network	NO	YES	Smlight SLZB Ultima
Bluetooth Proxy	NO	YES	Smlight SLZB Ultima
Zigbee Chip Model	EFR32MG24	EFR32MGXX / CC26XXPX	Different strengths
Warranty	1 year	1 year	Tie
Power	USB	PoE	Tie
Thread Border Router	YES	YES	Tie
Matter Bridge	NO	NO	Tie

Nabu Casa

Nabu Casa Home Assistant Connect ZBT-2

$65.00

BUY NOW

- Connectivity: USB vs USB, Ethernet, 2.4 GHz Wifi
- Zigbee Router: NO vs YES

Winner

Smlight

Smlight SLZB Ultima

Price unavailable right now

BUY NOW

+ Connectivity: USB, Ethernet, 2.4 GHz Wifi
+ Zigbee Router: YES
+ Z-Wave Controller: YES

Frequently Asked Questions (FAQ)

Which is better overall: Nabu Casa Home Assistant Connect ZBT-2 or Smlight SLZB Ultima?: Smlight SLZB Ultima has the stronger overall profile in this comparison, especially for connectivity, zigbee router, and z-wave controller.
What is the biggest difference between Nabu Casa Home Assistant Connect ZBT-2 and Smlight SLZB Ultima?: Connectivity is one of the clearest differences: Nabu Casa Home Assistant Connect ZBT-2 lists USB, while Smlight SLZB Ultima lists USB, Ethernet, 2.4 GHz Wifi.
Who should buy Nabu Casa Home Assistant Connect ZBT-2?: Choose Nabu Casa Home Assistant Connect ZBT-2 if your priority is its specific strengths and that matters more than connectivity.
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.

More Dongles

Top Dongles to compare next

Compare smart dongles by supported protocols, connectivity, hardware specs, integrations, automations, and compatibility with platforms like Matter, Zigbee, and Thread.

Compare Dongles