Data from Amazon and official Nabu Casa and Smlight sites.
2026 verdict
Across the 2026 comparison, Smlight SLZB Ultima earns the nod over Nabu Casa Home Assistant Connect ZWA-2 on the strength of power, connectivity, and zigbee router. Its strongest advantages show up in power, connectivity, and zigbee router, with thread border router and dual network helping widen the gap. Choose Nabu Casa Home Assistant Connect ZWA-2 only if price and rating matter more to you than the broader advantage from Smlight SLZB Ultima. Overall, Smlight SLZB Ultima makes more sense for most people.
| Feature | Nabu Casa Home Assistant Connect ZWA-2 | Smlight SLZB Ultima | Winner |
|---|---|---|---|
| Price | $79.00 | $95.99 | Nabu Casa Home Assistant Connect ZWA-2 |
| Rating | 4.5 | 2.0 | Nabu Casa Home Assistant Connect ZWA-2 |
| Power | USB | USB, PoE | Smlight SLZB Ultima |
| Connectivity | USB | USB, Ethernet, 2.4 GHz WiFi | Smlight SLZB Ultima |
| Zigbee Router | NO | YES | Smlight SLZB Ultima |
| Thread Border Router | NO | YES | Smlight SLZB Ultima |
| Dual Network | NO | YES | Smlight SLZB Ultima |
| Bluetooth Proxy | NO | YES | Smlight SLZB Ultima |
| Warranty | 1 year | 1 year | Tie |
| Z-Wave Controller | YES | YES | Tie |
| Matter Bridge | NO | NO | Tie |
$79.00
- + Price: $79.00
- + Rating: 4.5
- - Power: USB vs USB, PoE
- - Connectivity: USB vs USB, Ethernet, 2.4 GHz WiFi
Winner
$95.99
- + Power: USB, PoE
- + Connectivity: USB, Ethernet, 2.4 GHz WiFi
- + Zigbee Router: YES
- - Price: $95.99 vs $79.00
- - Rating: 2.0 vs 4.5
Frequently Asked Questions
Which is better overall: Nabu Casa Home Assistant Connect ZWA-2 or Smlight SLZB Ultima?
Smlight SLZB Ultima has the stronger overall profile in this comparison, especially for power, connectivity, and zigbee router.
What is the biggest difference between Nabu Casa Home Assistant Connect ZWA-2 and Smlight SLZB Ultima?
Price is one of the clearest differences: Nabu Casa Home Assistant Connect ZWA-2 lists $79.00, while Smlight SLZB Ultima lists $95.99.
Which one looks better on price?
Nabu Casa Home Assistant Connect ZWA-2 is listed at $79.00, while Smlight SLZB Ultima is listed at $95.99. Nabu Casa Home Assistant Connect ZWA-2 (better spec).
Who should buy Nabu Casa Home Assistant Connect ZWA-2?
Choose Nabu Casa Home Assistant Connect ZWA-2 if your priority is price and rating and that matters more than power.
Who should buy Smlight SLZB Ultima?
Choose Smlight SLZB Ultima if your priority is power and connectivity and that matters more than price.
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