Smlight SLZB-06 vs Sonoff ZBDongle-E

The Smlight SLZB-06 is the more capable dongle, adding Ethernet, PoE and Wi-Fi placement, a stronger +5dBi antenna, a Thread border router and a Bluetooth proxy. The Sonoff ZBDongle-E is cheaper, higher-rated and comes with a 2-year warranty, so it is the value pick for a simple USB Zigbee setup.

Connectivity and scope. The SLZB-06 is a network coordinator (Ethernet, PoE, Wi-Fi and USB) that also does Thread and Bluetooth proxy, while the ZBDongle-E is a USB-only Zigbee stick with no Thread or Bluetooth proxy. Both are Zigbee 3.0 coordinators for Home Assistant; neither supports Z-Wave.

The Sonoff ZBDongle-E, at 2 years, versus 1 year on the Smlight SLZB-06. The ZBDongle-E also has one of the largest owner review bases of any Zigbee coordinator, which is part of why it is such a common first buy.

Buy the Smlight SLZB-06 if you want to place your Zigbee coordinator centrally over Ethernet or PoE for better range and stability, with Thread and Bluetooth proxy support. It is the choice when placement freedom and extra roles matter more than saving money.

Buy the Sonoff ZBDongle-E if you want the most affordable, widely-proven, plug-and-play USB Zigbee coordinator with a 2-year warranty. It ships pre-flashed, is recognized instantly by Home Assistant's ZHA, and is the go-to for replacing brand bridges like Philips Hue.