Updated October 2026
Data from Amazon and official Nabu Casa and Sonoff sites.
2026 verdict
Worried the radio is stuck in the wrong room?
The Sonoff Dongle Max handles it better than the Nabu Casa Home Assistant Connect ZBT-2, because it can sit on Ethernet or PoE instead of a USB port. It also brings a higher +20 dBm transmit power on two external antennas against +10 dBm on one, works as a Zigbee router as well as a coordinator, and doubles as a Wi-Fi access point, though its simultaneous Zigbee and Thread mode is still marked experimental. The Nabu Casa Home Assistant Connect ZBT-2 answers with official Home Assistant support and a genuinely plug-and-play setup, a tidy design and a strong owner record, but it is USB-only and runs Zigbee or Thread rather than both at once. Pick the Sonoff Dongle Max for flexible placement and range, and the Nabu Casa Home Assistant Connect ZBT-2 for the most frictionless official experience.
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| Feature | Nabu Casa Home Assistant Connect ZBT-2 | Sonoff Dongle Max | Winner |
|---|---|---|---|
| Price | $65.00 | €32.13 | Sonoff Dongle Max |
| Rating | 4.7 | 4.3 | Nabu Casa Home Assistant Connect ZBT-2 |
| Power | USB | USB, PoE | Sonoff Dongle Max |
| Connectivity | USB | USB, Ethernet, 2.4 GHz WiFi | Sonoff Dongle Max |
| Zigbee Router | NO | YES | Sonoff Dongle Max |
| Transmit Power | +10dBm | +20dBm | Sonoff Dongle Max |
| Antenna Gain | +4.16dBi | +5dBi | Sonoff Dongle Max |
| Warranty | 1 year | 1 year | Tie |
| Zigbee Chip Model | EFR32MG24 | EFR32MG24 | Tie |
| Z-Wave Controller | NO | NO | Tie |
| Thread Border Router | YES | YES | Tie |
| Matter Bridge | NO | NO | Tie |
What the differences mean
Placement
The Sonoff Dongle Max connects over USB, Ethernet or PoE, so it can be mounted where the signal is weakest. The Nabu Casa Home Assistant Connect ZBT-2 is USB-only, which ties it to the host and is the difference when a far room or an outbuilding needs coverage.
Transmit power and antennas
The Sonoff Dongle Max puts +20 dBm through two external antennas; the Nabu Casa Home Assistant Connect ZBT-2 runs +10 dBm through one. In a large home or through thick walls that gap shows up as fewer dropped devices.
Router role
The Sonoff Dongle Max works as a Zigbee router as well as a coordinator. The Nabu Casa Home Assistant Connect ZBT-2 is a coordinator only, so it cannot also act as a repeating node in the mesh.
Simultaneous protocols
The Nabu Casa Home Assistant Connect ZBT-2 runs Zigbee or Thread, chosen per use. The Sonoff Dongle Max can run both at once, but the manufacturer still labels that dual-network mode experimental, so it is not a feature to build critical automations on yet.
Official support and extras
The Nabu Casa Home Assistant Connect ZBT-2 is first-party hardware, recognized automatically by Home Assistant. The Sonoff Dongle Max is not, but it adds a Wi-Fi access point and a lower price for the extra connectivity.
Which one to buy if
- the radio has to reach a far room or an outbuilding
The Sonoff Dongle Max can sit on Ethernet or PoE, so it goes where the Zigbee signal is weak instead of staying beside the server.
- you want the most effortless official setup
The Nabu Casa Home Assistant Connect ZBT-2 is recognized automatically by Home Assistant, and setup with Home Assistant Green is essentially plug-and-play.
- you run Zigbee and Thread devices together
The Sonoff Dongle Max can run both protocols at once, though that mode is still experimental, where the Nabu Casa stick runs one at a time.
- you want a coordinator that also extends the mesh
The Sonoff Dongle Max doubles as a Zigbee router, which the Nabu Casa Home Assistant Connect ZBT-2 does not.
- + Rating: 4.7
- - Price: $65.00 vs €32.13
- - Power: USB vs USB, PoE
Winner
18% OFF
Prime exclusive deal€32.13
€38.99
- + Price: €32.13
- + Power: USB, PoE
- + Connectivity: USB, Ethernet, 2.4 GHz WiFi
- - Rating: 4.3 vs 4.7
What owners say
Both camps start from the same place: a radio that just works with Home Assistant and needs almost no tinkering. Nabu Casa Home Assistant Connect ZBT-2 owners single out the automatic setup, especially on Home Assistant Green, whole-home range from the external antenna, and switching the stick between Zigbee and Thread, with their warnings about the premium over cheaper dongles, the one-protocol-at-a-time limit, and Thread setup that can be fiddly. Sonoff Dongle Max owners talk most about placement, using Ethernet or PoE to reach a garage or a far corner where a USB stick fell short, and about smooth integration with Home Assistant, ZHA and Zigbee2MQTT. Their complaints are documentation and polish: a firmware update that needs a physical power cycle, a web portal that keeps asking for a login, and the experimental dual-network mode.
Price history compared
Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.
- Nabu Casa Home Assistant Connect ZBT-2
- Sonoff Dongle Max
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Frequently Asked Questions
Which is better overall: Nabu Casa Home Assistant Connect ZBT-2 or Sonoff Dongle Max?
The Sonoff Dongle Max wins on flexibility and reach: USB, Ethernet or PoE placement, two antennas at +20 dBm, a router role and a Wi-Fi access point. The Nabu Casa Home Assistant Connect ZBT-2 is the more polished official option, with automatic Home Assistant setup and a strong owner record, but it is USB-only and runs one protocol at a time.
What is the biggest difference between the Nabu Casa Home Assistant Connect ZBT-2 and the Sonoff Dongle Max?
Where the radio can live. The Sonoff Dongle Max connects over USB, Ethernet or PoE, so it can move away from the server, while the Nabu Casa Home Assistant Connect ZBT-2 is USB-only. That plus the higher +20 dBm transmit power on the Sonoff is what makes it the stronger choice for large homes.
Do the Nabu Casa Home Assistant Connect ZBT-2 and the Sonoff Dongle Max both work with Home Assistant?
Yes. The Nabu Casa Home Assistant Connect ZBT-2 is official Home Assistant hardware and is recognized automatically, and the Sonoff Dongle Max integrates with Home Assistant, ZHA and Zigbee2MQTT. The Sonoff also carries a Wi-Fi access point the Nabu Casa stick does not.
Can the Sonoff Dongle Max run Zigbee and Thread at the same time?
It can, but the manufacturer marks that dual-network mode as experimental rather than fully stable, so it should not be relied on for critical automations. The Nabu Casa Home Assistant Connect ZBT-2 runs Zigbee or Thread, one at a time, without that caveat.
Who should buy the Sonoff Dongle Max?
Homes where the Zigbee radio needs to move away from the server to cover a far room or an outbuilding, and buyers who want Ethernet or PoE placement, two antennas and a Wi-Fi access point at a lower price.
Who should buy the Nabu Casa Home Assistant Connect ZBT-2?
Home Assistant users who value first-party support and automatic setup, own Home Assistant Green or Yellow hardware, and only need Zigbee or Thread one at a time from a USB dongle.
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