Updated October 2026
Data from Amazon and official Sonoff site.
2026 verdict
In a larger home where the USB port beside the server is the wrong place for the radio, the Sonoff Dongle Max is the better Sonoff coordinator, since it also runs over Ethernet, PoE and Wi-Fi.
It moves up to the Silicon Labs EFR32MG24 chip with two +5 dBi antennas, and it offers a dual network mode for Zigbee and Thread at once, still marked experimental. The Sonoff Dongle Lite MG21 keeps things simple: a light USB stick on the EFR32MG21 with one antenna, an extension cable in the box and the better owner reception, at a much lower price. Both are Zigbee 3.0 coordinators and routers, can act as a Thread border router, and work with ZHA and Zigbee2MQTT. Choose the Sonoff Dongle Lite MG21 for a small home or a first coordinator, and the Sonoff Dongle Max when placement and Thread matter.
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| Feature | Sonoff Dongle Lite MG21 | Sonoff Dongle Max | Winner |
|---|---|---|---|
| Price | $24.90 | €32.13 | Sonoff Dongle Lite MG21 |
| Rating | 4.5 | 4.3 | Sonoff Dongle Lite MG21 |
| Power | USB | USB, PoE | Sonoff Dongle Max |
| Connectivity | USB | USB, Ethernet, 2.4 GHz WiFi | Sonoff Dongle Max |
| Antenna Gain | +2dBi | +5dBi | Sonoff Dongle Max |
| Zigbee Chip Model | EFR32MG21 | EFR32MG24 | Different strengths |
| Warranty | 1 year | 1 year | Tie |
| Zigbee Router | YES | YES | Tie |
| Z-Wave Controller | NO | NO | Tie |
| Thread Border Router | YES | YES | Tie |
| Matter Bridge | NO | NO | Tie |
| Transmit Power | +20dBm | +20dBm | Tie |
What the differences mean
Connection and placement
The Sonoff Dongle Max connects over Ethernet, PoE, 2.4 GHz Wi-Fi or USB, so it can sit in the middle of the house. The Sonoff Dongle Lite MG21 is USB only and stays on the host, with an extension cable to move it a short way.
MG21 vs MG24 chip
The Sonoff Dongle Lite MG21 uses the Silicon Labs EFR32MG21, the Sonoff Dongle Max the newer EFR32MG24. Both run Zigbee 3.0 and can be a Thread border router; only the Max offers running both networks together, and Sonoff still calls that experimental.
Antennas
The Sonoff Dongle Max has two external antennas rated +5 dBi, against one 2 dBi antenna on the Sonoff Dongle Lite MG21. Combined with central placement, that is where the Max's extra reach comes from.
Size
The Sonoff Dongle Lite MG21 weighs 8.8 g. The Sonoff Dongle Max is a 169 mm box weighing 102 g, closer to a small network appliance than a stick.
Which one to buy if
- this is your first Zigbee coordinator for a small home
The Sonoff Dongle Lite MG21 is the cheap, well reviewed way in, and it handles dozens of devices.
- your devices are spread across a big house or a garage
PoE and Ethernet let the Sonoff Dongle Max sit where coverage is weakest.
- you want Zigbee and Thread on one device
Only the Sonoff Dongle Max offers dual network mode, although it is still experimental.
- you want extra units to extend the mesh as routers
Both can be routers, but the Sonoff Dongle Lite MG21 is the one priced to buy several.
- + Price: $24.90
- + Rating: 4.5
- - Power: USB vs USB, PoE
- - Connectivity: USB vs USB, Ethernet, 2.4 GHz WiFi
Winner
18% OFF
Prime exclusive deal€32.13
€38.99
- + Power: USB, PoE
- + Connectivity: USB, Ethernet, 2.4 GHz WiFi
- + Antenna Gain: +5dBi
- - Price: €32.13 vs $24.90
- - Rating: 4.3 vs 4.5
What owners say
Owners of both Sonoff coordinators describe smooth pairing through ZHA and Zigbee2MQTT and reliable Zigbee networks. Sonoff Dongle Lite MG21 owners single out value, the freedom to run spare units as routers and the included extension cable that moves the stick away from USB 3 interference, and their warnings are that flashing it for Thread takes effort and one firmware update broke OpenHAB support. Sonoff Dongle Max owners talk about placing it anywhere over PoE or Ethernet to cover dead zones, including a detached garage, while they complain about thin documentation (a firmware update needs a physical power cycle), a web portal that keeps asking for a login and, for a few, devices disconnecting on their own.
Upgrading from the Sonoff Dongle Lite MG21?
Moving from the Sonoff Dongle Lite MG21 to the Sonoff Dongle Max changes where the radio can live: Ethernet, PoE or Wi-Fi instead of a USB port on the server, with two antennas and the newer EFR32MG24 chip. It also opens the experimental dual network mode. If your Lite already reaches every device and you have no Thread plans, there is little to gain. If the server sits in a corner and devices at the far end keep dropping, the Max is the step that fixes placement.
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.
- Sonoff Dongle Lite MG21
- Sonoff Dongle Max
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Frequently Asked Questions
Which is better: Sonoff Dongle Lite MG21 or Sonoff Dongle Max?
The Sonoff Dongle Max, for its Ethernet, PoE and Wi-Fi connections, two +5 dBi antennas, newer EFR32MG24 chip and experimental dual network mode. The Sonoff Dongle Lite MG21 is far cheaper and better reviewed, and is enough for a small or medium Zigbee network.
Sonoff MG21 vs MG24: what is the difference?
The Sonoff Dongle Lite MG21 runs the Silicon Labs EFR32MG21 and the Sonoff Dongle Max the newer EFR32MG24. Both handle Zigbee 3.0 and Thread border router duty; the MG24-based Max adds the option of running Zigbee and Thread together in experimental dual network mode.
Can the Sonoff Dongle Lite MG21 run Thread?
Yes, it can act as a Thread border router, but it ships set up for Zigbee and must be flashed first, which owners say can take effort. It runs one protocol at a time.
Does the Sonoff Dongle Max support PoE?
Yes. The Sonoff Dongle Max can be powered and connected over PoE, or use Ethernet, 2.4 GHz Wi-Fi or USB. The Sonoff Dongle Lite MG21 is USB only.
Who should buy the Sonoff Dongle Lite MG21?
Budget buyers and first-time Home Assistant users building a Zigbee network with ZHA or Zigbee2MQTT, with the host close to the devices.
Who should buy the Sonoff Dongle Max?
Hobbyists with a larger home who want the coordinator placed centrally over PoE or Ethernet, and who are comfortable with a web interface and firmware steps.
Full comparison table
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