Updated June 2026
Data from Amazon and official Nabu Casa and Sonoff sites.
2026 verdict
Sonoff Dongle Lite MG21 wins the 2026 matchup against Nabu Casa Home Assistant Connect ZBT-2, mainly on price, zigbee router, and amplifier gain. It has the clearer edge on price, zigbee router, and amplifier gain, and it stays ahead on its broader overall balance. Nabu Casa Home Assistant Connect ZBT-2 is still relevant if you care most about rating and antenna gain, but Sonoff Dongle Lite MG21 is the stronger recommendation overall. That makes Sonoff Dongle Lite MG21 the clearer recommendation in 2026.
| Feature | Nabu Casa Home Assistant Connect ZBT-2 | Sonoff Dongle Lite MG21 | Winner |
|---|---|---|---|
| Price | $65.00 | $19.90 | Sonoff Dongle Lite MG21 |
| Rating | 4.8 | 4.6 | Nabu Casa Home Assistant Connect ZBT-2 |
| Zigbee Router | NO | YES | Sonoff Dongle Lite MG21 |
| Amplifier Gain | 10 dBm | +20 dBm | Sonoff Dongle Lite MG21 |
| Antenna Gain | +4.16dBi | +3dBi | Nabu Casa Home Assistant Connect ZBT-2 |
| Zigbee Chip Model | EFR32MG24 | EFR32MG21 | Different strengths |
| Warranty | 1 year | 1 year | Tie |
| Power | USB | USB | Tie |
| Connectivity | USB | USB | Tie |
| Z-Wave Controller | NO | NO | Tie |
| Thread Border Router | YES | YES | Tie |
| Matter Bridge | NO | NO | Tie |
$65.00
- + Rating: 4.8
- + Antenna Gain: +4.16dBi
- - Price: $65.00 vs $19.90
- - Zigbee Router: NO vs YES
Winner
$19.90
- + Price: $19.90
- + Zigbee Router: YES
- + Amplifier Gain: +20 dBm
- - Rating: 4.6 vs 4.8
- - Antenna Gain: +3dBi vs +4.16dBi
Frequently Asked Questions
Which is better overall: Nabu Casa Home Assistant Connect ZBT-2 or Sonoff Dongle Lite MG21?
Sonoff Dongle Lite MG21 has the stronger overall profile in this comparison, especially for price, zigbee router, and amplifier gain.
What is the biggest difference between Nabu Casa Home Assistant Connect ZBT-2 and Sonoff Dongle Lite MG21?
Price is one of the clearest differences: Nabu Casa Home Assistant Connect ZBT-2 lists $65.00, while Sonoff Dongle Lite MG21 lists $19.90.
Which one looks better on price?
Nabu Casa Home Assistant Connect ZBT-2 is listed at $65.00, while Sonoff Dongle Lite MG21 is listed at $19.90. Sonoff Dongle Lite MG21 (better spec).
Who should buy Nabu Casa Home Assistant Connect ZBT-2?
Choose Nabu Casa Home Assistant Connect ZBT-2 if your priority is rating and antenna gain and that matters more than price.
Who should buy Sonoff Dongle Lite MG21?
Choose Sonoff Dongle Lite MG21 if your priority is price and zigbee router and that matters more than rating.
SmlightSLZB-06 MG24
$85.99
SmlightSLZB-MR4
€150.00- Nabu Casa
Home Assistant Connect ZBT-2
$65.00 
SmlightSLZB-07
$34.99
SmlightSLZB-07p7
$36.99
SmlightSLZB-MR3
$105.99
SonoffZBDongle-E
$26.99
ZoozZ-Wave Long Range Stick
$39.95
Nabu CasaHome Assistant Connect ZWA-2
$79.00
SonoffDongle Plus MG24
$35.90
SonoffDongle Lite MG21
$19.90
SonoffDongle-PZG23
$39.90
SmlightSLZB-06M
$75.99
SonoffZBDongle-P
$39.99
AeotecZ-Stick 7
$39.99
SmlightSLZB-07 MG26
SmlightSLZB-MR2
$102.99
SonoffDongle Max
€45.02
SmlightSLZB-06
$74.99
AeotecZ-Stick 10 Pro
$59.99
CamerasSonoffCam Slim Gen2
$19.90
CamerasSonoffGK-200MP2-B
30% OFF$9.99$6.99
DisplaysSonoffNSPanel Pro
$129.90- DonglesSonoff
Dongle Lite MG21
$19.90 - DonglesSonoff
Dongle Max
€45.02 - DonglesSonoff
Dongle Plus MG24
$35.90 - DonglesSonoff
Dongle-PZG23
$39.90 - DonglesSonoff
ZBDongle-E
$26.99 - DonglesSonoff
ZBDongle-P
$39.99 
Door & Window SensorsSonoffDW2-WIFI
$12.23
Door & Window SensorsSonoffSNZB-04 ZigBee Wireless Door/Window Sensor
$17.99
Door & Window SensorsSonoffSNZB-04P ZigBee Door/Window Sensor
$18.99
Door & Window SensorsSonoffSenseGuard DW Gen2
€40.91
HubsSonoffiHost
$89.99
HubsSonoffZigbee Bridge Pro
$24.90
HubsSonoffZigbee Bridge Ultra
$54.99
LED BulbsSonoffWi-Fi Smart LED Bulb - Warm & Cold
$8.90
LED BulbsSonoffWi-Fi Smart LED Bulb - Color - A19
$13.92
LED BulbsSonoffWi-Fi Smart LED Bulb - Color - A60
€23.99
Motion SensorsSonoffSNZB-03 ZigBee Motion Sensor
5% OFF$18.99$18.04