Updated October 2026
Data from Amazon and official Sonoff and Third Reality sites.
2026 verdict
Third Reality USBC-Dongle has the better all-around case than Sonoff Dongle Lite MG21 in 2026, starting with price and matter bridge.
It has the clearer edge on price and matter bridge, and it stays ahead on its broader overall balance. Pick Sonoff Dongle Lite MG21 only when rating is the deciding factor for your setup. That is enough to make Third Reality USBC-Dongle the better pick for most buyers.
vs
Winner
Deals by email
Dongle prices change while you decide
We follow prices across the catalog and email you the best deals we find.
No spam. Unsubscribe in one click.
| Feature | Sonoff Dongle Lite MG21 | Third Reality USBC-Dongle | Winner |
|---|---|---|---|
| Price | $24.90 | $19.99 | Third Reality USBC-Dongle |
| Rating | 4.5 | 3.1 | Sonoff Dongle Lite MG21 |
| Matter Bridge | NO | YES | Third Reality USBC-Dongle |
| 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 |
| Dual Network | NO | NO | Tie |
| Bluetooth Proxy | NO | NO | Tie |
- + Rating: 4.5
- - Price: $24.90 vs $19.99
- - Matter Bridge: NO vs YES
Winner
- + Price: $19.99
- + Matter Bridge: YES
- - Rating: 3.1 vs 4.5
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
- Third Reality USBC-Dongle
Loading price history...
Frequently Asked Questions
Which is better overall: Sonoff Dongle Lite MG21 or Third Reality USBC-Dongle?
Third Reality USBC-Dongle has the stronger overall profile in this comparison, especially for price and matter bridge.
What is the biggest difference between Sonoff Dongle Lite MG21 and Third Reality USBC-Dongle?
Price is one of the clearest differences: Sonoff Dongle Lite MG21 lists $24.90, while Third Reality USBC-Dongle lists $19.99.
Which one looks better on price?
Sonoff Dongle Lite MG21 is listed at $24.90, while Third Reality USBC-Dongle is listed at $19.99. Third Reality USBC-Dongle (better spec).
Who should buy Sonoff Dongle Lite MG21?
Choose Sonoff Dongle Lite MG21 if your priority is rating and that matters more than price.
Who should buy Third Reality USBC-Dongle?
Choose Third Reality USBC-Dongle if your priority is price and matter bridge and that matters more than rating.
Full comparison table
Compare all 36 Dongles side by side
You are looking at two of them. The full table lines up all Dongles in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 36 Dongles
- 32 specs compared
- 29 filters
SmlightSLZB-MRW10
$100.00
SmlightSLZB-06 U
$72.99
SmlightSLZB-MR3
€158.13
SmlightSLZB-MR5U
$119.99
SmlightSLZB-07
$34.99
SmlightSLZB-MR1U
$102.99
SmlightSLZB-07p7
$36.99
SonoffZBDongle-E
$24.90
SonoffDongle Plus MG24
$35.90
Nabu CasaHome Assistant Connect ZBT-2
$65.00
SonoffZBDongle-P
16% OFF$39.99$33.45
ZoozZ-Wave Long Range Stick
$39.95
Nabu CasaHome Assistant Connect ZWA-2
$79.00
SonoffDongle-PZG23
$39.90
SmlightSLZB-06M
$72.99
SonoffDongle Plus PP10
$35.90
SmlightSLZB-06p7U
$78.99
SmlightSLZB-MR2
€111.97- Sonoff
Dongle Lite MG21
$24.90 
AeotecZ-Stick 7
$39.99
Air Quality MonitorsSonoffSAWF-07P Air Quality Monitor
3.7(193)$39.90
Air Quality MonitorsSonoffSAWF-08P Air Quality Monitor
4.3(169)$49.90
CamerasSonoffCAM GlassView
4.4(30)$34.90
CamerasSonoffCam Outdoor DUO
$79.90
CamerasSonoffCam Slim Gen2
4.4(176)$19.90
CamerasSonoffGK-200MP2-B
4.0(149)30% OFF$9.99$6.99
DisplaysSonoffNSPanel Pro Gen2
3.4(11)€149.90
DisplaysSonoffNSPanel Pro
4.1(75)$129.90- DonglesSonoff
Dongle Lite MG21
4.5(452)$24.90 
DonglesSonoffDongle Max
4.3(603)18% OFF€38.99€32.13- DonglesSonoff
Dongle Plus MG24
4.7(690)$35.90 - DonglesSonoff
Dongle Plus PP10
4.6(99)$35.90 - DonglesSonoff
Dongle-PZG23
4.6(175)$39.90 
DonglesSonoffZ-Wave 800 PoE Dongle Max
4.5(26)$44.90- DonglesSonoff
ZBDongle-E
4.7(3,743)$24.90 - DonglesSonoff
ZBDongle-P
4.6(5,678)16% OFF$39.99$33.45 
Door & Window SensorsSonoffDW2-WIFI
3.8(1,057)$12.23
Door & Window SensorsSonoffSNZB-04 ZigBee Wireless Door/Window Sensor
3.7(101)$17.99
Door & Window SensorsSonoffSNZB-04P ZigBee Door/Window Sensor
4.0(13)$18.99
Door & Window SensorsSonoffSenseGuard DW Gen2
4.4(203)£35.00
Air Quality MonitorsThird RealitySmart Air Quality Sensor
$49.99- DonglesThird Reality
USBC-Dongle
3.1(72)$19.99 
Garage Door OpenersThird RealitySmart Garage Door Opener
4.2(85)$49.99
LED BulbsThird RealitySmart Color Bulb ZL2
$15.99
Presence SensorsThird RealitySmart Presence Sensor R2
3.2(12)25% OFF$39.99$29.99
Presence SensorsThird RealitySmart Presence Sensor R3
3.5(59)20% OFF$49.99$39.99
Vibration SensorsThird RealityVibration Sensor
4.1(602)$19.99
Wall OutletsThird RealitySmart Wall Outlet ZW1
3.5(13)$29.99
Water Leak SensorsThird RealitySmart Water Leak Sensor WL2
3.9(41)22% OFF$17.99$13.99
Water Leak SensorsThird RealityWater Leak Sensor
4.1(351)$20.99
Window CoveringsThird RealitySmart Blind
4.0(108)$158.99