Sonoff MINI Dry Wi-Fi Smart Switch is the top pick among smart relays under $20, rated 4.7 stars across 1,045 customer reviews.
SonoffMINI Dry Wi-Fi Smart Switch
4.7(1,045)$14.90
ShellyShelly 1 Mini Gen3
4.5(4,835)$17.99
SonoffZBMINIR2 Extreme Zigbee Smart Switch
4.6(1,434)$12.90
ShellyPM Mini Gen3
4.6(1,385)$14.49
SonoffZBMINI-L2 Extreme Zigbee Smart Switch
4.4(588)$19.90
SonoffBasic DIN Rail Matter Over WiFi Smart Switch
4.6(312)$19.90
SonoffZBMINI ZigBee Smart Switch
4.1(853)$17.99
SonoffMINI Duo 2
4.5(293)$17.90
SonoffBasic DIN Rail Zigbee Smart Switch
4.6(147)$19.90
SonoffMINI Dry Zigbee Smart Switch
4.3(192)$14.90- Deals by email
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ShellyShelly i4 Gen3
4.4(145)$19.99
SonoffMINI ONE PM Zigbee Smart Switch
4.6(90)$19.90
SwitchBotRelay Switch 1
4.4(100)$11.74
SonoffMINI ONE Zigbee Smart Switch
4.8(59)$17.90
SonoffMINI ONE PM Matter Over WiFi Smart Switch
5.0(2)$19.90
SonoffBasic Gen5 Matter Over WiFi Smart Switch
$5.99
MoesSmart Light Switch Module No Neutral
$13.99
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Frequently asked questions
What are the best smart relays under $20?
Sonoff MINI Dry Wi-Fi Smart Switch, Shelly 1 Mini Gen3 and Sonoff ZBMINIR2 Extreme Zigbee Smart Switch lead our ranking of smart relays under $20, ordered by customer rating weighted by how many reviews back it. The full list compares 17 products in this price range.
How many smart relays cost less than $20?
This page tracks 17 smart relays under $20 from 4 brands, with prices starting at $5.99.
Are these prices up to date?
Prices come from each product's Amazon listing and are re-checked continuously, so every card shows the latest price we have. A product whose price rises above $20 drops off this list on the next update.
Looking for more than $20?
See all the relays in the catalog, compared side by side on specs, price and rating.