Sonoff MINI Dry Wi-Fi Smart Switch is the top pick among smart relays under $20, rated 4.7 stars across 968 customer reviews.
SonoffMINI Dry Wi-Fi Smart Switch
4.7(968)$14.90
ShellyShelly 1 Mini Gen3
4.5(4,752)$17.99
ShellyPM Mini Gen3
4.6(1,350)$14.49
SonoffZBMINI-L2 Extreme Zigbee Smart Switch
4.3(1,294)$17.99
SonoffZBMINI ZigBee Smart Switch
4.1(851)$17.99
SonoffMINI Duo 2
4.6(262)$17.90
AqaraSingle Switch Module T1 (With Neutral)
4.5(151)$16.04
ShellyShelly i4 Gen3
4.4(125)$19.99- Price alerts
Relays under $20, updated as prices fall
We check the price of every Relay in the catalog daily, and email you the ones that drop into this range.
SwitchBotRelay Switch 1
4.4(99)10% OFF$12.99$11.74
SonoffMINI ONE PM Zigbee Smart Switch
4.6(66)$19.90
MoesSmart Light Switch Module No Neutral
$13.99
SonoffMINI ONE Zigbee Smart Switch
$17.90
SonoffMINI ONE PM Matter Over WiFi Smart Switch
$19.90
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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 Shelly PM Mini Gen3 lead our ranking of smart relays under $20, ordered by customer rating weighted by how many reviews back it. The full list compares 13 products in this price range.
How many smart relays cost less than $20?
This page tracks 13 smart relays under $20 from 5 brands, with prices starting at $11.74.
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.