Sonoff MINI Dry Wi-Fi Smart Switch is the top pick among smart relays under $20, rated 4.7 stars across 1,072 customer reviews.
MINI Dry Wi-Fi Smart Switch
4.7(1.1K)$14.90
ZBMINIR2 Extreme Zigbee Smart Switch
4.6(1.5K)$12.90
PM Mini Gen3
4.6(1.4K)$14.49
ZBMINI-L2 Extreme Zigbee Smart Switch
4.3(970)$19.90
Basic DIN Rail Matter Over WiFi Smart Switch
4.6(344)$19.90
MINI Duo 2
4.6(313)$17.90
Basic DIN Rail Zigbee Smart Switch
4.6(168)$19.90
MINI Dry Zigbee Smart Switch
4.3(212)$14.90
Shelly i4 Gen3
4.4(147)$19.99
Relay Switch 1
4.4(100)$11.74- News by email
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MINI ONE PM Zigbee Smart Switch
4.4(98)$19.90
MINI ONE Zigbee Smart Switch
4.8(73)$17.90
MINI ONE PM Matter Over WiFi Smart Switch
5.0(2)$19.90
Basic Gen5 Matter Over WiFi Smart Switch
$5.99
Smart Light Switch Module No Neutral
$13.99
MINI ONE Matter Over WiFi Smart Switch
$17.90
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Frequently asked questions
What are the best smart relays under $20?
Sonoff MINI Dry Wi-Fi Smart Switch, Sonoff ZBMINIR2 Extreme Zigbee Smart Switch 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 16 products in this price range.
How many smart relays cost less than $20?
This page tracks 16 smart relays under $20 from 4 brands, with prices starting at $5.99.
Are these prices up to date?
Prices 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.