SONOFF MINI Extreme R4 (Matter)

Quick verdict

The SONOFF MINI R4 Matter edition packs Matter support into an absurdly small package. It hides behind your existing switch and gives you local control through Home Assistant, Apple Home, Google Home, or Alexa — all without cloud. The size is the real selling point: it fits in switch boxes where most competitors simply won't.

Standout: One of the smallest Matter-compatible smart relays — fits where others can't.

Last checked: 2026-05-31

Compatibility snapshot

Why it stands out

• extremely compact — fits in the tightest switch boxes
• Matter support for fully local cross-platform control
• dual neutral terminals make wiring two neutrals easy without extra connectors

Reasons to hesitate

• no dimming — on/off relay only
• Wi-Fi based, so no mesh networking benefits
• tiny terminal screws can be fiddly to wire

Best for

• tight switch boxes where other relays won't fit
• Matter-first setups wanting an affordable behind-the-switch relay

Avoid if

• you need dimming capability
• you're not comfortable with in-wall electrical wiring

Privacy and local-control notes

Matter-native device. When paired via Matter, control is fully local with no cloud dependency. The eWeLink app uses cloud, but Matter bypasses it entirely.

Home Assistant support: supported · integration path: matter.

Buying reality check

Price notes: Very affordable for a Matter relay. Often under $15.

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