Shelly Plus 1

Quick verdict

The Shelly Plus 1 is the Swiss Army knife of smart home relays — tiny enough to fit behind a switch plate, powerful enough to handle most single-load switching. Full local control via HTTP, MQTT, or native HA integration. You do need to be comfortable with basic wiring.

Standout: Tiny Wi-Fi relay with full local API — hides behind any existing switch plate.

Last checked: 2026-03-22

Compatibility snapshot

Why it stands out

• tiny form factor fits behind most light switches and junction boxes
• excellent local control via HTTP, MQTT, or native HA integration
• very affordable for a quality in-wall relay

Reasons to hesitate

• requires comfortable wiring behind a switch — not a beginner install
• Wi-Fi only — adds to your Wi-Fi device count

Best for

• Home Assistant users who want to smart-enable existing dumb switches
• DIY electricians comfortable with in-wall wiring

Avoid if

• you are not comfortable working with mains wiring
• you want a plug-and-play smart switch with no electrical work

Privacy and local-control notes

Fully local control via HTTP API or MQTT. Cloud is optional and not needed for core relay functionality.

Home Assistant support: supported · integration path: native / local.

Buying reality check

Price notes: Very affordable per-switch cost makes whole-home automation practical.

Compare side by side: see relay comparisons →