Emporia Smart Plug vs Shelly Plug S Gen3
Side-by-side comparison of features, pricing, ratings, and alternatives.
The Emporia Smart Plug is a WiFi-controlled outlet that adds remote switching and scheduling to any plug-in appliance, but its point of difference is measurement rather than control. It reports actual energy consumption for whatever is plugged into it, which turns a guess about what is driving your electricity bill into a number. Emporia's broader product line is home energy monitoring, and the plug feeds the same app and data model as their whole-home monitors. Practically that makes it useful for the appliances people suspect but cannot prove: a second refrigerator in the garage, a space heater, an old dehumidifier, a gaming PC, or an entertainment centre that never really turns off. Alongside monitoring it does the usual smart plug work of scheduling, remote on and off, and voice assistant integration, and it is priced close to plugs that offer no measurement at all.
The Plug S Gen3 is the third generation of Shelly's compact smart plug, and unlike most plugs in this price bracket it includes power monitoring as standard rather than as a step-up feature. That makes it genuinely useful for finding which appliances are driving a bill, not just for switching things on and off remotely. It combines Wi-Fi with Bluetooth, supports schedules and automation, and works with Home Assistant, Amazon Alexa, Google Home and Apple HomeKit, plus Matter on the MTR variant. That breadth is the reason Shelly has a following among people who want local control rather than cloud dependence. Shelly sells an unusually deep catalogue around it, spanning relays, energy meters, sensors, thermostats, wall displays and smart locks across Wi-Fi, Zigbee, Z-Wave, LAN and KNXnet/IP.
- Actual energy measurement, not just remote switching
- Integrates with Emporia's whole-home monitoring for a complete picture
- Priced comparably to plugs without any monitoring capability
- Good for settling arguments about which appliance is costing money
- Power monitoring included rather than an upsell
- Strong Home Assistant and local-control support
- Works across all four major smart home ecosystems
- Backed by a very broad device range for expansion
- Requires 2.4GHz WiFi and depends on the vendor's cloud service
- Only useful for plug-in loads, not hardwired appliances
- Physical size can block an adjacent outlet on some receptacles
- Setup is less hand-held than mainstream consumer plugs
- Primarily sold into European markets with EU socket types
- The wider Shelly catalogue can be overwhelming for beginners
More alternatives & similar tools
Alternatives to Emporia Smart Plug
View all →Compact smart Wi-Fi plug with power monitoring, Bluetooth and broad smart home integration.
Compact Wi-Fi smart plug that adds app and voice control to any plugged-in appliance.
Alternatives to Shelly Plug S Gen3
View all →WiFi smart plug with real energy monitoring for tracking appliance-level power use.
The Verdict
AI-generated from listing dataShelly Plug S Gen3 offers one‑time purchase with built‑in power monitoring and broad ecosystem support, while Emporia Smart Plug adds energy tracking but requires a subscription and relies on cloud services.
Key differences
- •Shelly includes power monitoring out‑of‑the‑box; Emporia’s monitoring is tied to its whole‑home system.
- •Shelly uses Wi‑Fi + Bluetooth and optional Matter for local control; Emporia needs 2.4 GHz Wi‑Fi and vendor cloud.
- •Shelly is a one‑time purchase (EUR 23.90); Emporia incurs ongoing subscription fees.
- •Shelly integrates natively with Home Assistant, Alexa, Google, Apple; Emporia only mentions major voice assistants.
- •Emporia’s plug size may block adjacent outlets; Shelly’s compact body fits standard sockets.
Pricing & value
Shelly is a one‑time EUR 23.90 purchase; Emporia requires a subscription, increasing long‑term cost.
Features
Shelly offers power monitoring, Wi‑Fi, Bluetooth, optional Matter, and strong Home Assistant support; Emporia adds monitoring but depends on cloud.
Ease of integration
Shelly works locally with multiple ecosystems and Matter; Emporia relies on vendor cloud and 2.4 GHz Wi‑Fi only.
Size & footprint
Shelly’s compact body fits standard sockets and multi‑way adapters; Emporia can block adjacent outlets.
Running cost
Shelly has no ongoing fees; Emporia’s subscription adds recurring expense.
Choose Emporia Smart Plug if…
Households focused on detailed energy bills and already using Emporia’s whole‑home system.
Choose Shelly Plug S Gen3 if…
Tech‑savvy smart‑home users who want local control and a one‑time cost.
Common questions
Does either plug require a subscription?
Shelly Plug S Gen3 is a one‑time purchase; Emporia Smart Plug requires a subscription.
Can I use the plugs without an internet connection?
Shelly supports local control via Bluetooth/Matter; Emporia depends on the vendor’s cloud, so internet is required.
Which plug is more likely to fit a crowded outlet?
Shelly’s compact design fits standard sockets; Emporia’s larger size may block an adjacent outlet.