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Gruff technology

Smart Wi-Fi sockets and DIN rail relays that shift household and business loads to cheap Nord Pool price hours

Tallinn, EstoniaFounded 2022grufftechnology.euWebsite technologies

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Highlights

  • Young companyFounded 2022
  • New on EvolcAdded 2026-10-28

About Gruff technology

Gruff Technology makes smart sockets and DIN rail relays that switch connected appliances on and off according to real-time Nord Pool electricity prices. The socket is controlled from a mobile app for Android and iOS and can run devices such as water heaters, underfloor heating and EV chargers during cheap hours.

Customers are households, plus offices and warehouses that can order custom business solutions with API access, reporting and a multi-device dashboard. The company sells its devices through its online shop, with the smart socket at 65,00 € and the DIN rail relay at 95,00 €.

The company is registered in Tallinn, Estonia, where its registered address is listed, and was founded in 2022. Its legal entity is Gruff Technology OÜ.

Product: Wi-Fi smart socket (up to 3.5 kW) and 64A DIN rail relay that schedule appliances by Nord Pool price, controlled via the Gruff app.

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