TL;DR

Tewke, a UK smart home start-up, has raised £1.5m from JamJar Investments, Cur8 Capital, Energy Mix Ventures, Project Ventures and Revolut co-founder Vlad Yatsenko. The funding supports go-to-market expansion and AI development for its retrofittable energy management device.

No rewiring required

Founded in 2020, Tewke built Tap — a smart home device that works without rewiring and doesn’t require a neutral wire, making it compatible with over 90% of UK housing stock. Beyond lighting control, Tap functions as an energy guide, helping households shift electricity usage in line with time-of-day tariffs to reduce costs and carbon emissions.

All core technology is developed in-house, including patented hardware, firmware and its operating system. The device uses nine onboard sensors to understand behaviour, movement, air quality and temperature patterns within the home.

AI and industry recognition

At Slush 2025, Tewke announced TewkeAI alongside Google — a contextual AI framework that uses data from Tap’s sensors to build an understanding of how a home is used. Over the past 12 months, the company achieved B Corp certification, joined the Made in Britain collective and received a Red Dot Award for Design Concept.

Tap debuted at CES 2025, with feedback confirming demand from energy-conscious consumers, installers and distribution partners.

Looking forward

The £1.5m round will strengthen Tewke’s go-to-market strategy and expand its engineering team to develop the AI systems further. With backing from JamJar — known for early investments in companies like Grind and Mindful Chef — and Revolut CTO Vlad Yatsenko, the company is positioned to scale a hardware and AI platform built entirely in the UK.