HexSeed Technology Raises Over £600K to Reduce Energy Waste in AI Data Centres

The funding round was led by Carbon13, with participation from Net Zero Technology Centre and Vento Ventures. The new investment adds to the funding HexSeed has already received.

The funding also allows HexSeed to access a Partnership Grant from Innovate UK. The grant was provisionally awarded earlier this year and will provide additional support as the company develops its carbon utilisation technology.

“Data centres are on track to consume a significant share of UK grid capacity within the decade, and a large proportion of that energy is lost as heat in power conversion. This funding will allow us to take our low-temperature diamond coating technology which we are developing from laboratory demonstration to working GaN devices,” said Mark Tandy, CEO and co-founder of HexSeed.

HexSeed Technology was founded in late 2025 by Mark Tandy, Dr Leonardo Santoni, and Dr Michael Glerum. The company works closely with the University of Bristol.

HexSeed is developing technology designed to reduce energy waste in data centres, which are increasingly being used to power artificial intelligence systems.

Data centres already use a large amount of electricity around the world. According to the IEA, global data centre electricity use could reach 945 TWh by 2030 as more AI-focused facilities are built.

A significant amount of the electricity used by data centres is lost as heat. This creates a major challenge because powerful computer systems need to be kept cool while handling large amounts of data.

HexSeed says gallium nitride (GaN) transistors are more energy-efficient than traditional silicon devices. However, they can generate a lot of heat when operating. The company is working on ways to manage this heat so GaN technology can reach its full potential.

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