HexSeed Technology is a UK-based startup focused on two primary areas: carbon capture and utilization (CCU) to transform captured CO2 into high-value supermaterials, such as industrial diamonds, and developing advanced thermal management solutions for AI data centers. Their core technology involves a low-temperature microwave plasma process that grows diamond coatings directly onto finished gallium nitride (GaN) devices to improve efficiency and longevity by dissipating heat.