CuspAI raises £334M to design new materials with AI

CuspAI, a Cambridge company using AI to discover new materials, has raised around £334M, or roughly $450M, in one of the largest UK AI rounds so far this year. The round was led by the venture firms Kleiner Perkins and NEA, and its backers include Britain’s Sovereign AI Venture Fund, the government-backed vehicle set up to take stakes in strategically important AI companies.

The money is meant to scale what CuspAI calls its materials foundry: a system that searches for and designs molecular structures with specific properties, starting with materials that capture carbon. The pitch is that AI can shortcut the slow laboratory work of trying one candidate compound after another, proposing promising structures for chemists to make and test.

For the UK, the round lands two ways. It is a vote of confidence in Cambridge as a centre for AI applied to physical science, and the presence of the Sovereign AI Venture Fund makes it an early, visible test of the government’s willingness to co-invest alongside private capital in companies it considers strategic. It also follows a pattern we noted in our coverage of Isomorphic Labs, another well-funded UK company pointing AI at science rather than chatbots.

The technology rests on a foundation model, a large general-purpose system trained once on a broad body of data and then adapted to specific tasks. Where a language model learns the patterns of text, CuspAI’s models learn the patterns of chemistry, using machine learning to predict how a proposed material will behave before anyone makes it. Whether that translates into materials working at industrial scale is the harder question the funding is meant to answer, and one that will take years rather than months.