Jeff Bezos Backs Cambridge AI Start-Up CuspAI in $400m Round at $2.6bn

Jeff Bezos has thrown his weight behind one of Cambridge’s most closely watched artificial intelligence ventures, joining a $400 million fundraising that values materials-discovery specialist CuspAI at $2.6 billion.

The Amazon founder is backing the company through Bezos Expeditions, the private investment vehicle he created in 2005 to manage his fortune and which has previously taken stakes in Twitter, Uber and Airbnb. According to the Financial Times, which first reported the deal, Bezos is investing alongside Kleiner Perkins, the Silicon Valley venture capital firm. The round more than quadruples the valuation CuspAI carried last September, when it was worth $520 million.

CuspAI was founded in 2024 by Chad Edwards, who had previously built a quantum computing unicorn, and Max Welling, a professor of machine learning at the University of Amsterdam. Its advisory bench is formidable: it counts among its counsel Yann LeCun and Geoffrey Hinton, the 2024 Nobel laureate often described as a godfather of modern AI, two of the most influential researchers in the field.

The company’s pitch is, in essence, a search engine for matter. Rather than relying on the slow, costly trial and error that has long defined materials science, CuspAI lets customers specify the properties they need, then uses its models to assemble candidate molecular and atomic structures and test them inside a digital simulation. The promise is a development cycle measured in months rather than decades.

That ambition is already drawing serious customers. ASML and Meta are among the businesses using the platform to hunt for new materials, and last month CuspAI said it had worked with Kemira, a Finnish chemicals group, on materials capable of stripping so-called “forever chemicals” from water. Kemira is now pressing ahead with 20 candidates, having sifted through 300 trillion possible structures over six months, a scale of exploration that would be unthinkable by conventional laboratory methods.

The raise lands amid a striking run of form for British AI. It follows substantial rounds for PhysicsX and for Ineffable Intelligence, the London venture that recently secured Europe’s largest-ever seed round. In the first quarter of this year, UK AI start-ups raised $5.8 billion between them, more than France, Germany and the Netherlands combined, a figure that lends fresh credibility to ministers’ claims that Britain can compete at the frontier.

Bezos himself has been making the case for the technology in unusually bullish terms. Speaking at a conference in Paris, he dismissed fears that AI would render workers obsolete. “I know there’s a lot of concern that many people have, including many smart people, that AI is going to make humans redundant and so on,” he said. “I totally disagree with this point of view. I think, in fact, AI is going to create a labour shortage.” It is a theme that runs through his wider portfolio of bets on applied AI, from scientific research to the engineering-focused venture Project Prometheus he has been quietly assembling.

For Cambridge, the deal is further evidence that the cluster’s reputation for deep science is translating into the kind of capital that keeps fast-growing companies on British soil, a concern that has shadowed the sector even as investment in homegrown AI infrastructure accelerates. For the broader economy, it is a reminder that the next generation of AI value may lie not in chatbots but in the unglamorous, high-stakes business of inventing the materials on which physical industries depend.

CuspAI declined to comment. Kleiner Perkins and Bezos Expeditions did not respond to a request for comment.