UK AI chip startup Fractile has raised a $220m (£162.8m) Series B round to accelerate the build of its next-generation inference hardware for AI.
Inference hardware is designed to run pre-trained AI models and make real-time predictions, decisions or generative outputs. Fractile is developing chips and systems designed to make faster inference economically viable, working across AI research, chip micro-architecture and foundry process innovation.
The startup believes the next major limit on AI progress is the time and cost required to produce useful outputs at scale. As advanced AI systems take on harder, longer-running tasks that can require tens of millions of generated tokens. Fractile is striving to address this need.
The new funding will be used to accelerate the delivery timeline for its first chips and systems, and scale its teams across the UK, US and Taiwan.
The financing round was led by Accel, Factorial Funds and Founders Fund, with participation from Conviction, Gigascale, O1A, Felicis, Buckley Ventures and 8VC, plus existing backers.
In a statement posted on the company’s blog, Walter Goodwin, CEO and founder at Fractile, says: “The workloads that push to the limits of the current frontier are already transformational. The ones that lie beyond that frontier, that we are about to break open, will stretch our imaginations and redefine the entire economy.
“Fractile is seeking to increase the clock speed of global progress, one chip at a time.”
New data published by NatWest earlier this year showed VC funding into British businesses is increasingly concentrating into larger bets on fewer firms, with the AI sector being a top beneficiary.
UK startups raised £17.5bn across more than 2,000 deals in 2025 – with the AI sector pulling in over a third of the total share with more than £6bn raised.
