Fractile has raised a $720 million Series C to build chips designed for AI inference. The round values the British startup at $7 billion. The UK government backed the round through its Sovereign AI Venture Fund and the British Business Bank.
Thrive Capital, Founders Fund, Lightspeed and Redpoint led the round. CapitalG, BlackRock, DST Global, Elad Gil, Balderton and SV Angel also took part. The UK government said the round was worth more than £500 million and valued the company at over £5 billion.
A chip built for long inference runs
Fractile builds chips that run trained AI models when they generate answers, a step known as inference. Its design stacks DRAM memory on top of each chip, instead of keeping memory in separate modules. The company says this shortens the path data must travel and keeps large models running fast.
The approach matters more as AI systems take on longer chains of tasks. Agentic tools ask models to plan, check their own work and call other software, which keeps more context in memory for longer.
Fractile also builds a machine learning compiler to run large language models on its chips at full speed. The company describes itself as a chip-first frontier AI company, working across hardware, software and machine learning research.
Why the UK government is involved
The government framed the investment as a step toward building more AI hardware in Britain. It wants the country to hold a greater stake in the technology that powers AI, rather than watching the industrial rewards of British research land elsewhere.
“Fractile represents the very best of British ambition, bringing together world-class chip design, engineering and AI expertise to develop faster, cheaper and more energy-efficient hardware.”
Kanishka Narayan, AI Minister
What the money will fund
Fractile plans to ship its first chips and systems next year. Founder and chief executive Walter Goodwin wrote that “there is still a lot of work ahead”, and that the new funding will help the company reach that first shipment.
The round follows a $220 million Series B in May, which valued Fractile at about $1 billion. That round was led by Accel, Founders Fund and Factorial Funds. Fractile was founded in the summer of 2022, and the new valuation is roughly seven times the May figure. You can follow this year’s AI funding rounds on our funding tracker.
