Fractile Raises $720 Million in Series C

British AI chip startup Fractile said on the 11th local time that it raised $720 million in a Series C round, valuing the company at $7 billion. Although it has no commercial product yet, it has become one of the UK’s most highly valued technology startups. Its valuation has increased more than sixfold in six months, after it was valued at $1.1 billion in May.

Founded in 2022 and based in London and Bristol, Fractile is developing chips for AI inference, the process of generating responses to requests. It aims to increase processing speed while reducing power use and costs. Founder Walter Goodwin said computing performance had increased 1 million times over the past 25 years, while memory bandwidth had grown only about 40 times, creating a 25,000-fold gap between computing power and memory. He said even the latest chips can be limited by how quickly they retrieve data from memory.

Fractile aims to increase memory bandwidth by stacking its own DRAM on top of computing chips. Unlike designs that place GPUs and high-bandwidth memory (HBM) separately, its approach links computing circuits and memory closely to reduce data-transfer bottlenecks. The company claims the technology can make AI inference up to 10 times faster. It is also developing software to optimize its systems and AI model execution, with the goal of improving inference performance and power efficiency.

Anthropic is reportedly considering becoming an early customer, but no purchase agreement has been confirmed. Thrive Capital, Founders Fund, Lightspeed Venture Partners and Redpoint led the investment. CapitalG, Google’s investment arm, BlackRock, the UK government’s Sovereign AI Fund and the British Business Bank also participated. Philip Clark of Thrive Capital said the inference market could soon grow to the size of the market Nvidia is targeting. He expects demand for fast, low-power inference chips to increase as AI agents work independently for longer periods.

The UK government called the investment progress in developing its domestic AI chip industry and infrastructure. AI Minister Kanishka Narayan said the government aims to reduce the commercialization of UK scientific research overseas and expand domestic technology development and industrial outcomes. Fractile has not yet released a chip for mass production and plans to launch its first commercial product in 2027. Its valuation reflects prototypes and technology development to date; the company still needs to demonstrate product performance and its ability to manufacture at scale.

British AI chip startup Fractile said on the 11th local time that it raised $720 million in a Series C round, valuing the company at $7 billion. Although it has no commercial product yet, it has become one of the UK’s most highly valued technology startups. Its valuation has increased more than sixfold in six months, after it was valued at $1.1 billion in May.

Founded in 2022 and based in London and Bristol, Fractile is developing chips for AI inference, the process of generating responses to requests. It aims to increase processing speed while reducing power use and costs. Founder Walter Goodwin said computing performance had increased 1 million times over the past 25 years, while memory bandwidth had grown only about 40 times, creating a 25,000-fold gap between computing power and memory. He said even the latest chips can be limited by how quickly they retrieve data from memory.

Fractile aims to increase memory bandwidth by stacking its own DRAM on top of computing chips. Unlike designs that place GPUs and high-bandwidth memory (HBM) separately, its approach links computing circuits and memory closely to reduce data-transfer bottlenecks. The company claims the technology can make AI inference up to 10 times faster. It is also developing software to optimize its systems and AI model execution, with the goal of improving inference performance and power efficiency.

Anthropic is reportedly considering becoming an early customer, but no purchase agreement has been confirmed. Thrive Capital, Founders Fund, Lightspeed Venture Partners and Redpoint led the investment. CapitalG, Google’s investment arm, BlackRock, the UK government’s Sovereign AI Fund and the British Business Bank also participated. Philip Clark of Thrive Capital said the inference market could soon grow to the size of the market Nvidia is targeting. He expects demand for fast, low-power inference chips to increase as AI agents work independently for longer periods.

The UK government called the investment progress in developing its domestic AI chip industry and infrastructure. AI Minister Kanishka Narayan said the government aims to reduce the commercialization of UK scientific research overseas and expand domestic technology development and industrial outcomes. Fractile has not yet released a chip for mass production and plans to launch its first commercial product in 2027. Its valuation reflects prototypes and technology development to date; the company still needs to demonstrate product performance and its ability to manufacture at scale.