Fractile raises $720 million in Series C

Thrive Capital, Founders Fund, Lightspeed Venture Partners and Redpoint co-led Fractile’s Series C.[2] The UK Government’s Sovereign AI Venture Fund and the British Business Bank backed the round, as did CapitalG.[3] Balderton said the investment valued Fractile at $7 billion post-money.[2] The UK Government separately described the valuation as over £5 billion.[3] Those two valuation figures are reported in different currencies and by different sources; the evidence does not provide a previous valuation for comparison.

Fractile’s design stacks DRAM directly on top of its chip logic, according to Balderton.[2] Balderton says the design provides higher memory bandwidth than HBM and more capacity than SRAM.[2] It also says the architecture lets large models run at thousands of tokens per second, including at very long contexts.[2] These are claims about the design; the evidence does not include independent performance tests or comparisons with specific products in customer deployments.

Fractile is developing hardware for AI and says its hardware aims to be faster, more energy-efficient and less costly.[3] Its approach also covers software and machine-learning research, not just chips.[3] Purpose-built AI chips are one avenue being explored to reduce the cost of running AI models in production, TechCrunch reported.[1] For teams assessing AI infrastructure, the announcement points to an alternative under development, but the evidence does not establish its commercial availability, pricing or realized savings.

Fractile is based in Bristol and London, according to the UK Government.[3] The company plans to expand its presence in Bristol.[3] The government said the investment would strengthen Britain’s sovereign capabilities and reduce dependence on fragile overseas supply chains.[3] Fractile was founded in 2022.[2] TechCrunch described it as one of the top-funded startup players developing purpose-built AI chips.[1] The evidence does not specify a timetable for the Bristol expansion or how the new funding will be allocated.