HedgeCo.Net — Fractile, a London- and Bristol-based developer of AI inference chips, has raised $720 million in a Series C round at a $7 billion post-money valuation, making it one of Britain’s most valuable technology startups. The round was co-led by Thrive Capital, Founders Fund, Lightspeed and Redpoint, according to the company and its investors.
Other backers include Alphabet’s CapitalG, BlackRock, DST Global, T. Rowe Price, Dragoneer and Balderton, along with the UK’s Sovereign AI fund and the British Business Bank, Reuters and investor disclosures showed. Returning investors include Accel, Conviction and Felicis, according to Georgian, which also participated.
The valuation marks a sharp step up from May, when Fractile raised about $220 million at a valuation of roughly $1 billion, The Next Web reported, citing the Financial Times. The company, founded in 2022, is designing chips that aim to speed up inference, the process by which AI models generate responses, while cutting energy use and cost.
Fractile has not yet shipped a commercial product. It plans to launch its first chip next year, and investors said the new capital is intended to bring its first chips and systems to customers, with a platform ramp targeted for the second half of 2027. That means the valuation rests on prototypes and the team’s technical approach rather than revenue.
The round shows how crossover and public-market investors are again crowding into late-stage AI infrastructure deals, often alongside sovereign capital. For venture LPs, rounds of this size at pre-revenue stages concentrate risk in a handful of hardware bets, but they also reflect conviction that inference costs, not model training, will define the next phase of AI spending.