UK-headquartered Ineffable Intelligence has raised $1.1 billion in seed funding.
Ineffable Intelligence, founded in 2025 by David Silver, a former top Google DeepMind researcher, aims to beat top large language models by using “reinforcement learning” or AI training by trial-and-error/experience.
In a post on X, Ineffable stated they are “assembling the best engineers and researchers in the world to make first contact with superintelligence. We’ll be solving the hardest problems in AI on the way.”
As part of the funding round, Sequoia and Lightspeed led, with participation from Nvidia, DST Global, Index, Google, and the UK’s Sovereign AI Fund, which includes the British Business Bank.
The funding round represents the largest European seed round in history.
Charlotte Lawrence, Managing Director of Direct Equity, British Business Bank, commented:
“David Silver is a generational talent who has consistently been on the cutting edge of AI development. Ineffable Intelligence has the potential to produce a paradigm shift in our scientific and technology landscape, and we are incredibly excited to be supporting him and his team in this endeavour.”
George Mills, Investment Director, British Business Bank, declared that the UK produces world-class AI talent, and they are pleased to back these important businesses to scale and stay in the UK.”
The UK and continental Europe, in general, have fallen behind in the strategically important AI race. The support Ineffable Intelligence has garnered from the global community speaks well for the startup’s prospects.