Ineffable Intelligence
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Investors
About
Ineffable Intelligence is a UK-based AI lab pursuing artificial superintelligence through reinforcement learning, founded in late 2025 by David Silver, former lead of DeepMind’s reinforcement learning team and a UCL professor 12. The company is building a “superlearner” designed to acquire knowledge and skills from its own experience rather than human-generated data, extending the self-play paradigm Silver pioneered with AlphaZero 12. The April 2026 round at $5.1B valuation is reportedly Europe’s largest seed financing on record 23.
Funding History
| Date | Round | Amount | Lead | Co-investors |
|---|---|---|---|---|
| 2026-04-27 | Seed | $1.1B | Sequoia Capital, Lightspeed Venture Partners | Index Ventures, Google, Nvidia, DST Global, British Business Bank, UK Sovereign AI Fund 123 |
What Investors Say
No independently sourced investor quotes found.
What Founders Say
David Silver, on the company’s mission: “Our mission is to make first contact with superintelligence… We are creating a superlearner that discovers all knowledge from its own experience, from elementary motor skills through to profound intellectual breakthroughs” 2.
Sources
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TechCrunch, “DeepMind’s David Silver just raised $1.1B to build an AI that learns without human data,” April 27, 2026. https://techcrunch.com/2026/04/27/deepminds-david-silver-just-raised-1-1b-to-build-an-ai-that-learns-without-human-data/↩↩↩
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EU-Startups, “Ineffable Intelligence lands historic $1.1 billion Seed round at $5.1 billion valuation,” April 27, 2026. https://www.eu-startups.com/2026/04/ineffable-intelligence-lands-historic-1-1-billion-seed-round-at-5-1-billion-valuation/↩↩↩↩↩
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Bloomberg, “Sequoia and Nvidia Back Ex-DeepMind Researcher’s New AI Startup at $5.1 Billion Value,” April 27, 2026. https://www.bloomberg.com/news/articles/2026-04-27/sequoia-and-nvidia-back-ex-deepmind-researcher-at-5-1-billion-value↩↩