Seed · AI & Machine Learning · London, United Kingdom · Founded 2025 · 11–50 employees
Ineffable Intelligence is a London-based AI research lab developing artificial superintelligence through reinforcement learning. Founded by former Google DeepMind research lead David Silver, the lab builds superlearners that discover mathematics, science, and language via direct experience in simulated environments rather than relying on human text or pre-training data. The company raised $1.1 billion in seed funding at a $5.1 billion valuation in April 2026. Its investor syndicate includes Sequoia Capital, Lightspeed Venture Partners, NVIDIA, Google, and Microsoft.
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