How much funding has Ineffable raised?

Ineffable has raised $1.1B in total funding, most recently a Seed round.

Who are Ineffable's investors?

Ineffable's investors include Alphabet, Sequoia Capital, Lightspeed VP, Nvidia, DST Global, Index Ventures.

Where is Ineffable headquartered?

Ineffable is headquartered in London, United Kingdom.

What industry is Ineffable in?

Ineffable operates in Artificial Intelligence.

Ineffable

formerly Ineffable Intelligence

Building AI that discovers all knowledge from its own experience

London, United Kingdom · Founded 2025 · $1.1B raised

Artificial Intelligence

Headquarters: London
Employees: 1–10
Founded: 2025
Business Model: B2B

Website: ineffable.ai
Total Funding: $1.1B
Last Round: $1.1B SeedApr 2026
Rounds: 1

About

Ineffable Intelligence is a London-based AI lab founded by former Google DeepMind researcher David Silver, creator of AlphaZero, aiming to build a 'superlearner' AI capable of discovering knowledge and skills without relying on human data, using reinforcement learning. The company raised $1.1 billion at a $5.1 billion valuation in a round led by Sequoia Capital and Lightspeed Venture Partners, with participation from Index Ventures, Google, Nvidia, the British Business Bank, and others.

Summary

Ineffable is an Artificial Intelligence company based in London, United Kingdom, founded in 2025. It has raised $1.1B in total across 1 round, most recently a $1.1B Seed round in Apr 2026. Investors include Alphabet, Sequoia Capital and Lightspeed VP.

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