Startup · United Kingdom
Ineffable Intelligence
HQ London, United KingdomFounded 202511-50 employees
Ineffable Intelligence is an AI research company whose mission is to make first contact with superintelligence.
Funding1 round · $1.10B
- Equity raised
- $1.10B
- Latest
- $1.10BSeed · Apr 27, 2026
- Last valuation
- $5.10B?Basis not stated · Seed · Apr 27, 2026
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Apr 27, 2026 | Seed | $1.10B | $5.10B? | Lightspeed Venture Partners, Sequoia Capital | Reported |
- $1.10BApr 27, 2026
Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.
People2
- David Silver
founder
- David Silver
CEO
Sources7
Profile4
- 1CompanyIneffable Intelligence
Ineffable Intelligence · Supports Organization · description, Organization · linkedin url, Organization · name, Organization · website
“Ineffable Intelligence is an AI research company whose mission is to make first contact with superintelligence.”
- 2
PitchBook · Supports Organization · employee range, Organization · founded year, Organization · x url
“employee_range: 11-50 (profile: 12)”
- 3
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "UK", "hq_iso2": "GB", "id": "a470b787-62f7-424e-b1f6-4dc869c7938c"}”
- 4
LinkedIn · Supports Organization · employee range, Organization · hq city
“employee_range: 11-50 (profile: 11-50 employees)”
Funding1
- 5
Reuters · Apr 27, 2026 · Supports Funding round · amount, Funding round · post money valuation usd, Organization · ownership
“has raised $1.1 billion”
People2
- 6
businesscloud.co.uk · Supports Role
“Who is Ineffable Intelligence founder David Silver?”
- 7NewsBio
davidstarsilver.wordpress.com · Supports Role
“David Silver is the CEO of Ineffable Intelligence, was the former lead of the reinforcement learning team at DeepMind, and is a professor at University College London.”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.