xAI logoCompany profile

xAI

xAI is Elon Musk's AI company developing the Grok large-language-model family and the Colossus supercomputer cluster. Headquartered in the Bay Area, xAI absorbed X (formerly Twitter) in 2025 and has raised more than $25B across equity and debt rounds, with a late-2025 round valuing the combined xAI–X entity at roughly $200B.

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Company snapshot

  • Active
Total funding
$25B
Funding rounds
7
Last round (Series E)
$10B
Last round date
Sep 2025
Founded
2023
Employees
1001-5000
Headquarters
Palo Alto, California, United States
Last round vs total raised$10B of $25B

Founders

Elon Musk

Industries

  • Artificial Intelligence
  • Generative AI
  • Social Media

Notable investors

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InvestorRole
Sequoia CapitalLead
Andreessen HorowitzCo-investor
Valor Equity PartnersLead
Fidelity InvestmentsCo-investor
Vy CapitalCo-investor
Kingdom HoldingsCo-investor
Lightspeed Venture PartnersCo-investor

Frequently asked questions

xAI has raised $25B in total funding across 7 rounds.

xAI's most recent round was a Series E of $10B in Sep 2025.

xAI was founded in 2023.

xAI is headquartered in Palo Alto, California, United States.

xAI has 1001-5000 employees.

xAI's notable investors include Sequoia Capital, Andreessen Horowitz, Valor Equity Partners, Fidelity Investments, Vy Capital, Kingdom Holdings.

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