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.
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
| Investor | Role |
|---|---|
| Sequoia Capital | Lead |
| Andreessen Horowitz | Co-investor |
| Valor Equity Partners | Lead |
| Fidelity Investments | Co-investor |
| Vy Capital | Co-investor |
| Kingdom Holdings | Co-investor |
| Lightspeed Venture Partners | Co-investor |