xAI

Elon Musk founded xAI in 2023 as his direct answer to OpenAI, raising $6 billion at a $24 billion valuation — 25% higher than Mistral AI's Series B in the same year. Grok, xAI's AI assistant integrated into X (Twitter) with 500M+ users, gives the company unparalleled real-time data access and a captive audience of hundreds of millions.