
AI Boom: 55 US Startups Hit $100M+ Funding in 2025
In 2025, 55 US-based AI startups secured funding rounds of $100 million or more, indicating continued growth in the AI sector following a strong 2024. While fewer companies achieved billion-dollar rounds compared to the previous year, a greater number secured multiple funding rounds, and early activity in 2026, including significant investments in xAI and Merge Labs, suggests sustained momentum in AI development and investment. Noteworthy December 2025 funding included Mythic's $125 million round for AI-focused computing and Chai Discovery's $130 million Series B to advance AI in biotech.


















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