Here are the 55 US AI startups that have raised $100M or more in 2025

The artificial intelligence sector has kicked off 2025 with remarkable vigor. According to TechCrunch's latest findings, 49 startups successfully completed funding rounds of $100 million or more in 2024. Notably, three of these companies secured multiple 'mega-rounds,' and seven startups achieved funding rounds that exceeded $1 billion. As we delve into 2025, the trend shows no signs of slowing down. Although fewer firms managed to raise over $1 billion this year, four companies, including Anthropic, stood out by completing two rounds beyond the billion-dollar mark. Furthermore, the number of startups raising multiple rounds has risen significantly, with eight companies achieving this milestone compared to last year. Looking ahead to 2026, early indicators suggest that the momentum is set to continue. Elon Musk's xAI has announced a staggering $20 billion Series E funding round, while Sam Altman's Merge Labs, focusing on brain-computer interfaces, has secured a $250 million seed round with OpenAI as the lead investor. As the year progresses, the industry will undoubtedly be keenly observing how these developments unfold and what they mean for the future of AI funding. For a comprehensive overview, here are the U.S.-based AI startups that raised $100 million or more in 2025, with updates provided throughout the year to reflect new deals and changes in company status.