Here are the 33 US AI startups that have raised $100M or more in 2025

The landscape of the AI sector in the United States has witnessed a remarkable transformation, particularly in 2024, which saw a total of 49 startups successfully securing funding rounds exceeding $100 million. This surge in investment included three firms that achieved the impressive feat of raising multiple 'mega-rounds', while seven companies managed to pull in rounds of $1 billion or more. As we approach the final months of 2025, the momentum from last year appears to be carrying over. Already, several companies have completed billion-dollar funding rounds this year, and a select few have raised funds in excess of $100 million on multiple occasions. This trend signifies a robust interest and confidence in the AI sector, which continues to evolve and attract substantial investment. This report highlights the 33 AI companies in the U.S. that have successfully raised $100 million in 2025, reflecting the ongoing growth and potential of the industry. Updates to this list were made on April 23, June 18, and August 27 to incorporate additional funding deals, showcasing the dynamic nature of the AI startup ecosystem.