Excelsior Sciences is a New York City biotech building 'machine-native chemistry' - a way to make small molecules that machines can execute and AI can learn from. Its proprietary smart bloccs platform turns drug synthesis into a modular, automation-friendly, iterative process, closing the loop between AI-driven discovery and real-world manufacturing. Founded in 2024 and spun out of Deerfield Management, the company raised $95M in late 2025 to scale the platform and reshore U.S. drug discovery and production.
Michael Foley is a medicinal chemist turned serial biotech founder who is now CEO and co-founder of Excelsior Sciences, a New York company building 'chemistry that machines can do.' His proprietary 'smart blocc' building blocks let robots and AI run iterative carbon-carbon bond formation in a closed loop, aiming to collapse the wall between drug discovery and manufacturing. Foley has founded multiple biotechs, ran the Broad Institute's Chemical Biology Platform, and was founding CEO of the Tri-Institutional Therapeutics Discovery Institute. Excelsior launched with $95 million in 2025.