David Sontag

David Sontag is the co-founder and CEO of Layer Health, a Boston-area startup building an AI layer that reads and abstracts messy medical charts at clinician-level accuracy. He is also a professor at MIT in EECS and IMES, a principal investigator at CSAIL, and a leader in machine learning for healthcare with more than 20,000 citations across roughly 140 publications. After a decade of academic research turning raw clinical data into predictions, he took partial leave in 2025 to scale Layer Health, which raised a $21M Series A led by Define Ventures.