Layer Health is a Boston, MA-based health technology company led by CEO David Sontag that uses large language models (LLMs) to perform chart review and data abstraction. Its AI platform is trained on longitudinal patient data to interpret both structured and unstructured EHR data at scale with clinician-level accuracy. The company focuses on enabling health systems to automatically review and interpret clinical data to generate insights. Layer Health plans to expand its offerings, advance its AI models, and deepen partnerships with health systems and other ecosystem partners. Financially, the company completed a new funding round in March 2025 to support these plans. Layer Health is an MIT spin‑out that builds AI to extract value from unstructured clinical data and address the information problem in healthcare. Its first product, Distill, ingests clinical notes and uses machine learning and large language models to perform clinical, administrative, and research tasks that require unstructured chart review. Distill integrates into existing workflows, reduces development time for use cases from months to as little as a day per the company, and adapts from customer interactions to produce customer‑specific models. The company cites beta customers including xCures and the Froedtert & Medical College of Wisconsin health network, which use Distill for trial matching, real‑world evidence curation, quality improvement, and registry submissions. Layer Health emphasizes AI safety and transparency by surfacing evidence for every prediction and maintaining a clinical team to validate models across diverse datasets and use cases. The founding team includes AI and clinical leaders such as David Sontag, Divya Gopinath, Luke Murray, Monica Agrawal, and Steven Horng.

Total raised

$25M

Funding rounds

2

Latest round

Series A

Latest activity

Mar 2025