Chai Discovery Raises $400M in Series C Funding

Researchers use the platform to predict molecular interactions and generate candidates for laboratory testing. Chai-3 extends that work to targets that have resisted conventional discovery methods, with deployments at companies including Lilly and Pfizer.

Round size
$400M
Stage
Series C
Headquarters
United States
Announced
Jul 14, 2026

Designing molecules for a target

The models reason about biological structure and function to propose new molecular designs. The company’s latest work focuses on improving antibody binding and the success of designs tested in the laboratory.

Expanding research and deployment

The San Francisco team will expand compute, data and model research, develop the software platform and bring it to more scientists. The goal is to make candidate design a more predictable step in pre-clinical discovery.

Where the funding goes

  • Compute and research data
  • Model research
  • Product development
  • Scientific deployments

Sources

  1. Chai Discovery: funding announcement
  2. Chai Discovery: full transaction release
  3. FinSMEs: funding report
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