Chai Discovery
Applications · US
Chai Discovery was valued at $3.8B as of 14 July 2026 (reported). Source: Chai Discovery, $400M Series C led by Index Ventures with Kleiner Perkins, Sequoia and Dimension; existing investors including OpenAI and Thrive Capital participating (company release - it states the round, not a post-money).
Generative models for molecular design - antibodies, proteins and other therapeutics designed from scratch, with Chai-3 the current model; named partners include Eli Lilly, Pfizer and Novartis.
- Valuation
- $3.8B
- Confidence
- reported
- As of
- 14 July 2026
- Layer
- Applications
- Signal
- molecule design
- Website
- chaidiscovery.com
Relationships (1)
Notes
Generative models for molecular design - antibodies, proteins and other therapeutics designed from scratch, with Chai-3 the current model; named partners include Eli Lilly, Pfizer and Novartis. The $400M Series C is company-announced, but the $3.8B post-money (roughly triple the $1.3B December 2025 Series B) appears only in trade coverage, not in the release, so the mark is reported. OpenAI has backed the company since its 2024 seed and joined the Series C.
Sources
- Chai Discovery, $400M Series C led by Index Ventures with Kleiner Perkins, Sequoia and Dimension; existing investors including OpenAI and Thrive Capital participating (company release - it states the round, not a post-money) 2026-07-14
- Endpoints News, Chai Discovery gets $400M, tripling valuation from seven months ago (the $3.8B post-money) 2026-07-14
- FierceBiotech, Chai brews up $400M Series C to fuel AI molecule models used by Lilly, Novartis and Pfizer 2026-07-14
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Last updated 14 July 2026. Follow Chai Discovery in any feed reader to hear when its valuation moves.
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