Chai Discovery raises $400 million to advance AI-designed drug discovery

15 July 2026

US AI drug discovery firm Chai Discovery has raised $400 million in Series C financing, valuing the San Francisco-based company at $3.8 billion as it looks to expand use of its molecular design platform across the pharma industry.

The round was led by Index Ventures, alongside Kleiner Perkins, Sequoia Capital and Dimension. New investors included Bain Capital Ventures, Battery Ventures, Baillie Gifford, BDT & MSD, Sapphire Ventures and Avra Capital, while existing backers including Thrive Capital, OpenAI, Oak HC/FT, Menlo Ventures and General Catalyst also participated.

This article is accessible to registered users, to continue reading please register for free.  A free trial will give you access to exclusive features, interviews, round-ups and commentary from the sharpest minds in the pharmaceutical and biotechnology space for a week. If you are already a registered user please login. If your trial has come to an end, you can subscribe here.

Login to your account

Become a subscriber

 

£820

Or £77 per month

Subscribe Now
  • Unfettered access to industry-leading news, commentary and analysis in pharma and biotech.
  • Updates from clinical trials, conferences, M&A, licensing, financing, regulation, patents & legal, executive appointments, commercial strategy and financial results.
  • Daily roundup of key events in pharma and biotech.
  • Monthly in-depth briefings on Boardroom appointments and M&A news.
  • Choose from a cost-effective annual package or a flexible monthly subscription
The Pharma Letter is an extremely useful and valuable Life Sciences service that brings together a daily update on performance people and products. It’s part of the key information for keeping me informed

Chairman, Sanofi Aventis UK



Companies featured in this story

More ones to watch >






Company Spotlight



More Features in Pharmaceutical