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Chai Discovery secures $400M in Series C funding to enhance AI-driven molecular design. The round was led by Index Ventures with participation from several notable investors.

PRIVATEJul 14, 2026

Amount Raised

$400 Million

Round Type

Series C

San FranciscoInformation TechnologyBiotechnologyHealth CareArtificial IntelligenceMachine Learning

Investors

Bdt & MsdAvra CapitalSapphire VenturesKleiner PerkinsSequoia CapitalDimensionBain Capital VenturesBattery VenturesBaillie GiffordIndex Ventures

Description

Chai Discovery, focused on AI models for discovering new molecules, announced a $400M Series C fundraise. This funding round values the company at $3.8B and aims to accelerate its progress in molecular design. The investment was led by Index Ventures and included participation from Kleiner Perkins, Sequoia Capital, and many others. New investors such as Bain Capital Ventures and Battery Ventures also joined the round.

Company Information

Company

Chai Discovery

Location

San Francisco, California, United States

About

Chai Discovery is the developer of an AI-based molecular interactions platform designed for molecular structure prediction that performs state-of-the-art across tasks relevant to drug discovery. The company's platform operates models that can predict the structure of biochemical molecules and reprogram how they interact for developing new medications, enabling researchers to get unified predictions of proteins, small molecules, DNA, RNA, and covalent modifications.

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Chai Discovery raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

145 of these a day, filtered to the companies you pick, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include FundzWatch™ for automated website change detection, Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.