OpenAI backs biosecurity startup Valthos with $30 million funding

Published 24/10/2025, 12:26
OpenAI backs biosecurity startup Valthos with $30 million funding

Investing.com -- Valthos Inc., a New York-based biosecurity software startup, has emerged from stealth mode with $30 million in funding from OpenAI, Founders Fund, and Lux Capital.

The company, co-founded by Kathleen McMahon and Tess van Stekelenburg, is developing AI-powered tools to defend against potential bioweapon attacks that could be accelerated by artificial intelligence advancements.

McMahon, who serves as chief executive officer and previously led Palantir Technologies Inc.’s life sciences division, explained the company’s mission: "The only way to deter an attack is to know when it’s happening, update countermeasures, and deploy them fast."

Valthos’s software aggregates biological data from commercial and government sources, including air and wastewater monitoring, then applies AI to identify emerging threats and assess risks. The nine-person startup is also developing AI systems to update medical countermeasure designs for evolving threats and plans to partner with pharmaceutical companies for manufacturing and distribution.

Co-founder van Stekelenburg, a venture partner at Lux Capital with expertise in computational neuroscience and biology, had been searching for a biodefense company to back before deciding to launch Valthos with McMahon.

This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.

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