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Factory

Matan Grinberg, who co-authored a physics paper with Juan Maldacena as a Princeton undergraduate, left his Berkeley PhD after a cold email to Sequoia's Shaun…

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Founder stories

Factory: A String Theorist Quit His PhD After a Three-Hour Walk, Teamed Up With a Hugging Face Engineer and Built Coding "Droids"

Matan Grinberg, who co-authored a physics paper with Juan Maldacena as a Princeton undergraduate, left his Berkeley PhD after a cold email to Sequoia's Shaun Maguire. Reunited with Princeton acquaintance Eno Reyes at a LangChain hackathon, he co-founded Factory, which builds autonomous "Droids" for software engineering. Factory raised a $5 million seed in 2023, a $15 million Series A at a $120 million valuation in 2024, and a $50 million Series B at a $300 million valuation in September 2025.

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About the startup

Matan Grinberg, who co-authored a physics paper with Juan Maldacena as a Princeton undergraduate, left his Berkeley PhD after a cold email to Sequoia's Shaun Maguire. Reunited with Princeton acquaintance Eno Reyes at a LangChain hackathon, he co-founded Factory, which builds autonomous "Droids" for software engineering. Factory raised a $5 million seed in 2023, a $15 million Series A at a $120 million valuation in 2024, and a $50 million Series B at a $300 million valuation in September 2025.

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Factory: A String Theorist Quit His PhD After a Three-Hour Walk, Teamed Up With a Hugging Face Engineer and Built Coding "Droids"

Matan Grinberg, who co-authored a physics paper with Juan Maldacena as a Princeton undergraduate, left his Berkeley PhD after a cold email to Sequoia's Shaun Maguire. Reunited with Princeton acquaintance Eno Reyes at a L

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