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Harmonic Security

AI governance and control platform for workforce and agentic AI use

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Products
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Founded
2023
Employees
51-200
Headquarters
San Francisco, California, United States

About Harmonic Security

Harmonic Security builds an AI governance and control platform that gives security teams visibility and inline enforcement over how employees and AI agents use generative AI. Founded in 2023 by Alastair Paterson and Bryan Woolgar-O'Neil, the company is headquartered in San Francisco with an office in London and has raised more than $26 million, including a $17.5 million Series A led by Next47 in October 2024. It sells to regulated enterprises in technology, legal, insurance, and healthcare.

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Info last updated on July 26, 2026

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