Harmonic Security provides an enterprise AI governance and data protection platform that monitors, classifies and controls how employees use AI tools in real time. Founded in 2023 by Digital Shadows co-founder Alastair Paterson and CTO Bryan Woolgar-O'Neil, the company operates from San Francisco and London and builds its classification engine on custom small language models, covering browser-based AI, desktop AI tools and agentic workflows. Its software is used by more than 100 enterprise customers and millions of employees, and a Usage Intelligence layer shows organizations where AI adoption creates business value.
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Oct 14, 2026
Latest raise
Funding activity · 1 round
Oct 14, 2026
$50M
Series B
Led by Crosspoint Capital Partners
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