Harmonic Security raises $50M to govern how employees use AI

The San Francisco and London startup's oversubscribed Series B, led by Crosspoint Capital Partners, brings its total funding to $76 million Harmonic Security has closed an oversubscribed $50 million Series B round to build out what it calls workforce AI protection. Crosspoint Capital Partners led the round, and existing investors also participated. The pitch is simple. Employees are pasting company information into AI tools, and security teams want to see it, and ideally stop the bad stuff, before it leaves the building. The company announced the Series B on October 14, 2026.

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