Overview
- Harmonic closed an oversubscribed $50 million Series B led by Crosspoint Capital Partners on Wednesday, October 14, 2026, lifting total capital to $76 million.
- The company says its platform inspects employee AI interactions in real time using custom small language models to classify tasks and enforce controls without blanket blocking, a capability it reports runs at about 200 milliseconds and yields far fewer false positives than traditional data loss prevention.
- Harmonic reports more than 100 enterprise customers covering millions of employees, has grown headcount from roughly 30 in late 2024 to over 90 in the US and UK, and has signed channel distributors including Climb Global Solutions and Distology.
- The funding arrives as buyers acquire specialist AI-security startups and large vendors add compliance integrations, a trend that could push Harmonic toward either faster scale through partners or potential acquisition by a larger security firm.
- Harmonic will invest the new capital in engineering, sales, and marketing to expand product coverage for browser, desktop, and agentic AI use and to accelerate channel-led adoption, which could change how organizations monitor and control 'shadow AI' in daily work.