Harmonic Security, a company that helps businesses use AI safely, has raised $50 million in a Series B funding round led by Crosspoint Capital Partners, with support from existing investors. The latest round brings the company’s total funding to $76 million and will support its future growth.

Harmonic helps more than 100 companies, including some of the world’s largest businesses, protect employees as they use AI tools. The company has also signed new distribution partnerships with Climb and Distology. With a team of more than 90 employees across the United States and the United Kingdom, Harmonic will use the funding to expand its engineering, sales, and marketing teams in both regions.

Harmonic’s platform identifies how employees use AI, understands the purpose of each task, and manages potential risks in real time. Over the past year, the company has expanded its services beyond AI tools used in web browsers to include desktop applications and AI agents that can perform tasks automatically.

By covering these different tools in one platform, Harmonic aims to help businesses reduce security risks, prevent sensitive information from being exposed, and manage AI use through both personal accounts and workplace systems.

“Every board I talk to is asking two questions: how do we reduce the risk of AI use, and are we getting value? Most vendors struggle to answer the first, yet we address both,” said Alastair Paterson, CEO and Co-Founder of Harmonic Security. “From the very start, we doubled-down on our custom small language models, which means we can benefit from a unique insight into enterprise AI use.”

“Security has too often slowed the adoption of new technology. As organizations embrace AI, they shouldn’t have to choose between moving quickly and maintaining control. Harmonic gives leaders the visibility and confidence to accelerate adoption, while empowering employees to use the tools that make them more productive, all with the right guardrails in place. We’re proud to partner with Alastair and the Harmonic team,” said Zach Sivertson, Managing Director, Crosspoint Capital Partners.

Harmonic Security helps businesses understand, manage, and protect how their employees use AI tools. Its small AI models identify sensitive information by understanding the context in which it is used, rather than just looking for specific patterns. This helps business and security teams use AI safely and confidently instead of blocking its use.