Harmonic Security, which uses small language models to inspect employee interactions with AI tools, raised a $50M Series B, taking its total funding to $76M (Duncan Riley/SiliconANGLE)

Workplace artificial intelligence security startup Harmonic Security Inc. has raised $50 million in new Series B funding, bringing its total funding to $76 million. The company utilizes custom small language models to inspect employee interactions with AI tools, providing a verdict on each interaction within milliseconds. This platform is designed to govern how employees use AI, such as preventing the pasting of live credentials into chat windows while allowing legitimate actions like a developer referencing a database schema.

While the company's checks originally ran only in the browser, Harmonic has extended these capabilities over the past year to include desktop AI applications and agentic workflows. Co-founder and Chief Executive Alastair Paterson stated that company boards are increasingly focused on both reducing AI-related risks and determining if the technology is delivering value.

To address this, Harmonic offers a Usage Intelligence layer that allows leaders to see which AI use cases are effective, even down to the level of individual employees.

Brief written by urgent.news from Techmeme, SiliconANGLE — 2 reports on this story. Machine-written — may contain errors; check the original before relying on it.