Zenity Raises $125M Series C to Expand AI Agent Security Platform

Zenity has raised $125 million in a Series C round to expand its AI agent security platform, according to a report from HPCwire. The round is the latest sign that investors are pouring money into the security layer around enterprise AI agents.

The company builds security and governance tools for AI agents — the software assistants that increasingly read emails, query internal systems, and take actions on behalf of employees. As more organizations move agents from pilots into production, the access those agents hold creates attack surface that conventional security tools were not designed to cover.

The new capital is earmarked to expand Zenity's agent security platform at a moment when enterprise adoption of agentic AI is accelerating.

Agent security has quickly become one of the most active corners of enterprise security. Because agents can hold credentials, access data, and execute actions autonomously, they introduce questions about authorization, oversight, and accountability that legacy security stacks do not answer on their own.

The size of the round signals that investors see agent security as a standalone category rather than a feature bolted onto existing tools. A nine-figure Series C gives Zenity the runway to compete for enterprise customers who are still figuring out how to govern their agents.

What to watch next: how Zenity deploys the capital, whether it expands beyond its current focus into broader agent governance, and how the competitive landscape for agent security consolidates as more enterprises standardize on agent platforms.

For enterprises, the round is another reminder that AI agents are being treated as infrastructure worth securing — and that the security market around them is maturing quickly.