# HiddenLayer $100M Series B for AI security

> HiddenLayer has raised $100 million in a Series B aimed at a fast-emerging problem: securing AI systems while they are actually running. The round pushes the company's total funding past $155 million and reflects growing enterprise anxiety about attacks that target models and agents directly rather than the servers around them. The company's platform focuses on runtime security, plus agent discovery and AI supply-chain protection, meaning it tries to find the AI agents operating inside an organization and guard them against tampering, hijacking, and malicious inputs. As companies wire autonomous agents into real workflows, each one becomes a new thing that can be manipulated or turned against its owner. The timing is not subtle. Fresh reports of AI orchestration tools being exploited to steal API keys underline why investors are backing defenses built specifically for AI. Traditional security tools were not designed for models that take actions on their own, and HiddenLayer is betting that protecting the agents themselves will be its own large and necessary category.

_Section: [AI Funding Tracker](https://www.wortins.com/funding) · Source: SecurityWeek · Published Saturday, September 5, 2026_

## Wortins' read

HiddenLayer has raised $100 million in a Series B aimed at a fast-emerging problem: securing AI systems while they are actually running. The round pushes the company's total funding past $155 million and reflects growing enterprise anxiety about attacks that target models and agents directly rather than the servers around them. The company's platform focuses on runtime security, plus agent discovery and AI supply-chain protection, meaning it tries to find the AI agents operating inside an organization and guard them against tampering, hijacking, and malicious inputs. As companies wire autonomous agents into real workflows, each one becomes a new thing that can be manipulated or turned against its owner. The timing is not subtle. Fresh reports of AI orchestration tools being exploited to steal API keys underline why investors are backing defenses built specifically for AI. Traditional security tools were not designed for models that take actions on their own, and HiddenLayer is betting that protecting the agents themselves will be its own large and necessary category.

## Source

[Read the full story at SecurityWeek](https://www.securityweek.com/hiddenlayer-raises-100-million-for-ai-runtime-security/)

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