HiddenLayer, an AI security startup, announced a $100M funding round on Tuesday as enterprises accelerate efforts to secure their AI deployments. The company builds monitoring tools for AI agents, the plugins they use, and the broader AI supply chain.
The round comes amid growing concern about AI-specific attack surfaces: model poisoning, prompt injection, data exfiltration through AI tools, and supply chain risks from third-party AI components. HiddenLayer's platform aims to give security teams visibility into these new vectors.
The funding size signals that AI security is no longer a niche concern — it's becoming core infrastructure. As enterprises deploy more AI agents and tools, the attack surface expands, and security budgets follow.
