HiddenLayer

AI Security · Cybersecurity · Enterprise Software

Funding

HiddenLayer lands $100M Series B for agentic AI security

Enterprises are now projected to spend nearly $3 billion this year guarding AI systems from misbehaving agents, up 83% from last year.

• HiddenLayer raised a $100 million Series B led by Delta-v Capital, with Ten Eleven Ventures, Morgan Stanley, Microsoft's M12, and Booz Allen Ventures participating.
• The Austin-based startup secures agentic, generative, and predictive AI systems, scanning models and their dependencies for tampering, red-teaming for weaknesses, and monitoring live inference for prompt injection and model theft.
• New capital funds Agentic Runtime Security and a fresh product, Agent Harness Security, built to watch autonomous coding agents that write and ship code with less human oversight.
• Annual recurring revenue grew more than 10x over the past year to the 'tens of millions,' with over 90% of that growth from new customers and more than 50 platform accounts signed.
• One customer is described as a leading frontier model provider with more than 700 million weekly users, though the company hasn't named which one.
• Gartner estimates enterprises will spend $2.83 billion on AI security tools this year, an 83% jump from 2025, and forecasts nearly $4.78 billion in spending next year.
• As AI agents move from answering questions to autonomously writing and shipping code, the security boundary shifts from filtering prompts to policing real-time actions, a much harder problem enterprises are now paying to solve.