HiddenLayer Raises $100M Series B for AI Security as ARR Grows 10x

AI security company HiddenLayer, based in Austin, Texas, announced a $100 million Series B funding round on September 2, 2026¹.

• Delta-v Capital led the round, with participation from Ten Eleven Ventures, Morgan Stanley, M12 (Microsoft’s venture fund), and Booz Allen Ventures¹
• The company says annual recurring revenue grew more than 10x over the past year and it signed more than 50 new platform customers. It has not disclosed dollar figures¹
• The funding goes toward Agentic Runtime Security capabilities and Agent Harness Security, a new solution that secures AI coding agents at runtime¹. Its Series A three years ago was reportedly $50 million²

HiddenLayer says its platform secures agentic, generative, and predictive AI applications across the entire AI lifecycle, from discovery and AI supply chain security through attack simulation and runtime protection¹. According to the company’s own 2026 research, 96% of organizations already consider AI critical to core operations, while nearly a third cannot say with certainty whether they have experienced an AI-related breach¹. If you are bringing agents that autonomously write and ship code into a development pipeline, a layer that governs and monitors what those agents may do at runtime becomes newly necessary — which is what this funding is aimed at.

Sources

1. HiddenLayer Raises $100M Series B to Advance Trustworthy AI - HiddenLayer press release (September 2, 2026)
2. HiddenLayer nabs $100M as enterprises rush to secure their AI deployments - TechCrunch (September 2, 2026)