AI security company HiddenLayer has raised $100 million in Series B funding. The funding round was led by Delta-v Capital, with participation from Ten Eleven Ventures, Morgan Stanley, M12 (Microsoft’s venture fund), and Booz Allen Ventures.
HiddenLayer helps businesses protect their AI applications, including generative AI, predictive AI, and AI agents. The company will use the new funding to strengthen its enterprise security platform and expand its AI security capabilities.
The funding will also support Agent Harness Security, a new solution designed to protect AI coding agents while they are running. This will help businesses safely use autonomous coding agents as part of their software and technology systems.
“We set out to pioneer trusted, secure use of AI for enterprises, long before most organizations saw the urgency we do today. This funding lets us keep growing the purpose-built team and platform required to meet that moment as agentic AI becomes core to how enterprises operate,” said Chris Sestito, CEO and Co-Founder of HiddenLayer.
“Traditional security tools were built for code and infrastructure, not for models that can be poisoned, hijacked, or manipulated through their own inputs,” said Dan Williams, Partner at Delta-v Capital. “HiddenLayer built a platform from the ground up to secure AI across its full lifecycle, from the model at its core to the agentic systems being layered on top and whatever architecture comes next. We’ve watched this team turn deep adversarial-AI research into a product CISOs actually rely on, and we’re proud to partner with them.”
“Enterprises don’t shift budgets at this pace unless a problem is urgent. HiddenLayer’s growth over the past year across defense, financial services, and some of the most sensitive AI deployments in the world demonstrates that security teams have concluded that AI needs its own category of protection,” said Mark Hatfield, Co-Founder and Partner at Ten Eleven Ventures. “We expect that conviction to continue to grow as autonomous systems become more and more integral to the enterprise.”
“HiddenLayer was early to recognize that enterprise security is critical to the safe deployment of AI, and its buildout of an end-to-end platform to enable compliant AI adoption is an important contribution to addressing this market need,” said Zheng Wang, Head of Strategic Investments at Morgan Stanley. “We are delighted to be investing in HiddenLayer to foster its next phase of growth and innovation.”
HiddenLayer helps businesses protect their AI applications throughout the entire AI development process. Its platform provides security from the early stages of discovering AI systems and checking AI supply chains to testing for attacks and protecting AI applications while they are running.
The company uses its own technology and AI security research to protect AI systems from new and changing threats. HiddenLayer helps businesses protect their valuable data and technology, meet security and regulatory requirements, and safely use AI at a larger scale.
