HiddenLayer has raised $100 million in Series B funding led by Delta-v Capital, with participation from Ten Eleven Ventures, Morgan Stanley, M12, Microsoft’s Venture Fund, and Booz Allen Ventures.
The AI security company plans to use the funding to expand its enterprise platform, including its Agentic Runtime Security capabilities and a new Agent Harness Security offering designed to protect autonomous AI coding agents operating in production environments.
HiddenLayer’s annual recurring revenue grew by more than 10 times over the past year, while the company added more than 50 new platform customers across financial services, government, technology, pharmaceuticals, airlines, defense and intelligence.
The company also supports a leading frontier model provider in securing systems serving more than 700 million weekly users.
HiddenLayer’s research organization holds 39 granted patents and 65 pending patents covering areas including adversarial detection, model protection and AI threat analysis.
Its researchers have also contributed to initiatives involving CISA/JCDC, MITRE, NIST, OWASP and OpenSSF.
The company is focusing the new capital on runtime security for AI agents, securing agentic harnesses and protecting autonomous coding agents that can write, review and ship code with substantially less human oversight.
HiddenLayer also recently named Mike Gesnaldo as Chief Revenue Officer and plans additional hiring as it expands channel relationships and increases its international presence, initially focusing on Europe and the broader EMEA region.
KEY QUOTES:
“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.”
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. 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.”
Dan Williams, Partner at Delta-v Capital
“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. We expect that conviction to continue to grow as autonomous systems become more and more integral to the enterprise.”
Mark Hatfield, Co-Founder and Partner at Ten Eleven Ventures
“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. We are delighted to be investing in HiddenLayer to foster its next phase of growth and innovation.”
Zheng Wang, Head of Strategic Investments at Morgan Stanley
