AI Security Funding
HiddenLayer Secures $100 Million Series B Funding to Expand AI Security Platform
Anonymous
Key Points
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HiddenLayer is supported by a frontier model ecosystem, with a frontier model provider on its list serving more than 700 million weekly users, underscoring the scale of the AI landscape the company aims to defend.
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HiddenLayer researchers have contributed to major security and standards initiatives, including CISA/JCDC, MITRE, NIST, OWASP, and OpenSSF.
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The company has appointed Mike Gesnaldo as Chief Revenue Officer to lead growth, sales expansion, and channel partnerships.
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HiddenLayer plans to accelerate international expansion, focusing first on Europe and the broader EMEA region to broaden its footprint.
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Total funding raised to date is about $156 million, including a $6 million seed round.
HiddenLayer, an Austin-based AI security company, has raised $100 million in Series B funding led by Delta-v Capital SecurityWeek, bringing total funding to over $155 million. The round includes backing from Ten Eleven Ventures, Morgan Stanley, Microsoft's M12, and Booz Allen Ventures, reflecting growing enterprise demand for protections against AI model attacks and supply-chain risks SecurityWeek.
The investment will expand HiddenLayer's AI security platform across discovery, runtime monitoring, and attack simulation. The company now serves more than 50 new platform customers generating tens of millions in annual recurring revenue, supported by partnerships with frontier model providers reaching hundreds of millions of weekly users TMCNet.
Building Defenses Across the AI Lifecycle
HiddenLayer protects AI systems at every stage—from discovering vulnerabilities in the AI supply chain to monitoring models during runtime. The company's platform catches adversarial manipulation attempts and supply-chain attacks before they cause damage SAASNEWS. New offerings include Agentic Runtime Security and Agent Harness Security, which guard autonomous coding agents against compromise TMCNet.
Why Major Investors Backed the Round
The investor mix signals serious enterprise focus on AI defense. Security specialists like Ten Eleven Ventures joined financial firms (Morgan Stanley) and tech giants (Microsoft's M12) in the round SecurityWeek. This blend shows AI security is now a cross-sector priority—not just a niche concern SAASNEWS.
Expanding Revenue and Team Leadership
HiddenLayer appointed Mike Gesnaldo as Chief Revenue Officer to accelerate sales growth and channel partnerships SAASNEWS. The company serves a frontier model provider whose ecosystem reaches over 700 million weekly users—a staggering scale that demonstrates the AI landscape HiddenLayer must protect TMCNet.
International Push and Industry Leadership
HiddenLayer plans to expand internationally, targeting Europe and the EMEA region first SecurityWeek. The company also contributes to major security standards through CISA, MITRE, NIST, OWASP, and OpenSSF—positioning it as a trusted voice in AI safety TMCNet.
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