HiddenLayer Raises $100M to Protect AI Models as Security Market Surges Past $2.8 Billion

HiddenLayer secures $100M in Series B funding led by Delta-v Capital to expand its AI protection platform globally, as the AI security market surges to $2.83 billion amid growing threats like adversarial attacks and prompt injection targeting AI models and workflows.

• AI security startup HiddenLayer raises $100 million in a Series B round led by Delta-v Capital, with participation from Ten Eleven Ventures, Morgan Stanley, Microsoft's M12, and Booz Allen Hamilton, to expand its AI protection platform globally.
• HiddenLayer's annual recurring revenue grows more than 10x over the past year, driven largely by new customers in financial services, large tech companies, and government sectors, including a frontier model provider with over 700 million weekly users.
• The AI security market is booming, with Gartner estimating $2.83 billion in spending this year alone, as companies race to protect AI models, agents, and workflows from adversarial attacks, prompt injection, and malicious code hidden inside open source models.