HiddenLayer Raises $100M as AI Security ARR Jumps 10x

HiddenLayer raised a $100 million Series B as its annual recurring revenue jumped 10x in the past year. The AI security company focuses on protecting models from adversarial attacks.

Key Points:

• The round was led by Delta-v Capital; M12 (Microsoft), Morgan Stanley, and Booz Allen Hamilton participated.

• HiddenLayer is based in Austin and specializes in AI model security — protecting against adversarial attacks, model extraction, and other AI-specific threats.

• The 10x ARR growth reflects rapidly increasing enterprise demand for AI security solutions.

The funding and growth figures arrive the same week that GPT-6 Astra crossed the Critical cybersecurity threshold and Gemini 3.8 Flash Cyber demonstrated 2.6x better patch quality. AI security is becoming a standalone category with dedicated budgets.

Why It Matters: The 10x ARR growth and participation from defense and enterprise investors signals that AI security is maturing from a niche concern into a category with significant market demand.