Adaptive Security Raises $81M to Address AI-Driven Impersonation Risk

Adaptive Security has raised $81 million in a Series B round led by Bain Capital Ventures, with participation from NVentures, OpenAI Startup Fund, Andreessen Horowitz, Abstract Ventures, Capital One Ventures, and Citi Ventures. The round brings the company’s total funding to $146.5 million and marks its third financing announcement in 2025, following a $43 million Series A in April and a $12 million follow-on round in September.

The funding comes amid growing concern over AI-powered social engineering and impersonation attacks. Since launching publicly in January 2025, Adaptive says it has grown to more than 500 enterprise customers, including large brands across technology, media, sports, and financial services. Investor interest reflects a broader shift in how organizations are assessing human-layer risk as generative AI lowers the barrier to convincing fraud.

Adaptive focuses on AI-enabled impersonation threats that extend beyond email to voice calls, text messages, and video. The company’s platform simulates deepfake and social engineering scenarios to expose where controls and decision-making break down, then delivers targeted training based on employee responses. It also includes automated threat triage and executive risk scoring to help organizations understand which roles and workflows are most exposed.

Backers such as NVIDIA and the OpenAI Startup Fund signal increasing attention from the AI ecosystem itself to downstream security risks. As synthetic audio, video, and messaging become easier to generate and harder to verify, Adaptive is positioning its technology around preparedness and awareness rather than traditional perimeter defenses. The new capital is expected to support continued product development and customer expansion as impersonation-based attacks move further into the mainstream.