Investment by OpenAI Fund Boosts Adaptive Security Funding in Series A Round to Reach $55 Million
In the rapidly evolving digital landscape, a new cybersecurity player is making waves. Adaptive Security, an AI-driven company, is preparing individuals and organizations for the wave of AI-enabled impersonation with its innovative platform.
The platform, designed to combat the growing threat of AI-generated impersonation, combines simulation, training, and real-time defense into one adaptive system. This integrated approach is a response to the increasing sophistication of cyber threats, as demonstrated by the AI-generated messages impersonating U.S. Secretary of State Marco Rubio that were received by U.S. officials in June 2025.
OpenAI CEO Sam Altman, who has warned about the potential for a "fraud crisis" due to AI impersonation, has shown his support for Adaptive Security. OpenAI's investment in the company aligns with its recognition of the dangers posed by generative AI in malicious hands. Adaptive Security is, in fact, the only cybersecurity investment by the OpenAI Startup Fund.
The very mechanics of trust are being rewritten in real time. Voice, video, and text are no longer trusted at face value, and this shift is reflected in Adaptive Security's vision, where people are the new perimeter in cybersecurity. Employees could face deepfake drills as regularly as fire drills, and organizations may rely on AI-powered risk scores to make daily decisions about communication and access.
The implications of Adaptive's approach extend beyond the security industry, affecting how societies function in a world of blurred authenticity. Institutions may be forced to rethink verification at every level, such as banks abandoning biometric voiceprints, courts needing new standards for digital evidence, and employers needing ongoing safeguards against deepfake job applicants.
Ian Hathaway, a partner at the OpenAI Startup Fund, praised Adaptive Security for its product speed in building AI-native defenses for advanced threats. The company's co-founder and CEO, Brian Long, stated that cybersecurity now begins with people, not just infrastructure. This philosophy signals a cultural shift in cybersecurity, with protection focusing on reinforcing human judgment at scale to ensure people can recognize what's real in an era of perfect forgeries.
With a Series A funding of $55 million, Adaptive Security is well-equipped to tackle the challenges posed by AI-enabled impersonation. Other institutions likely to consider investing in Adaptive Security or similar AI-native cybersecurity firms include venture capital funds focused on AI and cybersecurity innovation, such as a16z and Paladin Capital Group, which have invested in comparable adaptive AI security companies like CalypsoAI.
Recent events, such as the $240 million lost by Michigan residents to AI voice-cloning and fake video schemes in 2024, underscore the urgency of addressing these threats. Adaptive Security's model suggests a future where training, simulation, and adaptive defense become as routine as antivirus scans once were. In this future, societies can continue to function securely, even as the very nature of trust evolves.
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