TLDR: Adaptive Security, an AI social engineering prevention company, has announced a follow-on investment from the OpenAI Startup Fund, bringing its Series A funding round to a total of $55 million. This investment underscores OpenAI’s confidence in Adaptive Security’s human-centered approach to combating AI-driven cyber threats like deepfake persona attacks and phishing.
Adaptive Security, a prominent player in AI-powered social engineering prevention, has successfully closed its Series A funding round at an impressive $55 million, thanks to a significant follow-on investment from the OpenAI Startup Fund.
The announcement, made on September 9, 2025, highlights a strategic move by OpenAI, as Adaptive Security remains its sole cybersecurity investment.
Based in New York, NY, Adaptive Security specializes in developing advanced solutions to protect organizations from sophisticated cyber threats, particularly those leveraging artificial intelligence.
The company’s core offerings include protection against deepfake persona attacks, AI-driven phishing campaigns, and multi-channel social engineering threats.
By integrating cutting-edge AI simulations, real-time risk assessment, and comprehensive security training, Adaptive Security empowers businesses to proactively defend against the rapidly evolving landscape of cyber risks.
The continued backing from the OpenAI Startup Fund signals strong confidence in Adaptive Security’s innovative methodology.
This human-centered approach is crucial in an era where AI is increasingly being weaponized by malicious actors.
The $55 million Series A funding will likely fuel Adaptive Security’s research and development efforts, allowing them to further enhance their preventative measures and expand their market reach.
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This investment not only provides Adaptive Security with substantial capital but also validates its position as a leader in the critical domain of AI-powered cybersecurity.
