OpenAI Acquires Promptfoo To Secure Its AI Agents

OpenAI Acquires Promptfoo To Secure Its AI Agents

OpenAI Acquires Promptfoo to Lock Down AI Agents — And It's a Big Deal for Enterprise Security AI agents are getting smarter, faster, and more autonomous — but are they safe enough to trust with your business? OpenAI is betting yes, and it just spent to prove it. The company announced Monday that it has acquired Promptfoo, an AI security startup built to protect large language models from online adversaries. The move signals a major shift in how frontier AI labs are approaching enterprise trust and safety in 2026. What Is Promptfoo and Why Did OpenAI Want It? Promptfoo was founded in 2024 by Ian Webster and Michael D'Angelo with one clear mission: help companies find and fix security vulnerabilities in AI systems before bad actors do. The startup built both an open-source interface and a commercial library that organizations can use to stress-test their large language models against real-world attack scenarios. The numbers behind Promptfoo are quietly impressive. Despite raising o…