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ByNN Desk
OpenAI to Acquire Promptfoo, an AI Security Testing Platform
OpenAI has announced the acquisition of Promptfoo, an AI security platform that helps enterprises identify and fix vulnerabilities in AI systems before they reach production.
Promptfoo’s red-teaming and evaluation tools, trusted by over 25% of Fortune 500 companies, will be integrated directly into OpenAI Frontier, the platform for building and operating enterprise AI coworkers.
OpenAI has announced the acquisition of Promptfoo, an AI security platform that helps enterprises identify and fix vulnerabilities in AI systems before they reach production. The deal, pending customary closing conditions, will see Promptfoo’s technology folded into OpenAI Frontier, OpenAI’s platform for building and operating enterprise AI coworkers.
Promptfoo was founded by Ian Webster and Michael D’Angelo and has built a suite of tools that covers automated security testing, red-teaming, and evaluation of LLM applications. Its open-source CLI and library have accumulated a significant developer following, and the platform is currently used by over 25% of Fortune 500 companies. The acquisition keeps the open-source project alive while bringing the enterprise-grade capabilities natively into Frontier.
“As AI agents become more connected to real data and systems, securing and validating them is more challenging and important than ever.”
Ian Webster, Co-Founder & CEO, Promptfoo
The strategic logic is straightforward. As enterprises push AI agents into live workflows, connecting them to real data, tools, and decision-making processes, the attack surface grows. Prompt injections, jailbreaks, data leaks, tool misuse, and out-of-policy agent behaviours are all failure modes that become harder to catch as agent systems grow more complex. Promptfoo’s tooling is designed to surface those risks systematically, during development rather than after deployment.
Three capabilities will be built into Frontier following the acquisition: security and safety testing as a native platform feature, security evaluation integrated directly into development workflows, and oversight and accountability tooling that helps enterprises document testing, track changes, and meet AI governance and compliance requirements.
Srinivas Narayanan, CTO of B2B Applications at OpenAI, described the acquisition as directly additive to what enterprises need from Frontier. “Their work helps businesses deploy secure and reliable AI applications, and we’re excited to bring these capabilities directly into Frontier,” he said.
The acquisition reflects a broader shift in enterprise AI priorities. Evaluation and security, which were once afterthoughts bolted onto AI deployments, are becoming baseline requirements, particularly as regulatory pressure around AI governance increases and as the consequences of agentic failures in production grow more visible. Promptfoo’s position at the intersection of open-source adoption and enterprise tooling made it a clear fit for a platform like Frontier that needs to serve both developer communities and compliance-driven procurement teams.
Disclaimer: This article is based on an announcement published by OpenAI on March 10, 2026. Quotes are reproduced directly from the source. The acquisition is subject to customary closing conditions and has not yet been finalised.
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