OpenAI has announced its plans to acquire Promptfoo, an established AI security platform widely used by enterprises to identify and remediate vulnerabilities in AI systems during development. The company confirmed that once the acquisition is finalized, Promptfoo’s technology will be integrated directly into OpenAI Frontier, the platform designed for building and operating AI coworkers. The move reflects OpenAI’s growing focus on strengthening evaluation, security, and compliance capabilities as enterprises increasingly deploy AI agents into real‑world workflows.
According to OpenAI, organizations adopting AI coworkers require systematic methods to test agent behavior, detect risks before deployment, and maintain transparent records to support oversight and governance. Promptfoo, led by co‑founders Ian Webster and Michael D’Angelo, has built a suite of tools trusted by more than a quarter of Fortune 500 companies. Its open‑source CLI and library for evaluating and red‑teaming large language model applications have become widely used across the industry. OpenAI stated that it will continue supporting the open‑source project while expanding enterprise‑grade capabilities within Frontier.
Srinivas Narayanan, CTO of B2B Applications at OpenAI, said the acquisition brings deep engineering expertise in evaluating and securing AI systems at scale. He noted that Promptfoo’s work enables businesses to deploy secure and reliable AI applications, and integrating these capabilities into Frontier will strengthen the platform’s native security features. OpenAI highlighted that the integration will introduce automated security testing and red‑teaming directly into Frontier, enabling enterprises to identify risks such as prompt injections, jailbreaks, data leaks, tool misuse, and out‑of‑policy agent behaviors.
The company also emphasized that security and evaluation will be embedded into development workflows, allowing teams to identify, investigate, and remediate risks earlier in the lifecycle. Enhanced reporting and traceability will support governance, risk management, and compliance requirements as AI oversight expectations continue to rise globally.
Promptfoo CEO Ian Webster said the company was founded to give developers practical tools to secure AI systems, noting that the increasing connectivity of AI agents to real data and systems makes validation more critical than ever. He added that joining OpenAI will accelerate efforts to deliver stronger security, safety, and governance capabilities for teams building real‑world AI applications. The acquisition remains subject to customary closing conditions.
