OpenAI to acquire Promptfoo
OpenAI announced it will acquire Promptfoo, an AI security platform that helps enterprises find and fix vulnerabilities in AI systems during development. The acquisition will integrate Promptfoo’s technology into OpenAI Frontier, the platform for building and operating AI coworkers. Promptfoo’s tools are used by over 25% of Fortune 500 companies and include an open‑source CLI and library for evaluating and red‑teaming LLM applications. The integration will add automated security testing, red‑teaming, and integrated reporting to Frontier, aiming to make security a core part of enterprise AI development and compliance. The deal is subject to customary closing conditions.
The Core Development
We’re acquiring Promptfoo, an AI security platform that helps enterprises identify and remediate vulnerabilities in AI systems during development. Once the acquisition is finalized we will integrate Promptfoo’s technology directly into OpenAI Frontier, our platform for building and operating AI coworkers.
As enterprises deploy AI coworkers into real workflows, evaluation, security, and compliance become foundational requirements. Enterprises need systematic ways to test agent behavior, detect risks before deployment, and maintain clear records to support oversight, governance, and accountability over time.
The Promptfoo team, led by Ian Webster and Michael D’Angelo, has built a powerful suite of tools trusted by over 25 percent of Fortune 500 companies, along with a widely used open-source (opens in a new window) CLI and library for evaluating and red-teaming LLM applications. Together, we will continue building the open-source project while also advancing the integrated enterprise capabilities within Frontier.
Strategic Perspective & Ecosystem Impact
We will build on several core capabilities for enterprises building agents on Frontier:
Security and safety testing built into the platform: Automated security testing and red-teaming capabilities will become a native part of the Frontier platform, helping enterprises identify and remediate risks like prompt injections, jailbreaks, data leaks, tool misuse, and out-of-policy agent behaviors.
Security and evaluation integrated in development workflows: Frontier will deeply integrate with the workflows needed to identify, investigate, and remediate agent risks earlier, making security a core part of how enterprise AI systems are developed and operated.
Why it matters
The move strengthens OpenAI’s focus on secure AI deployment, addressing growing concerns about AI safety and compliance in enterprise settings. It also signals a broader industry trend toward integrating security tools directly into AI development platforms.