OpenAI announces the acquisition of Promptfoo, an AI security platform that helps companies detect and fix vulnerabilities in AI systems during development. The Promptfoo technology will be integrated directly into OpenAI Frontier, the platform for building and operating AI coworkers, once the deal closes.
Why should you care? If your team runs AI in production, safety and compliance stop being optional — and this move is meant to address that head-on.
What OpenAI announced
The purchase aims to solve a practical problem: when companies deploy AI agents in real workflows, evaluation, security and compliance become mandatory. OpenAI says Promptfoo brings tools to test agent behavior, spot risks before deployment, and keep clear records for oversight and governance.
Promptfoo, led by Ian Webster and Michael D'Angelo, is already used by more than 25 percent of Fortune 500 companies and maintains a popular CLI and open-source library for evaluating and red-teaming applications built on large language models.
