The deal would integrate Promptfoo’s AI security and testing tools into OpenAI’s platform to help companies evaluate and safeguard complex AI systems.
OpenAI announced that it has agreed to acquire Promptfoo, a developer platform that provides tools for testing, evaluating, and securing AI systems used in enterprise applications.
According to an announcement from OpenAI, the acquisition would bring Promptfoo’s testing and red-teaming capabilities into OpenAI Frontier, a platform used by organizations to deploy and manage AI agents. The company said the technology will help enterprises identify vulnerabilities and evaluate how AI systems behave before deployment in production environments.
Promptfoo provides software that allows developers to systematically test prompts and model outputs, run adversarial security tests, and measure whether AI systems follow policies and safety rules. Its tools detect risks such as prompt injection attacks, data leakage, policy violations, and unintended agent behavior.
The platform has gained significant enterprise adoption. Promptfoo said its evaluation and red-teaming tools are used by teams at more than 25% of Fortune 500 companies, and more than 350,000 developers have used the software to test AI systems.
OpenAI said integrating Promptfoo’s capabilities into Frontier will enable developers to automate security testing and evaluation as part of the development process for AI agents, helping organizations monitor system behavior and document compliance with governance and risk requirements.
“Promptfoo brings deep engineering expertise in evaluating, securing, and testing AI systems at enterprise scale,” said Srinivas Narayanan, CTO of B2B Applications at OpenAI. “Their work helps businesses deploy secure and reliable AI applications, and we’re excited to bring these capabilities directly into Frontier.”
“We started Promptfoo because developers needed a practical way to secure AI systems,” Ian Webster, CEO of Promptfoo, said. “As AI agents become more connected to real data and systems, securing and validating them is more challenging and important than ever.”
OpenAI said the Promptfoo team will join the company once the transaction closes. Financial terms of the acquisition were not disclosed.
