OpenAI has announced plans to acquire Promptfoo, an AI security platform specialising in testing and identifying vulnerabilities in AI systems during development.
The acquisition is designed to strengthen OpenAI’s enterprise AI capabilities by integrating Promptfoo’s technology into OpenAI Frontier, its platform for building and operating AI coworkers. As organisations increasingly deploy AI agents into real-world workflows, OpenAI said evaluation, security and compliance have become critical requirements. Enterprises are seeking systematic methods to test agent behaviour, detect potential risks prior to deployment and maintain detailed records to support governance, oversight and accountability. Note: The value of the acquisition has not been disclosed.
OpenAI develops advanced AI technologies used by businesses and developers globally, offering tools and platforms that allow organisations to build AI-powered applications and automate workflows. Its enterprise platform, OpenAI Frontier, is designed to help companies build, deploy and manage AI coworkers that operate across business processes.
Promptfoo focuses on helping enterprises evaluate and secure AI systems during development. The company has created tools used to identify vulnerabilities, test model behaviour and improve reliability in large language model (LLM) applications. Its technology is widely adopted across the enterprise sector, with more than 25% of Fortune 500 companies using its tools. The company also maintains a popular open-source command-line interface and library used for evaluating and red-teaming LLM applications.
Following completion of the acquisition, Promptfoo’s security testing and evaluation capabilities will be integrated directly into the OpenAI Frontier platform. This integration aims to embed automated security testing and red-teaming into enterprise AI development workflows, allowing companies to detect risks such as prompt injections, jailbreak attempts, data leaks, tool misuse and other forms of unintended agent behaviour before deployment.
The companies said the platform will also expand oversight and accountability capabilities. Integrated reporting and traceability tools will allow organisations to document testing activity, monitor system changes over time and maintain records needed to meet emerging governance, risk and compliance expectations around enterprise AI systems.
OpenAI added that Promptfoo’s open-source project will continue to be supported while enterprise capabilities are expanded through Frontier.
OpenAI CTO of B2B applications Srinivas Narayanan said, “Promptfoo brings deep engineering expertise in evaluating, securing, and testing AI systems at enterprise scale. Their work helps businesses deploy secure and reliable AI applications, and we’re excited to bring these capabilities directly into Frontier.”
Promptfoo co-founder and CEO Ian Webster said, “We started Promptfoo because developers needed a practical way to secure AI systems. As AI agents become more connected to real data and systems, securing and validating them is more challenging and important than ever. Joining OpenAI lets us accelerate this work, bringing stronger security, safety, and governance capabilities to the teams building real-world AI systems.”
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