OpenAI has officially acquired Promptfoo, a cutting-edge AI security startup founded in 2024, signaling a major step toward safeguarding the next generation of AI agents. The startup’s technology is expected to be integrated into OpenAI Frontier, the company’s enterprise platform designed for autonomous AI agents.
The rise of independent AI agents capable of performing complex digital tasks has generated excitement for productivity gains, but it has also created new risks. Malicious actors can exploit these systems to access sensitive information or manipulate automated workflows. OpenAI’s acquisition of Promptfoo highlights the company’s commitment to ensuring that AI agents operate safely in critical business environments.
Founded by Ian Webster and Michael D’Angelo, Promptfoo specializes in testing security vulnerabilities in large language models (LLMs). Its tools include an open-source interface and library, which have already been adopted by over 25% of Fortune 500 companies, demonstrating significant trust from leading enterprises.
Since its inception, Promptfoo has raised $23 million and was valued at $86 million following its latest funding round in July 2025, according to PitchBook. While OpenAI did not disclose the financial terms of the deal, the strategic value of Promptfoo’s technology is clear, particularly for enterprise clients relying on secure AI operations.
OpenAI plans to leverage Promptfoo’s solutions to perform automated red-teaming, evaluate AI agent workflows for potential risks, and monitor compliance across its platform. The company also intends to continue developing Promptfoo’s open-source offerings, ensuring broader access to AI security tools for the industry.
source: techcrunch