Promptfoo

Promptfoo is a company providing an open-source AI red-teaming and security testing framework aimed at protecting developers from AI-related security threats.

OpenAI Acquires Promptfoo to Strengthen AI Agent Security

March 09, 2026

OpenAI has announced plans to acquire Promptfoo, an AI security platform specializing in identifying vulnerabilities in large language models. The technology will be integrated into OpenAI Frontier to enhance automated security testing and governance for enterprise AI agents.

Promptfoo Secures $18.4M to Enhance AI Security

July 30, 2025

Promptfoo has raised $18.4 million in a Series A funding round led by Insight Partners, with participation from Andreessen Horowitz, to bolster its AI security solutions.
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