OpenAI to acquire Promptfoo to strengthen AI agent security testing

OpenAI is acquiring Promptfoo, a company that builds testing tools for AI applications, to improve security checks for AI agents (autonomous systems that operate independently in business processes) as more companies deploy them in production. Promptfoo's tools test AI models against adversarial prompts (malicious inputs designed to trick the AI), including prompt injection (hiding instructions in user input to manipulate the AI) and jailbreak attempts, and check whether models follow safety guidelines. The acquisition reflects growing enterprise concern about AI vulnerabilities and a shift toward treating AI security testing as an essential part of AI development, similar to traditional application security practices.