OpenAI Acquires Promptfoo to Enhance AI Security

OpenAI announced the acquisition of cybersecurity startup Promptfoo on March 9, 2026, to bolster the security of its AI agents. Promptfoo, founded in 2024, specializes in tools designed to protect large language models from online threats. The integration of Promptfoo's technology into OpenAI's Frontier platform aims to address the growing challenges of securing AI systems as they become more interconnected with real-world data.