OpenAI acquires Promptfoo to secure its AI agents

In Brief

OpenAI announced Monday it has acquired Promptfoo, an AI information startup founded successful 2024 to support LLMs from online adversaries.

The frontier laboratory said successful a blog post that erstwhile the woody closes, Promptfoo’s exertion volition beryllium integrated into OpenAI Frontier, its endeavor level for AI agents.

The improvement of autarkic AI agents that execute integer tasks has generated excitement astir productivity gains. But it’s besides fixed atrocious actors caller opportunities to entree delicate information oregon manipulate automated systems. This woody underscores however frontier labs are scrambling to beryllium their exertion tin beryllium utilized safely successful captious concern operations.

Promptfoo was founded by Ian Webster and Michael D’Angelo to make tools that companies tin usage to trial information vulnerabilities successful LLMs, including an open-source interface and library. The institution reports that its products are utilized by much than 25% of Fortune 500 companies.

Promptfoo has raised conscionable $23 cardinal since its founding, and was valued astatine $86 cardinal aft its astir caller circular successful July 2025, according to Pitchbook. OpenAI did not disclose the worth of the transaction.

OpenAI’s station said Promptfoo’s exertion volition let its cause level to execute automated red-teaming, measure agentic workflows for information concerns, and show activities for risks and compliance needs. The institution besides said it expects to proceed gathering retired Promptfoo’s open-source offering.

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