US Edition
OpenAI to buy cybersecurity startup Promptfoo to better safeguard AI agents
- On Monday, March 9, 2026 OpenAI announced it acquired Promptfoo, said Promptfoo's team will join, and plans to integrate its technology into Frontier after the deal closes.
- Promptfoo's tools will help Frontier perform automated red-teaming as OpenAI acquired Promptfoo to bolster security for agentic AI, addressing enlarged attack surfaces in production systems exploited by bad actors.
- Promptfoo's user base and funding show more than 125,000 developers, 30-plus Fortune 500 companies, 11 employees, and $22.68 million raised with an $85.50 million valuation as of July 2025.
- OpenAI said it will continue building Promptfoo's open-source project under its current licence while sectors like retail, telecoms, financial services, and media face acute risks, impacting Frontier customers including Uber, State Farm, Intuit, and Thermo Fisher Scientific.
- The acquisition positions OpenAI as a direct entrant into AI application security, folding the toolset into Frontier as rivals like Anthropic launched Claude Code Security in February.
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25 Articles
OpenAI To Acquire AI Security Platform Promptfoo To Strengthen Enterprise Safety and Evaluation Capabilities | 📲 LatestLY
OpenAI has agreed to acquire Promptfoo, an AI security platform used by many Fortune 500 firms. The technology will be integrated into OpenAI Frontier to strengthen testing, red-teaming, and governance of enterprise AI agents. The move aims to help organizations detect risks and ensure safer deployment of large-scale AI systems. 📲 OpenAI To Acquire AI Security Platform Promptfoo To Strengthen Enterprise Safety and Evaluation Capabilities.
The open-source AI red-teaming tool used by Fortune 500 companies is now part of OpenAI
OpenAI is acquiring Promptfoo, the AI red-teaming startup used by 125k developers and 30+ Fortune 500 firms, to strengthen security on its Frontier enterprise agent platform.
OpenAI Acquires Promptfoo To Expand AI Security Testing For Enterprise Agent Platform
OpenAI has announced the acquisition of Promptfoo, a company founded in 2024 to develop tools that identify vulnerabilities in large language models. OpenAI said the startup’s technology will be integrated into its enterprise platform for AI agents after the transaction closes. The acquisition comes as companies deploying autonomous AI systems seek stronger safeguards to prevent manipulation, data exposure, or other security risks. Integration I…
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