--- title: OpenAI to acquire Promptfoo to strengthen AI agent... description: OpenAI is acquiring Promptfoo, an AI testing startup whose tools are used by over 25% of Fortune 500 companies to evaluate LLM applications against adversarial... canonical: https://daily.dev/posts/openai-to-acquire-promptfoo-to-strengthen-ai-agent-security-testing-bsjor15hu twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: OpenAI to acquire Promptfoo to strengthen AI agent security testing | daily.dev og:description: OpenAI is acquiring Promptfoo, an AI testing startup whose tools are used by over 25% of Fortune 500 companies to evaluate LLM applications against adversarial... og:url: https://daily.dev/posts/openai-to-acquire-promptfoo-to-strengthen-ai-agent-security-testing-bsjor15hu og:image: https://api.daily.dev/og/posts/BsJoR15Hu.png og:image:alt: OpenAI to acquire Promptfoo to strengthen AI agent security testing og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # OpenAI to acquire Promptfoo to strengthen AI agent security testing **[CSO Online](https://daily.dev/sources/csoonline)** · 3 min read · 0 upvotes · 0 comments ## Summary OpenAI is acquiring Promptfoo, an AI testing startup whose tools are used by over 25% of Fortune 500 companies to evaluate LLM applications against adversarial prompts, prompt injection, and jailbreak attempts. Promptfoo's technology will be integrated into OpenAI Frontier, its enterprise AI agent platform. The deal reflects growing enterprise demand for security and governance tooling as AI agents move from pilots to production. Analysts note that red-teaming and evaluation tools are becoming baseline requirements, with organizations adopting shift-left security practices for AI similar to traditional application security pipelines. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [AI Chatbot Evaluation and Observability with Promptfoo and Langfuse](https://daily.dev/posts/ai-chatbot-evaluation-and-observability-with-promptfoo-and-langfuse-rccwse2wk) · Netguru · 0 upvotes · 0 comments - [Testing AI prompts and comparing models with promptfoo](https://daily.dev/posts/testing-ai-prompts-and-comparing-models-with-promptfoo-mxhomphpc) · Tim Deschryver · 1 upvotes · 1 comments - [The security hole that every enterprise AI deployment has \(but nobody looks for\)](https://daily.dev/posts/the-security-hole-that-every-enterprise-ai-deployment-has-but-nobody-looks-for--6ov42cfiy) · The New Stack · 2 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#openai](https://daily.dev/tags/openai), [#ai-security](https://daily.dev/tags/ai-security), [#red-teaming](https://daily.dev/tags/red-teaming) [View this post on daily.dev](https://daily.dev/posts/openai-to-acquire-promptfoo-to-strengthen-ai-agent-security-testing-bsjor15hu) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"OpenAI to acquire Promptfoo to strengthen AI agent security testing","url":"https://daily.dev/posts/openai-to-acquire-promptfoo-to-strengthen-ai-agent-security-testing-bsjor15hu","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/openai-to-acquire-promptfoo-to-strengthen-ai-agent-security-testing-bsjor15hu"},"datePublished":"2026-03-10T09:42:50.530Z","dateModified":"2026-03-10T15:42:30.595Z","description":"OpenAI is acquiring Promptfoo, an AI testing startup whose tools are used by over 25% of Fortune 500 companies to evaluate LLM applications against adversarial...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e693fde161a1df40dad2567b70c24186?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e693fde161a1df40dad2567b70c24186?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"CSO Online","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"CSO Online","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/98667e4b5cac46cf9c470819c6cf71cd","url":"https://daily.dev/sources/csoonline"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/openai-to-acquire-promptfoo-to-strengthen-ai-agent-security-testing-bsjor15hu","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"llm,openai,ai-security,red-teaming","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"CSO Online","item":"https://daily.dev/sources/csoonline"},{"@type":"ListItem","position":3,"name":"OpenAI to acquire Promptfoo to strengthen AI agent security testing"}]} ```