Anthropic工程师都离不开！深夜随手撸出的开源神器，被OpenAl高价收购，23人创业逆袭

Core Insights - OpenAI has acquired Promptfoo to enhance the security of its AI agents, integrating Promptfoo's technology into the OpenAI Frontier platform [2][10] - Promptfoo, founded in 2024, focuses on protecting large language models from cyber attacks and has rapidly gained traction among developers and Fortune 500 companies [4][9] - The acquisition aims to strengthen automated security testing and risk management capabilities for AI applications [11][15] Company Overview - Promptfoo is a San Francisco-based startup with 23 employees, co-founded by Ian Webster and Michael D'Angelo, who have extensive experience in AI and security [4][5] - The company developed an open-source tool for testing AI system security, which has been adopted by over 35,000 developers and 25% of Fortune 500 companies [9][12] Technology and Functionality - Promptfoo's platform simulates automated attacks on AI applications to identify vulnerabilities, addressing risks such as prompt injection and data leakage [7][11] - The platform operates through a chat interface or API, allowing it to directly interact with clients' AI applications [7] Financials and Growth - Since its inception, Promptfoo has raised a total of $23 million, with a recent valuation of $86 million following a $18.4 million Series A funding round [8][12] - The company has seen rapid adoption, with significant usage among major corporations and developers prior to its acquisition [9] Future Directions - Post-acquisition, Promptfoo will maintain its open-source status and continue to support existing clients while enhancing security features within the OpenAI Frontier platform [10][12] - OpenAI aims to position Frontier as a comprehensive solution for enterprises to integrate AI safely into their operations [11][15]