OpenAI continues to complete its industrial map: Announces the acquisition of cybersecurity startup Promptfoo to enhance AI agent security.

OpenAI announced the acquisition of cybersecurity startup Promptfoo on Monday. Promptfoo offers tools for protecting and testing complex artificial intelligence systems. The company, led by Sam Altman, did not disclose the terms of the deal but stated that Promptfoo's team will join OpenAI. Promptfoo's security tools will be integrated into OpenAI's artificial intelligence agent platform Frontier. Promptfoo CEO Ian Webster stated in a statement, "As artificial intelligence agents become increasingly connected to real data and systems, protecting and verifying them is more challenging and important than ever. Joining OpenAI will allow us to accelerate this work, bringing stronger security, assurance, and governance capabilities to teams building real-world artificial intelligence systems." OpenAI also stated that it will continue to develop Promptfoo's popular open-source project, which allows developers to test various AI-related prompts and agents and compare the performance of large language models like ChatGPT, Anthropic's Claude, and Google's Gemini. In recent months, OpenAI has been continuously acquiring startups and hiring tech executives in the fiercely competitive AI market, competing against companies like Anthropic, Google, and Meta. In January of this year, OpenAI reportedly acquired healthcare tech startup Torch for around $60 million. Prior to that, in October of last year, OpenAI announced the acquisition of startup Software Applications, which developed an AI interface named Sky for Apple Mac users. In February of this year, OpenAI hired Peter Steinberger, the creator of the popular OpenClaw tool used by developers to create AI agents. Altman posted on the X forum at the time, saying, "He is a genius with many amazing ideas about how future intelligent agents can collaborate with each other and provide practical services to people. We expect this to quickly become the core of our product." Promptfoo announced the completion of its Series A funding in July, raising $18.4 million, with Insight Partners leading the round and Silicon Valley venture capital firm Andreessen Horowitz also participating. According to data from the transaction tracking platform Pitchbook, the startup has 11 employees and had raised a total of $22.68 million by July 2025, with a valuation of $85.5 million. Andreessen Horowitz has been actively expanding into infrastructure and defense markets and announced in January of this year that it had raised $15 billion through the "American Dynamism" project. The venture capital firm stated that $6.75 billion from this funding will be allocated to a growth fund, with an additional $1.7 billion fund each focusing on applications and infrastructure.