Armis Founders Join Backers as AI-Era Cybersecurity Startup Pi Raises $25 Million
American-Israeli cybersecurity company Pi has raised $25 million in a Series A round led by Third Point Ventures. To date, the company, which is being revealed today, has raised about $35 million, including a $10 million seed round in early 2025 led by Brightmind Partners. The financing also included CrowdStrike CEO George Kurtz and Armis founders Yevgeny Dibrov and Nadir Izrael.
Pi was founded in 2025 by Guy Arzi, who serves as CEO, and Yoni Ramon, chief product officer. The two come from the worlds of security research and offensive security, with experience protecting systems at scale. Before founding the company, Arzi worked as a security researcher at Microsoft, where he developed defense mechanisms and vulnerability detection for Microsoft Defender, Azure and MSRC. Earlier, he was part of the team that built XCloud at Palo Alto Networks.
Ramon led offensive security activity at Tesla for more than a decade, where he oversaw security projects for the company’s vehicles and robots in the United States, Europe and China. He also gained systems engineering experience at SpaceX and was involved in projects at other companies owned by Elon Musk, including during the acquisition of Twitter. The company has offices in San Francisco and Tel Aviv and employs about 23 people.
Pi’s platform works like a security engineer with deep knowledge of an organization’s development environment, from design documents, code and cloud infrastructure to professional discussions and decisions made in Slack and Teams, along with prior security incidents and how they were handled. This broader context enables it to distinguish between vulnerabilities that pose a real risk and false alarms, something code-only tools cannot do.
Guy Arzi, CEO and co-founder of Pi, said, “If the world’s strongest and most well-resourced organizations are still chasing the same recurring vulnerabilities in their code and infrastructure, then there is still no real solution to this problem.”
