Cybersecurity

Greylock has partnered with some of the most consequential cybersecurity companies of each generation, including Palo Alto Networks, Okta, Wiz, and Abnormal AI.

Building security for an AI-native world demands deep security expertise and a native understanding of how models reason and behave. Greylock is partnering with founders at that intersection to build what comes next.

NIR ZUK // PALO ALTO NETWORKS

The global cybersecurity leader.

Nir Zuk founded Palo Alto Networks in 2005 to reinvent the firewall. At a time when network security meant dozens of separate appliances, each solving a narrow problem, he proposed a single platform that could see and secure all application traffic. He started the company from a desk at Greylock, where the original architecture was first sketched on a whiteboard. Today, Palo Alto Networks is the world's largest independent cybersecurity company, a member of the S&P 500, and trusted by over 70,000 organizations worldwide.

EVAN REISER & SANJAY JEYAKUMAR // ABNORMAL AI

The behavior platform for protecting humans.

In 2018, the cybersecurity industry was focused on securing infrastructure while attackers had shifted to exploiting people. Email had become the primary vector for sophisticated social engineering. Evan Reiser and Sanjay Jeyakumar initiated Abnormal at Greylock's offices, applying data science to model human behavior and detect attacks that legacy tools could not. Today, Abnormal is one of the fastest-growing cybersecurity companies in the world, protecting over 3,000 organizations across 35 countries.

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