Palo Alto Networks started as a firewall company and is now one of the largest cybersecurity vendors in the world by revenue and market value. It was worth about $306 billion in late September 2026. Its products fall into three groups: network and AI security (firewalls, Prisma SASE, Prisma AIRS), security operations (Cortex XDR, XSIAM and Cortex Cloud), and identity security (Idira, built on CyberArk). Unit 42 provides threat intelligence and incident response. Customers include large enterprises and government agencies worldwide. The company is headquartered in Santa Clara, California. Palo Alto Networks was founded in 2005 in Santa Clara, California, by cybersecurity inventor Nir Zuk to create the world's first Next-Generation Firewall (NGFW), transforming under CEO Nikesh Arora into the premier multi-platform cybersecurity titan spanning network security (Strata), cloud security (Prisma), and AI security operations (Cortex).
Palo Alto Networks makes most of its money from recurring subscriptions and support, with the rest from firewall products. Customers buy hardware and virtual next-generation firewalls and then pay yearly for threat prevention, URL filtering, DNS security and SD-WAN services. The faster-growing part is Next-Generation Security: Prisma SASE and Prisma AIRS for cloud and AI security, Cortex XDR, XSIAM and Cloud for security operations, and, since the February 2026 CyberArk deal, the Idira identity and privileged-access platform. Sales run mainly through channel partners, distributors and cloud marketplaces, and large customers often sign multi-year platform contracts. That model gave the company $21.2 billion of remaining performance obligations at July 31, 2026.