Palo Alto Networks, Inc.

CybersecurityFounded 2005- HQ today: Santa Clara, California, United States

Founders

Who Founded Palo Alto Networks?

Nir Zuk · Founded 2005 · HQ today: Santa Clara, California, United States

Who founded Palo Alto Networks?

Palo Alto Networks was founded by Nir Zuk in 2005. It is now led by Nikesh Arora.

Founders: Nir Zuk
Founded: 2005
Headquarters: Santa Clara, California, United States
Number of founders: 1
Current CEO: Nikesh Arora (since 2018)

Where was Palo Alto Networks founded?: Palo Alto Networks was founded in Santa Clara, California, United States in 2005.
When was Palo Alto Networks founded?: Palo Alto Networks was founded in 2005.
Who started Palo Alto Networks?: Palo Alto Networks was founded by Nir Zuk.
How old is Palo Alto Networks?: Palo Alto Networks is 21 years old as of 2026.

Founding Story

Nir Zuk, an Israeli engineer who had worked at Check Point and then NetScreen (acquired by Juniper Networks in 2004), founded Palo Alto Networks in 2005. His argument was that port-based firewalls could no longer tell what was actually crossing a network, because most applications and much malware simply used web ports 80 and 443. Palo Alto's answer was a firewall that identified the application (App-ID), the user (User-ID) and the content in a single pass. The first products shipped in 2007, and the company went public on the NYSE in 2012 before moving its listing to Nasdaq in 2021.

Nir Zuk

Background

Nir Zuk served in the Israel Defense Forces' Unit 8200, then worked as an engineer at Check Point Software and later at OneSecure and NetScreen Technologies, which Juniper Networks acquired in 2004.

Role at Palo Alto Networks, Inc.

Nir Zuk is the Israeli-American engineer who founded Palo Alto Networks in 2005 and has served as its chief technology officer. After years building stateful firewalls and intrusion prevention systems at Check Point and NetScreen, he concluded that port-based firewalls could not see modern application traffic. He designed Palo Alto's single-pass architecture, which classifies traffic by application, user and content, and which became known as the next-generation firewall. Nir Zuk was born in 1971.

Palo Alto Networks, Inc.: CEO & Leadership History

Full timeline →

Dipak Golechha

Chief Financial Officer

2021 – Present

As CFO, he manages the incredibly complex financial modeling required to transition the massive legacy hardware company completely into a high-margin, cloud-based software subscription behemoth.

Nikesh Arora

Chairman and Chief Executive Officer

2018 – Present

Since 2018, Arora has led more than a dozen acquisitions, moved the revenue mix toward subscriptions, launched the 2024 platformization strategy and closed the $25 billion CyberArk deal. Revenue has grown from $2.27 billion in fiscal 2018 to $11.48 billion in fiscal 2026.

Mark McLaughlin

Chairman and Chief Executive Officer

2011 – 2018

Serving as CEO from 2011 to 2018, he took the company public and completely established its dominance over legacy rivals like Check Point and Cisco before handing the reins to Nikesh Arora.

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Who Founded Palo Alto Networks? FAQ

Who founded Palo Alto Networks and when was it established?

Palo Alto Networks was founded in 2005 by Nir Zuk, a top Israeli cybersecurity engineer and pioneer of stateful inspection and intrusion prevention technologies.

What was Nir Zuk's technical background before founding Palo Alto Networks?

Nir Zuk served in the IDF's Unit 8200, was an early engineer at Check Point Software, co-founded OneSecure, and became CTO of NetScreen Technologies after it acquired OneSecure. Juniper Networks bought NetScreen in 2004.

Why did Nir Zuk decide to invent the Next-Generation Firewall?

Nir Zuk realized that traditional firewalls were obsolete because modern web applications (like Facebook, Skype, and SaaS apps) bypassed port-based security by tunneling traffic over standard ports 80 and 443. Zuk designed a new firewall architecture capable of inspecting application layer data (Layer 7) in real-time.

What was the Single-Pass Parallel Processing (SP3) architecture invented by Nir Zuk?

Nir Zuk engineered the Single-Pass Parallel Processing (SP3) engine, a hardware/software architecture that performs application identification (App-ID), user identification (User-ID), and threat inspection (Content-ID) simultaneously in a single scan, avoiding catastrophic network latency.

Who were the early venture capital firms that backed Palo Alto Networks?

Palo Alto Networks was backed in its early venture rounds by premier Silicon Valley venture capital firms, led by Greylock Partners (Asheem Chandna) and Sequoia Capital (Jim Goetz), who recognized Nir Zuk's disruptive vision for enterprise network security.

What role does Nir Zuk play at Palo Alto Networks today?

Nir Zuk serves as Founder and Chief Technology Officer (CTO), continuing to guide long-term cybersecurity architecture, advanced threat research, and incubation of disruptive security paradigms.

What was Nir Zuk's early background in Israeli cyber intelligence and Check Point Software?

Nir Zuk served in the Israeli Defense Forces' elite Unit 8200 cyber intelligence corps before joining Check Point Software Technologies in 1994 as an early engineer. At Check Point, Zuk co-invented core stateful inspection technology before moving to the US to launch NetScreen (acquired by Juniper Networks) and founding Palo Alto Networks.

Why was Nir Zuk's relationship with Check Point competitive and controversial?

After leaving Check Point, Zuk believed the company failed to adapt to modern internet threats and relied on obsolete 1990s technology. When launching Palo Alto Networks, Zuk famously placed a billboard along Highway 101 in Silicon Valley stating "Check Point Software... The Security Is Over," sparking one of the tech industry's most famous rivalries.

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