Palo Alto Networks is an American multinational cybersecurity company with headquarters in Santa Clara, California. The company serves over 70,000 organizations in over 150 countries, including 85 of the Fortune 100. Its core product is a platform that includes advanced firewalls and cloud-based offerings that extend those firewalls to cover other aspects of security. Palo Alto Networks was founded in 2005 by Nir Zuk.