Zscaler

Zscaler pioneered zero trust network access (ZTNA) — the security architecture that assumes every user and device is potentially compromised regardless of network location — and has built a $4.5B annual revenue business serving 8,600+ enterprise customers on this principle. Its platform routes 360 billion transactions daily through its 150-point-of-presence cloud network, replacing the traditional perimeter firewall model that broke down when COVID-19 made remote work universal overnight. Zscaler's ZIA (Internet Access) and ZPA (Private Access) products are now the standard for zero trust deployment among US government agencies and defense contractors, mandated by CISA's zero trust guidance. The company commands a $30B market cap and is growing 20%+ annually.