Illumio vs Zscaler
Side-by-side comparison of AI visibility scores, market position, and capabilities
Illumio is a zero trust segmentation platform that maps application dependencies and enforces workload-level policy to contain breaches across cloud, data center, and endpoints.
About
Illumio is a cybersecurity company headquartered in Sunnyvale, California that pioneered the zero trust segmentation category — providing visibility into application communication flows and enforcing workload-level micro-segmentation policies across hybrid cloud, data center, and endpoint environments to limit the lateral movement that makes ransomware and supply chain attacks so damaging. Founded in 2013, Illumio raised $225 million in a 2021 Series F that valued the company at $2.75 billion, reflecting enterprise demand for segmentation technology as a breach containment control independent of network perimeter tools. The company's core thesis is that breaches are inevitable and that security programs must invest in preventing attackers who have entered the environment from moving freely to reach high-value targets.
San Jose zero trust security (NASDAQ: ZS) surpassing $3B ARR FY2025; 500B+ daily transactions across 160+ data centers for 8,650+ enterprises and 35% Forbes Global 2000 competing with Palo Alto Prisma for enterprise zero trust.
About
Zscaler is a San Jose, California-based cloud security company — publicly traded on NASDAQ (NASDAQ: ZS) at approximately $30 billion market capitalization — operating the world's largest security cloud, the Zscaler Zero Trust Exchange, that processes 500+ billion daily transactions across 160+ data centers globally. In fiscal year 2025 (ended July 31, 2025), Zscaler surpassed $3 billion in annual recurring revenue (ARR) with Q4 FY2025 revenue of $719.2 million (21% year-over-year growth), serving 8,650+ enterprise customers including 35% of the Forbes Global 2000. The platform's flagship products — Zscaler Internet Access (ZIA, secure web gateway), Zscaler Private Access (ZPA, zero trust network access), and Zscaler Digital Experience (ZDX, application performance monitoring) — have eliminated traditional VPN and network perimeter architectures for thousands of enterprises. Founded in 2007 by CEO Jay Chaudhry (serial security entrepreneur who built and sold four prior security companies); IPO March 2018.
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