Island vs Zscaler
Side-by-side comparison of AI visibility scores, market position, and capabilities
Island built the first enterprise browser with built-in security, DLP, and governance; raised $250M Series E at ~$5B valuation (Mar 2025) with $730M total; serves 450 enterprise customers including Mattress Firm and Swiss Life.
About
Island is a Dallas, Texas-based cybersecurity company that developed the Enterprise Browser — a Chromium-based web browser purpose-built for enterprise security, compliance, and IT governance. Founded to address the reality that nearly all enterprise work now happens in the browser, Island''s platform provides security and control at the browser layer: including data loss prevention (DLP), web filtering, session recording for compliance, application access control, and identity integration — without requiring VPNs, SASE solutions, or endpoint agents for many use cases.
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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