Top 10 Best Cloud Access Security Broker (CASB) Solutions in 2026

Bottom line up front: almost nobody buys a standalone CASB anymore it’s a function of a secure web gateway/SSE platform, and increasingly overlaps with SSPM for SaaS posture. Netskope leads on depth, Microsoft Defender for Cloud Apps on Microsoft-estate economics, and the real decision is which SSE platform you’re standardizing on. This guide sizes it by deployment mode and fit. CASB isn’t one thing; it’s four enforcement points, and vendors differ on which they do well. The buying test: most estates need API for SaaS posture + inline (forward for managed, reverse for BYOD) for real-time control. A CASB strong in only one mode leaves a documented gap. Stage 2 — CASB, SSE, or SSPM? • CASB governs access to and data in sanctioned and unsanctioned…