Cloud access security brokers sit between users and cloud applications to enforce security policy, providing visibility into application use, access control, data protection, and threat detection across sanctioned and unsanctioned services. The buyers are security teams, cloud security architects, and compliance leaders governing software-as-a-service adoption across the organization. Selection usually turns on the balance of inline and application programming interface enforcement, shadow IT discovery, data protection depth, integration with identity and security service edge platforms, supported applications, and the pricing model. The category has largely converged into broader security service edge and SASE suites, with standalone brokers becoming rare. Because CASB overlaps with data loss prevention and secure web gateway functions, scoping the deployment model matters. Listings are independent of vendor funding.
Cloud access security brokers give security teams control over how the organization uses cloud applications, addressing the visibility gap created by rapid software-as-a-service adoption. The market has consolidated: most CASB capability now ships inside security service edge and SASE platforms rather than as a standalone product. Buyers should weigh the mix of inline proxy enforcement, which controls data in real time, and API-based enforcement, which inspects data already in cloud applications, since each model covers a different set of risks. Discovery of unsanctioned applications, often called shadow IT, is a further point of comparison, since the size of that visibility gap varies widely between platforms.
Among the consolidated platforms, Netskope CASB and Microsoft Defender for Cloud Apps appear on most shortlists; our Zscaler vs Netskope and Cloudflare One vs Netskope analyses cover the leading platform decisions. The main limitation across the category is coverage gaps and complexity: inline enforcement can break application features or add latency, API enforcement depends on each vendor's connector quality, and managed-application coverage varies widely, so buyers should confirm support for their specific application portfolio.
Convergence into SASE and a shift toward identity-driven, context-aware policy are the dominant 2026 trends as standalone CASB fades. Buyers should test enforcement against their own application set rather than rely on vendor benchmarks. For scenario shortlists, see our best cybersecurity for enterprise ranking, or browse the software directory.
Tell us what you're evaluating and we'll send a tailored shortlist of vendors that actually fit — no vendor funding, no pay-to-play.
6,000+ vendors · 893 comparisons · 48 country guides · Independent & vendor-neutral