Who is Zscaler?
Zscaler is a cloud-delivered security and networking vendor whose platform is used by enterprises to provide secure access to applications and internet resources from any location or device.
- Zero trust network access and secure remote connectivity for users and workloads.
- Cloud-delivered Secure Web Gateway (SWG) and internet access security (web, URL, and content controls).
- Cloud firewall and intrusion prevention services for outbound and east-west traffic inspection.
- Cloud-based digital experience monitoring and analytics for user-to-application performance.
- Data protection services including Cloud Access Security Broker (CASB) and inline Data Loss Prevention (DLP).
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More About Zscaler
Zscaler provides a multi-tenant, cloud-delivered security platform that enterprises use to connect users, devices, and workloads to applications based on zero trust principles rather than traditional network perimeter models. Instead of backhauling traffic to centralized data centers, organizations direct user and branch traffic to Zscaler’s globally distributed cloud, where security controls, policy enforcement, and routing decisions are applied before connecting to internet destinations or private applications.
The company’s secure access offerings are commonly classified in categories such as SWG, zero trust network access (ZTNA), and cloud firewall (network security). These services inspect traffic at Layer 7, apply URL filtering and content inspection, enforce user and application-aware policies, and integrate with identity providers using Security Assertion Markup Language (SAML), OAuth, and related authentication protocols. TLS/SSL inspection is a core capability for visibility into encrypted traffic, with enterprises deploying Zscaler connectors, agents, or GRE/IPsec tunnels from branch locations, Software-Defined Wide Area Network (SD-WAN) devices, and endpoints to steer flows to the cloud security service.
In a zero trust access scenario, users authenticate to the Zscaler platform, which then brokers connections to approved applications without placing users on the corporate network. This approach differs from traditional Virtual Private Network (VPN) models and is used to segment access, reduce lateral movement, and align with modern zero trust reference architectures. Zscaler integrates with directory services and identity and access management tools to apply role-based controls and conditional access policies across Software-as-a-Service (SaaS), internet, and private applications.
Zscaler also offers data protection capabilities that fall into categories such as CASB and DLP. These services analyze content in motion and at rest in sanctioned SaaS platforms to enforce corporate data handling policies, control sharing, and detect sensitive data patterns. Inline CASB controls can block or coach user actions in real time, while API-based integrations with SaaS platforms support post-event inspection and remediation.
For observability, Zscaler provides digital experience monitoring (DEM) tools that measure user-to-application performance across last-mile networks, Wi‑Fi, ISPs, and the Zscaler cloud itself. These capabilities are used by IT teams to troubleshoot performance issues, correlate degradation with specific network segments, and optimize routing or policy decisions. The platform exposes APIs, logging integrations, and Security Information and Event Management (SIEM) connectors so Security Operations (SecOps) and network operations teams can incorporate Zscaler telemetry into broader monitoring and incident response workflows.
Within an enterprise IT directory or marketplace, Zscaler can be categorized under network security, zero trust network access, SWG, cloud firewall, data protection (CASB and DLP), and digital experience monitoring. Its offerings are typically deployed in conjunction with identity providers, endpoint security tools, SD-WAN platforms, and public cloud environments as part of broader Secure Access Service Edge (SASE) or zero trust architectures.
Our description of Zscaler. Updated December 2025.
