Zscaler runs internet access (ZIA) and private access (ZPA) as a cloud-native SASE platform inspected at the edge, not backhauled to a data center. For the enterprise CISO tearing out legacy web proxies and VPN concentrators, Zscaler is usually the platform every other SASE vendor gets compared to. That market position is the reason to brief it — and the reason to brief alternatives alongside it.
Zscaler proxies user traffic through its own cloud, inspects it inline, and applies policy before traffic reaches the internet or an internal app. ZIA handles the secure web gateway and SWG/CASB side; ZPA brokers zero-trust access to private apps without putting users on the network. The architecture is the point: there is no on-prem appliance doing the inspection, which is what makes it attractive for distributed workforces — and what makes the platform decision a strategic one rather than a box swap.
Large, distributed workforce, a data-center-backhaul architecture you want gone, and the scale to justify a platform commitment.
If removing flat-network VPN access is a board-level objective, ZPA is a mature, well-understood path to private-app zero trust.
Zscaler is powerful but enterprise-shaped. A network-native option like Cloudflare One may be quicker to stand up. Worth comparing.
If you want SD-WAN and SASE converged in a single stack, Versa Networks is shaped for that. Brief Versa instead.