Caddy vs Zscaler

What Caddy is

Caddy is a web server that obtains and renews TLS certificates automatically, with a configuration file most people can read.

What Zscaler is

Zscaler is a proprietary cloud security platform. Zscaler Internet Access inspects and controls user traffic to internet and SaaS destinations, while Zscaler Private Access brokers identity- and policy-based access to private applications without placing users on the application network. Current platform bundles and standalone products are quote based; entitlements differ by user count, edition, add-ons, App Connectors, application segments, isolation traffic, branch throughput or endpoints and specialized workloads. ZIA and ZPA solve different traffic paths and should not be treated as one universal VPN replacement license.

What Zscaler is built to do

Zscaler Internet Access

Applies secure-web, firewall, threat and data policies to internet and SaaS traffic.

Zscaler Private Access

Connects authorized users to private applications through App Connectors and policy, not general network admission.

Client and branch forwarding

Routes supported endpoint, branch and workload traffic to the appropriate Zscaler service.

Identity and API controls

Uses SAML and administrative APIs for contextual policy and lifecycle automation.

Choose Caddy if

• Anyone who wants a correctly configured HTTPS server without ceremony.

Choose Zscaler if

• Distributed workforces needing consistent internet and SaaS inspection
• Private applications that can be segmented and published through redundant connectors
• Enterprises able to pilot traffic, identity, certificate inspection, logs and business continuity by region

Skip Zscaler if

• A small team needs a simple commodity VPN without enterprise policy infrastructure
• Applications require unsupported protocols or broad layer-3 network access not covered by the chosen package
• The project has not budgeted deployment services, add-ons, log pipelines and connector infrastructure

Caddy: pros & cons

• HTTPS configured correctly by default
• Configuration is short and legible
• Single binary, easy to deploy
• Smaller community than nginx
• Fewer third-party guides
• Some advanced setups need plugins

Zscaler: pros & cons

• Direct-to-cloud security: Internet controls can follow users without backhauling every session through a corporate perimeter.
• Application-level private access: ZPA policies can grant access to named applications rather than broad network reach.
• Identity integration: SAML attributes and multiple identity-provider options support contextual user policy.
• Administration APIs: Product APIs support automation for application segments, connectors, policy and tenant resources.
• No public transactional price: User mix, bundle, geography, traffic and add-ons require a negotiated design and quote.
• Deployment is not agent-only: Traffic forwarding, Client Connector, App Connectors, DNS, identity, certificates and logging need coordinated rollout.
• Entitlements have ceilings: Bundles can cap connectors, segments, isolation traffic or included privileged-access systems.
• Service availability is not application availability: Identity, endpoint, network, connector and target application failures remain outside the cloud service itself.