Coraza Web Application Firewall vs Zscaler Internet Access (ZIA) WAF

Coraza Web Application Firewall and Zscaler Internet Access (ZIA) WAF take different approaches to web application security. Consider your team's expertise and infrastructure preferences when evaluating these options.

View Coraza Web Application Firewall Review View Zscaler Internet Access (ZIA) WAF Review

Coraza Web Application Firewall and Zscaler Internet Access (ZIA) WAF take fundamentally different approaches to web application security. Understanding your infrastructure and team capabilities will help determine which approach fits your needs.

Overview

Coraza Web Application Firewall and Zscaler Internet Access (ZIA) WAF are both popular web application firewall solutions. This comparison will help you understand the key differences and choose the right one for your needs.

OWASP open source WAF written in Go, fully compatible with ModSecurity rules and OWASP Core Rule Set, designed as a modern alternative to ModSecurity with native support for Caddy, Traefik, and HAProxy.

Enterprise zero trust security platform with integrated cloud WAF capabilities as part of Zscaler Internet Access. Inspects all traffic including encrypted SSL/TLS at cloud scale.

Quick Comparison

Feature	Coraza Web Application Firewall	Zscaler Internet Access (ZIA) WAF
Overall Rating	4.2/5	3.8/5
Free Tier	Yes	No
Pricing Model	Free and open source (Apache 2.0)	Per user / Annual subscription
Ease of Use	3.8/5	3.2/5
Value for Money	4.8/5	3.0/5
Support	3.5/5	4.0/5
Open Source	Yes	No
Platforms	Any platform running Go, Docker, Kubernetes, Linux, macOS, Windows	Cloud (SaaS)
Compliance	Supports PCI DSS compliance when configured with OWASP CRS	SOC 2, ISO 27001, FedRAMP, HIPAA, PCI DSS, GDPR

Pricing Comparison

Coraza Web Application Firewall

Model: Free and open source (Apache 2.0)

Free Tier Available

Open Source

Free

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Zscaler Internet Access (ZIA) WAF

Model: Per user / Annual subscription

ZIA Business

Custom pricing

ZIA Transformation

Custom pricing

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Features Comparison

Coraza Web Application Firewall

ModSecurity Compatibility
Full compatibility with ModSecurity SecLang rule language. Existing ModSecurity rules and rule sets work without modification.
OWASP CRS Support
Native support for the OWASP Core Rule Set, providing protection against SQL injection, XSS, RCE, and other OWASP Top 10 threats.
Go Native
Pure Go implementation with no C dependencies. Embeddable as a library, usable as middleware, or deployable as a plugin for modern proxies.
Proxy Plugins
Official plugins for Caddy (coraza-caddy), Traefik, and HAProxy allow adding WAF protection with minimal configuration.
Kubernetes Ready
Lightweight enough to run as a sidecar or embedded in ingress controllers. Works with any Go-based K8s tooling.
Audit Logging
Detailed audit logging of blocked and flagged requests for security analysis and compliance reporting.

Zscaler Internet Access (ZIA) WAF

Inline WAF Protection
Inspects web traffic inline for OWASP Top 10 threats as part of the broader ZIA security stack.
Full SSL/TLS Inspection
Decrypts, inspects, and re-encrypts all encrypted traffic at cloud scale without performance degradation.
AI-Powered Threat Detection
Machine learning models analyze traffic patterns to detect zero-day threats and advanced attacks.
Cloud Firewall
Stateful inspection firewall for all ports and protocols, extending protection beyond HTTP/S traffic.
Centralized Policy Management
Single console for global security policy enforcement across 150+ data centers.
Zero Trust Architecture
Identity-based access control ensuring users only reach authorized applications regardless of location.

Which One Is Right for You?

The best WAF depends on your specific requirements, infrastructure, and team expertise.

Coraza Web Application Firewall

You need: Teams migrating from ModSecurity, Kubernetes environments, Go-based applications, organizations using Caddy or Traefik, developers wanting embeddable WAF
You want to start with a free tier
You prefer open-source solutions
You're using: Any platform running Go, Docker, Kubernetes, Linux, macOS, Windows

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Zscaler Internet Access (ZIA) WAF

You need: Large enterprises adopting zero trust, organizations wanting a single vendor for all web security, companies with distributed workforces needing consistent global security policy
You're using: Cloud (SaaS)

Learn more →

We recommend evaluating both options with a trial or free tier before committing. Consider your existing infrastructure, team expertise, compliance requirements, and budget.

Frequently Asked Questions

Which is better for startups: Coraza Web Application Firewall or Zscaler Internet Access (ZIA) WAF?

Coraza Web Application Firewall offers a free tier while Zscaler Internet Access (ZIA) WAF does not, which may be important for early-stage startups. Coraza Web Application Firewall scores higher for ease of use (3.8/5), which is valuable for smaller teams. Consider your immediate security needs and growth plans when choosing.

Which has better support: Coraza Web Application Firewall or Zscaler Internet Access (ZIA) WAF?

Zscaler Internet Access (ZIA) WAF has a higher support rating (4.0/5) compared to Coraza Web Application Firewall (3.5/5). However, support quality can vary based on your plan tier - enterprise customers typically receive more responsive support from both providers. Consider evaluating support during a trial period.

Which is easier to implement: Coraza Web Application Firewall or Zscaler Internet Access (ZIA) WAF?

Coraza Web Application Firewall scores higher for ease of use (3.8/5) versus Zscaler Internet Access (ZIA) WAF (3.2/5). The actual implementation effort depends on your existing infrastructure and team expertise.

Which is more cost-effective: Coraza Web Application Firewall or Zscaler Internet Access (ZIA) WAF?

Coraza Web Application Firewall offers a free tier while Zscaler Internet Access (ZIA) WAF requires a paid plan. Coraza Web Application Firewall scores higher for value (4.8/5). Total cost depends on your traffic volume, required features, and support level needs.

Which is better for enterprise: Coraza Web Application Firewall or Zscaler Internet Access (ZIA) WAF?

Zscaler Internet Access (ZIA) WAF is positioned for enterprise use cases, while Coraza Web Application Firewall may be more suited for small to mid-market organizations. Both offer compliance certifications important for enterprise. Enterprise buyers should evaluate SLAs, support options, and integration capabilities.