Fastly Next-Gen WAF (Signal Sciences) vs Zscaler Internet Access (ZIA) WAF
Both Fastly Next-Gen WAF (Signal Sciences) and Zscaler Internet Access (ZIA) WAF are capable WAF solutions. The right choice depends on your specific infrastructure, budget, and feature requirements.
Overview
Fastly Next-Gen WAF (Signal Sciences) 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.
Developer-friendly WAF using proprietary SmartParse technology, offering low false positives and seamless DevOps integration for modern application security.
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 | Fastly Next-Gen WAF (Signal Sciences) | Zscaler Internet Access (ZIA) WAF |
|---|---|---|
| Overall Rating | 4.5/5 | 3.8/5 |
| Free Tier | No | No |
| Pricing Model | Custom pricing based on requests and features | Per user / Annual subscription |
| Ease of Use | 4.0/5 | 3.2/5 |
| Value for Money | 3.8/5 | 3.0/5 |
| Support | 4.5/5 | 4.0/5 |
| Platforms | Any web application, AWS, GCP, Azure, Kubernetes, Docker, Serverless, Nginx, Apache | Cloud (SaaS) |
| Compliance | SOC 2 Type II, PCI DSS, ISO 27001, HIPAA, GDPR | SOC 2, ISO 27001, FedRAMP, HIPAA, PCI DSS, GDPR |
Pricing Comparison
Fastly Next-Gen WAF (Signal Sciences)
Model: Custom pricing based on requests and features
Essential
Custom pricing
Professional
Custom pricing
Premier
Custom pricing
Zscaler Internet Access (ZIA) WAF
Model: Per user / Annual subscription
ZIA Business
Custom pricing
ZIA Transformation
Custom pricing
Features Comparison
Fastly Next-Gen WAF (Signal Sciences)
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SmartParse Technology
Intelligent parsing technology that understands application context to reduce false positives by 90%+.
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Power Rules
Flexible rule language for creating custom detection and response logic based on any request attribute.
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API Discovery
Automatic discovery and cataloging of API endpoints with security assessment.
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DevOps Integration
Native integrations with CI/CD tools, infrastructure as code support, and developer-friendly APIs.
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Multi-Environment Deployment
Deploy as cloud service, agent, or edge module across diverse infrastructure.
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Real-Time Dashboards
Live visibility into attacks, decisions, and application health without sampling.
Zscaler Internet Access (ZIA) WAF
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Inline WAF Protection
Inspects web traffic inline for OWASP Top 10 threats as part of the broader ZIA security stack.
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Full SSL/TLS Inspection
Decrypts, inspects, and re-encrypts all encrypted traffic at cloud scale without performance degradation.
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AI-Powered Threat Detection
Machine learning models analyze traffic patterns to detect zero-day threats and advanced attacks.
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Cloud Firewall
Stateful inspection firewall for all ports and protocols, extending protection beyond HTTP/S traffic.
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Centralized Policy Management
Single console for global security policy enforcement across 150+ data centers.
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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.
Fastly Next-Gen WAF (Signal Sciences)
- You need: Modern DevOps teams, API-heavy applications, organizations frustrated with false positives, companies needing flexible deployment options
- You're using: Any web application, AWS, GCP, Azure, Kubernetes, Docker, Serverless, Nginx, Apache
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)
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 has better support: Fastly Next-Gen WAF (Signal Sciences) or Zscaler Internet Access (ZIA) WAF?
Fastly Next-Gen WAF (Signal Sciences) has a higher support rating (4.5/5) compared to Zscaler Internet Access (ZIA) WAF (4.0/5). 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: Fastly Next-Gen WAF (Signal Sciences) or Zscaler Internet Access (ZIA) WAF?
Fastly Next-Gen WAF (Signal Sciences) scores higher for ease of use (4.0/5) 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: Fastly Next-Gen WAF (Signal Sciences) or Zscaler Internet Access (ZIA) WAF?
Neither provider offers a completely free tier. Fastly Next-Gen WAF (Signal Sciences) scores higher for value (3.8/5). Total cost depends on your traffic volume, required features, and support level needs.
Which works better with AWS: Fastly Next-Gen WAF (Signal Sciences) or Zscaler Internet Access (ZIA) WAF?
Fastly Next-Gen WAF (Signal Sciences) explicitly supports AWS while Zscaler Internet Access (ZIA) WAF's AWS integration may vary. Consider whether native AWS integration or cross-cloud portability matters more for your use case.
Which is better for enterprise: Fastly Next-Gen WAF (Signal Sciences) or Zscaler Internet Access (ZIA) WAF?
Zscaler Internet Access (ZIA) WAF is positioned for enterprise use cases, while Fastly Next-Gen WAF (Signal Sciences) 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.