Fastly Next-Gen WAF (Signal Sciences) vs Imperva Web Application Firewall
Fastly Next-Gen WAF (Signal Sciences) edges out in this comparison, offering Modern DevOps teams, API-heavy applications, organizations frustrated with false positives, companies needing flexible deployment options. However, Imperva Web Application Firewall may be better suited if Large enterprises, organizations with sophisticated security requirements, companies needing advanced bot management, regulated industries.
Overview
Fastly Next-Gen WAF (Signal Sciences) and Imperva Web Application Firewall 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-grade cloud WAF with industry-leading threat research, offering comprehensive application security with advanced bot protection and API security.
Quick Comparison
| Feature | Fastly Next-Gen WAF (Signal Sciences) | Imperva Web Application Firewall |
|---|---|---|
| Overall Rating | 4.5/5 | 4.4/5 |
| Free Tier | No | No |
| Pricing Model | Custom pricing based on requests and features | Custom enterprise pricing |
| Ease of Use | 4.0/5 | 3.5/5 |
| Value for Money | 3.8/5 | 3.7/5 |
| Support | 4.5/5 | 4.5/5 |
| Platforms | Any web application, AWS, GCP, Azure, Kubernetes, Docker, Serverless, Nginx, Apache | Any web application, AWS, Azure, GCP, Kubernetes, on-premise |
| Compliance | SOC 2 Type II, PCI DSS, ISO 27001, HIPAA, GDPR | SOC 2, PCI DSS, HIPAA, ISO 27001, ISO 27017, ISO 27018 |
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
Imperva Web Application Firewall
Model: Custom enterprise pricing
Pro
Starting ~$59/month
Business
Starting ~$299/month
Enterprise
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.
Imperva Web Application Firewall
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Advanced Bot Protection
Machine learning-powered bot detection that distinguishes between legitimate users, good bots, and malicious automation.
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API Security
Discover, classify, and protect APIs with schema validation, anomaly detection, and positive security model.
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Account Takeover Protection
Detect and prevent credential stuffing and account takeover attacks using behavioral analysis.
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Client-Side Protection
Monitor and protect against client-side attacks like Magecart, formjacking, and supply chain compromises.
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Attack Analytics
AI-powered analysis of security events to identify attack campaigns and reduce alert fatigue.
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Virtual Patching
Immediate protection against known vulnerabilities while you work on permanent fixes.
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
Imperva Web Application Firewall
- You need: Large enterprises, organizations with sophisticated security requirements, companies needing advanced bot management, regulated industries
- You're using: Any web application, AWS, Azure, GCP, Kubernetes, on-premise
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 Imperva Web Application Firewall?
Imperva Web Application Firewall has a higher support rating (4.5/5) compared to Fastly Next-Gen WAF (Signal Sciences) (4.5/5). 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: Fastly Next-Gen WAF (Signal Sciences) or Imperva Web Application Firewall?
Fastly Next-Gen WAF (Signal Sciences) scores higher for ease of use (4.0/5) versus Imperva Web Application Firewall (3.5/5). The actual implementation effort depends on your existing infrastructure and team expertise.
Which is more cost-effective: Fastly Next-Gen WAF (Signal Sciences) or Imperva Web Application Firewall?
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 Imperva Web Application Firewall?
Both Fastly Next-Gen WAF (Signal Sciences) and Imperva Web Application Firewall support AWS deployments. 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 Imperva Web Application Firewall?
Imperva Web Application Firewall 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.