Fastly Next-Gen WAF (Signal Sciences) vs Imperva Web Application Firewall vs Radware Cloud WAF Service

Comparing Fastly Next-Gen WAF (Signal Sciences), Imperva Web Application Firewall and Radware Cloud WAF Service across pricing, features, ease of use, and more. Each WAF has different strengths — the right choice depends on your specific requirements.

View Fastly Next-Gen WAF (Signal Sciences) Review

View Imperva Web Application Firewall Review

View Radware Cloud WAF Service Review

Overview

Fastly Next-Gen WAF (Signal Sciences), Imperva Web Application Firewall and Radware Cloud WAF Service are popular web application firewall solutions. This comparison will help you understand the key differences and choose the right one for your needs.

Fastly Next-Gen WAF (Signal Sciences): Developer-friendly WAF using proprietary SmartParse technology, offering low false positives and seamless DevOps integration for modern application security.

Imperva Web Application Firewall: Enterprise-grade cloud WAF with industry-leading threat research, offering comprehensive application security with advanced bot protection and API security.

Radware Cloud WAF Service: Fully managed cloud WAF combining automatic policy generation, advanced bot mitigation, and 24/7 expert support with industry-leading DDoS protection.

Quick Comparison

Feature	Fastly Next-Gen WAF (Signal Sciences)	Imperva Web Application Firewall	Radware Cloud WAF Service
Overall Rating	4.5/5	4.4/5	4.4/5
Free Tier	No	No	No
Pricing Model	Custom pricing based on requests and features	Custom enterprise pricing	OPEX-based subscription
Ease of Use	4.0/5	3.5/5	3.6/5
Value for Money	3.8/5	3.7/5	3.8/5
Support	4.5/5	4.5/5	4.6/5
Platforms	Any web application, AWS, GCP, Azure, Kubernetes, Docker, Serverless, Nginx, Apache	Any web application, AWS, Azure, GCP, Kubernetes, on-premise	Any web application, AWS, Azure, GCP, Kubernetes, on-premises
Compliance	SOC 2 Type II, PCI DSS, ISO 27001, HIPAA, GDPR	SOC 2, PCI DSS, HIPAA, ISO 27001, ISO 27017, ISO 27018	SOC 2, PCI DSS, ISO 27001, HIPAA
Best For	Modern DevOps teams, API-heavy applications, organizations frustrated with false positives, companies needing flexible deployment options	Large enterprises, organizations with sophisticated security requirements, companies needing advanced bot management, regulated industries	Mid-market to enterprise organizations, companies needing integrated WAF and DDoS, hybrid cloud environments, organizations valuing managed services

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

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Imperva Web Application Firewall

Model: Custom enterprise pricing

Pro

Starting ~$59/month

Business

Starting ~$299/month

Enterprise

Custom pricing

View full pricing →

Radware Cloud WAF Service

Model: OPEX-based subscription

Standard

Custom pricing

Advanced

Custom pricing

Premium

Custom pricing

View full pricing →

Features Comparison

Fastly Next-Gen WAF (Signal Sciences)

SmartParse Technology
Intelligent parsing technology that understands application context to reduce false positives by 90%+.
Power Rules
Flexible rule language for creating custom detection and response logic based on any request attribute.
API Discovery
Automatic discovery and cataloging of API endpoints with security assessment.
DevOps Integration
Native integrations with CI/CD tools, infrastructure as code support, and developer-friendly APIs.
Multi-Environment Deployment
Deploy as cloud service, agent, or edge module across diverse infrastructure.
Real-Time Dashboards
Live visibility into attacks, decisions, and application health without sampling.

Imperva Web Application Firewall

Advanced Bot Protection
Machine learning-powered bot detection that distinguishes between legitimate users, good bots, and malicious automation.
API Security
Discover, classify, and protect APIs with schema validation, anomaly detection, and positive security model.
Account Takeover Protection
Detect and prevent credential stuffing and account takeover attacks using behavioral analysis.
Client-Side Protection
Monitor and protect against client-side attacks like Magecart, formjacking, and supply chain compromises.
Attack Analytics
AI-powered analysis of security events to identify attack campaigns and reduce alert fatigue.
Virtual Patching
Immediate protection against known vulnerabilities while you work on permanent fixes.

Radware Cloud WAF Service

Automatic Policy Generation
Patented technology automatically creates and optimizes security policies for new applications.
Positive and Negative Security
Combines signature-based detection with positive security model for comprehensive protection.
Bot Manager
Advanced bot detection using behavioral analysis, device fingerprinting, and CAPTCHA challenges.
API Protection
Discover and protect APIs with schema validation, rate limiting, and anomaly detection.
DDoS Protection
Integrated network and application layer DDoS mitigation backed by Radware''s global scrubbing network.
Geo-Fencing
Block or allow traffic based on geographic location with granular country-level controls.

Our Verdict

Fastly Next-Gen WAF (Signal Sciences), Imperva Web Application Firewall and Radware Cloud WAF Service are all capable web application firewalls that can protect your applications from common threats.

Key considerations:

Fastly Next-Gen WAF (Signal Sciences) is well-suited for: Modern DevOps teams, API-heavy applications, organizations frustrated with false positives, companies needing flexible deployment options
Imperva Web Application Firewall is well-suited for: Large enterprises, organizations with sophisticated security requirements, companies needing advanced bot management, regulated industries
Radware Cloud WAF Service is well-suited for: Mid-market to enterprise organizations, companies needing integrated WAF and DDoS, hybrid cloud environments, organizations valuing managed services

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

Frequently Asked Questions

Which is the cheapest: Fastly Next-Gen WAF (Signal Sciences) or Imperva Web Application Firewall or Radware Cloud WAF Service?

None of these providers offer a free tier. Contact each vendor for pricing.

Which WAF is easiest to set up?

Fastly Next-Gen WAF (Signal Sciences) has the highest ease of use rating at 4.0/5 in our review.

Which WAF has the highest overall rating?

Fastly Next-Gen WAF (Signal Sciences) leads with an overall rating of 4.5/5.