Fastly Next-Gen WAF (Signal Sciences) vs Shield Security
Fastly Next-Gen WAF (Signal Sciences) and Shield Security take different approaches to web application security. Consider your team's expertise and infrastructure preferences when evaluating these options.
Fastly Next-Gen WAF (Signal Sciences) and Shield Security take fundamentally different approaches to web application security. Understanding your infrastructure and team capabilities will help determine which approach fits your needs.
Overview
Fastly Next-Gen WAF (Signal Sciences) and Shield Security 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.
WordPress security plugin with SilentCAPTCHA bot detection, automatic IP blocking, firewall rules, and activity logging designed for hands-off, automated protection.
Quick Comparison
| Feature | Fastly Next-Gen WAF (Signal Sciences) | Shield Security |
|---|---|---|
| Overall Rating | 4.5/5 | 3.8/5 |
| Free Tier | No | Yes |
| Pricing Model | Custom pricing based on requests and features | Freemium (Free tier + annual ShieldPRO license) |
| Ease of Use | 4.0/5 | 4.0/5 |
| Value for Money | 3.8/5 | 4.0/5 |
| Support | 4.5/5 | 3.8/5 |
| Open Source | No | Yes |
| Platforms | Any web application, AWS, GCP, Azure, Kubernetes, Docker, Serverless, Nginx, Apache | WordPress (self-hosted) |
| Compliance | SOC 2 Type II, PCI DSS, ISO 27001, HIPAA, GDPR | Contact vendor |
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
Shield Security
Model: Freemium (Free tier + annual ShieldPRO license)
Free Tier AvailableFree
$0
ShieldPRO (1 site)
$99/year (~$8.25/month)
ShieldPRO (agency)
From $249/year
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.
Shield Security
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SilentCAPTCHA
Proprietary invisible bot detection that identifies automated threats without showing challenges to visitors.
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AntiBot Detection Engine
Behavioral analysis engine that identifies and blocks malicious bots based on activity patterns.
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Automatic IP Blocking
Builds reputation scores for visitors and automatically blocks IPs that exhibit malicious behavior patterns.
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Firewall Rules
Protection against SQL injection, XSS, directory traversal, and other common WordPress attack vectors.
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Activity Log
Comprehensive log of all security events, user actions, and blocked threats for auditing.
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Traffic Rate Limiting
Controls request rates to prevent brute force attacks and resource exhaustion (ShieldPRO feature).
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
Shield Security
- You need: WordPress site owners wanting automated hands-off security, sites plagued by bot traffic and automated attacks, agencies using MainWP for site management
- You want to start with a free tier
- You prefer open-source solutions
- You're using: WordPress (self-hosted)
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: Fastly Next-Gen WAF (Signal Sciences) or Shield Security?
Shield Security offers a free tier while Fastly Next-Gen WAF (Signal Sciences) does not, making Shield Security more accessible for budget-conscious startups. Consider your immediate security needs and growth plans when choosing.
Which has better support: Fastly Next-Gen WAF (Signal Sciences) or Shield Security?
Fastly Next-Gen WAF (Signal Sciences) has a higher support rating (4.5/5) compared to Shield Security (3.8/5). 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 Shield Security?
Shield Security scores higher for ease of use (4.0/5) versus Fastly Next-Gen WAF (Signal Sciences) (4.0/5). The actual implementation effort depends on your existing infrastructure and team expertise.
Which is more cost-effective: Fastly Next-Gen WAF (Signal Sciences) or Shield Security?
Shield Security offers a free tier while Fastly Next-Gen WAF (Signal Sciences) requires a paid plan. Shield Security scores higher for value (4.0/5). 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 Shield Security?
Fastly Next-Gen WAF (Signal Sciences) explicitly supports AWS while Shield Security's AWS integration may vary. Consider whether native AWS integration or cross-cloud portability matters more for your use case.