NAXSI vs StackPath Web Application Firewall
NAXSI and StackPath Web Application Firewall take different approaches to web application security. Consider your team's expertise and infrastructure preferences when evaluating these options.
NAXSI and StackPath Web Application Firewall take fundamentally different approaches to web application security. Understanding your infrastructure and team capabilities will help determine which approach fits your needs.
Overview
NAXSI and StackPath 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.
A lightweight, open source WAF module for NGINX that uses a scoring-based approach instead of signature matching, blocking attacks by detecting suspicious patterns rather than maintaining a vulnerability database.
Edge-based WAF that was part of StackPath's CDN and edge computing platform. Discontinued in June 2024 when the company shut down operations.
Quick Comparison
| Feature | NAXSI | StackPath Web Application Firewall |
|---|---|---|
| Overall Rating | 3.4/5 | 1.0/5 |
| Free Tier | Yes | No |
| Pricing Model | Free (Open Source, GPLv3) | Per site / Per bandwidth tier (discontinued) |
| Ease of Use | 2.8/5 | 1.0/5 |
| Value for Money | 4.5/5 | 1.0/5 |
| Support | 2.5/5 | 1.0/5 |
| Open Source | Yes | No |
| Platforms | NGINX, Linux (Debian, Ubuntu, CentOS), FreeBSD, OpenBSD, NetBSD, Docker | Cloud (SaaS, discontinued) |
| Compliance | N/A (supports OWASP Top 10 protection patterns) | SOC 2, PCI DSS (historical) |
Pricing Comparison
StackPath Web Application Firewall
Model: Per site / Per bandwidth tier (discontinued)
Edge Delivery 200
$27.50/month
Edge Delivery 2000
$275/month
Features Comparison
NAXSI
-
Scoring-Based Detection
Assigns scores to suspicious patterns in requests. Blocks when the cumulative score exceeds a threshold, rather than relying on exact signature matches.
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Learning Mode
Monitors traffic and automatically generates whitelist rules for legitimate application behavior, reducing manual tuning effort during initial deployment.
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Virtual Patching
Apply custom rules to block specific vulnerabilities without modifying application code. Rules target raw requests or specific fields like headers, args, and body.
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Deny-by-Default
Operates like a DROP firewall. Common attack characters and patterns are blocked unless explicitly whitelisted for the target application.
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Lightweight Footprint
Written in C with only libpcre as a dependency. Adds minimal overhead to NGINX request processing.
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Dynamic Module Support
Can be compiled as a dynamic NGINX module, allowing it to be loaded without recompiling NGINX from source.
StackPath Web Application Firewall
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Edge WAF
Application-layer firewall deployed at the edge, filtering traffic before it reached origin servers. Included OWASP Top 10 coverage and custom rule support.
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DDoS Protection
Volumetric and application-layer DDoS mitigation integrated with the CDN edge network.
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Bot Management
Bot detection and mitigation using behavioral analysis and challenge-based verification.
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Real-time Analytics
Dashboard showing traffic patterns, blocked requests, and attack trends across protected sites.
Which One Is Right for You?
The best WAF depends on your specific requirements, infrastructure, and team expertise.
NAXSI
- You need: Teams already running NGINX who want lightweight inline WAF protection, budget-conscious deployments, applications with predictable request patterns, virtual patching use cases
- You want to start with a free tier
- You prefer open-source solutions
- You're using: NGINX, Linux (Debian, Ubuntu, CentOS), FreeBSD, OpenBSD, NetBSD, Docker
StackPath Web Application Firewall
- You need: Historical reference only. StackPath is no longer available.
- You're using: Cloud (SaaS, discontinued)
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: NAXSI or StackPath Web Application Firewall?
NAXSI offers a free tier while StackPath Web Application Firewall does not, which may be important for early-stage startups. NAXSI scores higher for ease of use (2.8/5), which is valuable for smaller teams. Consider your immediate security needs and growth plans when choosing.
Which has better support: NAXSI or StackPath Web Application Firewall?
NAXSI has a higher support rating (2.5/5) compared to StackPath Web Application Firewall (1.0/5). 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: NAXSI or StackPath Web Application Firewall?
NAXSI scores higher for ease of use (2.8/5) versus StackPath Web Application Firewall (1.0/5). The actual implementation effort depends on your existing infrastructure and team expertise.
Which is more cost-effective: NAXSI or StackPath Web Application Firewall?
NAXSI offers a free tier while StackPath Web Application Firewall requires a paid plan. NAXSI scores higher for value (4.5/5). Total cost depends on your traffic volume, required features, and support level needs.
What's the difference between NAXSI (open source) and StackPath Web Application Firewall (commercial)?
NAXSI is open source, which means you can inspect the code, customize it, and self-host without licensing fees. StackPath Web Application Firewall is a commercial solution with managed support and regular updates. Open source is ideal if you have in-house expertise and want full control. Commercial solutions are better if you prefer managed security with vendor support.