Fastly Next-Gen WAF (Signal Sciences) vs open-appsec

Fastly Next-Gen WAF (Signal Sciences) and open-appsec take different approaches to web application security. Consider your team's expertise and infrastructure preferences when evaluating these options.

View Fastly Next-Gen WAF (Signal Sciences) Review View open-appsec Review

Fastly Next-Gen WAF (Signal Sciences) and open-appsec 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 open-appsec 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.

Machine learning-based open source WAF that uses contextual AI to detect threats without signatures or rules, with native integration for NGINX, Kong, Envoy, and Kubernetes ingress controllers.

Quick Comparison

Feature	Fastly Next-Gen WAF (Signal Sciences)	open-appsec
Overall Rating	4.5/5	4.1/5
Free Tier	No	Yes
Pricing Model	Custom pricing based on requests and features	Free open source, managed cloud SaaS available
Ease of Use	4.0/5	4.3/5
Value for Money	3.8/5	4.6/5
Support	4.5/5	3.7/5
Open Source	No	Yes
Platforms	Any web application, AWS, GCP, Azure, Kubernetes, Docker, Serverless, Nginx, Apache	Docker, Kubernetes, Linux, NGINX, Kong Gateway, Envoy
Compliance	SOC 2 Type II, PCI DSS, ISO 27001, HIPAA, GDPR	Supports OWASP Top 10 and API Top 10 protection

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

View full pricing →

open-appsec

Model: Free open source, managed cloud SaaS available

Free Tier Available

Open Source

Free

SaaS Management

Free tier available, paid plans for higher traffic

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.

open-appsec

ML-Based Detection
Pre-trained machine learning engine detects threats based on context and intent, not signatures. No rule tuning required.
Automatic Learning
Continuously learns application-specific traffic patterns in production, reducing false positives over time without manual intervention.
Native Proxy Integration
Runs as a module inside NGINX, Kong, or Envoy rather than as a separate proxy, eliminating additional network hops and latency.
Kubernetes Ingress
Functions as a Kubernetes Ingress Controller with built-in WAF, providing security at the ingress layer without sidecars or service mesh.
API Protection
Protects REST APIs against OWASP API Top 10 threats using the same ML engine, with automatic API discovery and schema enforcement.
Anti-Bot
Detects and mitigates automated attacks, credential stuffing, and web scraping using behavioral analysis.

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

Learn more →

open-appsec

You need: Kubernetes environments, teams using NGINX or Kong, organizations wanting hands-off WAF protection, cloud-native applications, DevOps teams that do not want to manage WAF rules
You want to start with a free tier
You prefer open-source solutions
You're using: Docker, Kubernetes, Linux, NGINX, Kong Gateway, Envoy

Learn more →

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 open-appsec?

open-appsec offers a free tier while Fastly Next-Gen WAF (Signal Sciences) does not, making open-appsec more accessible for budget-conscious startups. open-appsec scores higher for ease of use (4.3/5), which is valuable for smaller teams. Consider your immediate security needs and growth plans when choosing.

Which has better support: Fastly Next-Gen WAF (Signal Sciences) or open-appsec?

Fastly Next-Gen WAF (Signal Sciences) has a higher support rating (4.5/5) compared to open-appsec (3.7/5). 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 open-appsec?

open-appsec scores higher for ease of use (4.3/5) 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 open-appsec?

open-appsec offers a free tier while Fastly Next-Gen WAF (Signal Sciences) requires a paid plan. open-appsec scores higher for value (4.6/5). 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 open-appsec?

Fastly Next-Gen WAF (Signal Sciences) explicitly supports AWS while open-appsec's AWS integration may vary. Consider whether native AWS integration or cross-cloud portability matters more for your use case.