Kong Gateway WAF vs Solid Security (formerly iThemes Security)
Kong Gateway WAF and Solid Security (formerly iThemes Security) take different approaches to web application security. Consider your team's expertise and infrastructure preferences when evaluating these options.
Kong Gateway WAF and Solid Security (formerly iThemes Security) take fundamentally different approaches to web application security. Understanding your infrastructure and team capabilities will help determine which approach fits your needs.
Overview
Kong Gateway WAF and Solid Security (formerly iThemes 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.
API gateway with built-in WAF plugin for enterprise customers. Kong is the most popular open source API gateway (35K+ GitHub stars, 312M+ downloads) built on NGINX, processing 400B+ API calls daily. The WAF plugin is an Enterprise-only add-on that protects API endpoints at the gateway layer.
Comprehensive WordPress security plugin with Patchstack-powered firewall rules, virtual patching, two-factor authentication, and site scanning for proactive protection.
Quick Comparison
| Feature | Kong Gateway WAF | Solid Security (formerly iThemes Security) |
|---|---|---|
| Overall Rating | 3.8/5 | 4.1/5 |
| Free Tier | No | Yes |
| Pricing Model | Tiered (Plus per-gateway + Enterprise custom) | Freemium (Free tier + annual Pro license) |
| Ease of Use | 3.2/5 | 4.3/5 |
| Value for Money | 3.0/5 | 4.2/5 |
| Support | 4.2/5 | 4.0/5 |
| Open Source | No | Yes |
| Platforms | Linux (Ubuntu, RHEL, Debian, Amazon Linux, Alpine), Docker, Kubernetes (via Ingress Controller and Operator), AWS, Azure, GCP, ARM64, macOS (dev) | WordPress (self-hosted) |
| Compliance | SOC 2 Type II, FIPS 140-2 (Enterprise data planes), supports PCI DSS and HIPAA compliance | Contact vendor |
Pricing Comparison
Kong Gateway WAF
Model: Tiered (Plus per-gateway + Enterprise custom)
Kong Gateway OSS
Free
Kong Konnect Plus
From $225/mo
Kong Konnect Enterprise
Custom (annual)
Dedicated Cloud Gateway
$500/mo per control plane + $0.15/GB
Solid Security (formerly iThemes Security)
Model: Freemium (Free tier + annual Pro license)
Free Tier AvailableFree
$0
Pro (1 site)
$99/year (~$8.25/month)
Pro (multi-site)
From $199/year
Features Comparison
Kong Gateway WAF
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Gateway-Embedded WAF
WAF runs as a plugin inside the Kong Gateway process, inspecting API traffic at the same layer where routing, authentication, and rate limiting occur. No separate WAF appliance or additional proxy hop needed.
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OWASP Top 10 Protection
Built-in protection against common web application attacks including SQL injection, cross-site scripting, command injection, and path traversal at the API gateway layer.
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Plugin Ecosystem
Over 100 plugins for security, traffic control, authentication, and observability. WAF works alongside bot detection, IP restriction, CORS, ACL, and rate limiting plugins in a configurable execution chain.
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Third-Party WAF Integrations
Open plugin architecture supports third-party WAF engines including open-appsec (ML-driven detection) and Wallarm (API security). Teams can choose the WAF engine that fits their threat model.
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Kubernetes-Native Deployment
Kong Ingress Controller and Kong Kubernetes Operator provide native Kubernetes integration. WAF policies can be managed declaratively through Kubernetes CRDs alongside gateway configuration.
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Hybrid Mode
Cloud-managed control plane with self-hosted data planes. WAF policies are centrally managed and distributed to data planes running in any environment, including air-gapped networks.
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AI Gateway
Dedicated AI gateway capabilities including LLM proxy, token-based rate limiting, semantic caching, PII sanitization, prompt guardrails, and MCP server proxy. WAF protects AI endpoints alongside traditional APIs.
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Declarative Configuration
Gateway and WAF configuration can be managed as code through declarative YAML/JSON, enabling GitOps workflows and CI/CD pipeline integration for security policy changes.
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Advanced Rate Limiting
Enterprise-grade rate limiting with sliding window counters, consumer groups, and cluster-wide synchronization. Works in conjunction with WAF to prevent both application-layer attacks and abuse.
Solid Security (formerly iThemes Security)
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Patchstack Firewall
Virtual patching rules powered by Patchstack that protect against known plugin and theme vulnerabilities automatically.
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Two-Factor Authentication
Multiple 2FA methods including authenticator apps, email codes, and backup codes for all user roles.
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Passwordless Login
Login via passkeys and biometrics, eliminating password-based attacks entirely (Pro feature).
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Site Scanner
Checks for known malware, vulnerabilities in plugins and themes, and blocklist status.
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File Change Detection
Monitors WordPress core files and alerts when unexpected changes are detected.
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Security Dashboard
Unified dashboard showing security status, recent events, and actionable recommendations.
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Trusted Devices
Recognizes trusted devices and restricts admin access from unknown devices (Pro feature).
Which One Is Right for You?
The best WAF depends on your specific requirements, infrastructure, and team expertise.
Kong Gateway WAF
- You need: Organizations already using Kong as their API gateway, Kubernetes-native architectures needing gateway-level WAF, teams wanting unified API management and security in one platform, enterprises with microservices architectures routing all traffic through an API gateway
- You're using: Linux (Ubuntu, RHEL, Debian, Amazon Linux, Alpine), Docker, Kubernetes (via Ingress Controller and Operator), AWS, Azure, GCP, ARM64, macOS (dev)
Solid Security (formerly iThemes Security)
- You need: WordPress agencies managing multiple sites, users wanting modern authentication features like passkeys, sites needing automatic virtual patching for plugin vulnerabilities
- 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: Kong Gateway WAF or Solid Security (formerly iThemes Security)?
Solid Security (formerly iThemes Security) offers a free tier while Kong Gateway WAF does not, making Solid Security (formerly iThemes Security) more accessible for budget-conscious startups. Solid Security (formerly iThemes Security) 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: Kong Gateway WAF or Solid Security (formerly iThemes Security)?
Kong Gateway WAF has a higher support rating (4.2/5) compared to Solid Security (formerly iThemes Security) (4.0/5). 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: Kong Gateway WAF or Solid Security (formerly iThemes Security)?
Solid Security (formerly iThemes Security) scores higher for ease of use (4.3/5) versus Kong Gateway WAF (3.2/5). The actual implementation effort depends on your existing infrastructure and team expertise.
Which is more cost-effective: Kong Gateway WAF or Solid Security (formerly iThemes Security)?
Solid Security (formerly iThemes Security) offers a free tier while Kong Gateway WAF requires a paid plan. Solid Security (formerly iThemes Security) scores higher for value (4.2/5). Total cost depends on your traffic volume, required features, and support level needs.
Which works better with AWS: Kong Gateway WAF or Solid Security (formerly iThemes Security)?
Kong Gateway WAF explicitly supports AWS while Solid Security (formerly iThemes Security)'s AWS integration may vary. Consider whether native AWS integration or cross-cloud portability matters more for your use case.