open-appsec
open-appsec: A flexible open-source WAF for cloud-native web applications and APIs. Ranked #5 of 35 in Web Application Firewall Software by our editors (8.9/10); pricing: Open source; best for cloud-native teams wanting open-source ML protection.
At a glance
- Editor score8.9 / 10
- PricingOpen source
- Best forCloud-native teams wanting open-source ML protection
- Paid fromFree
- Deployment modelHybrid
- Facts checked20 Sep 2026
Where it wins
- Machine-learning protection for OWASP Top 10 and zero-day threats
- API discovery, schema validation, anti-bot, and rate limiting
- Integrates with Kubernetes, proxies, gateways, and service meshes
Where it doesn't
- Requires proxy, gateway, ingress, or service-mesh integration
- Advanced capabilities may require more security configuration work
- Central SaaS management is optional rather than the only operating model
Our verdict on open-appsec
open-appsec is an open-source web application firewall and API security solution from Check Point Software Technologies Ltd. It is designed for teams protecting web applications and APIs across Kubernetes, Docker, or Linux environments. The product uses machine learning to detect and prevent OWASP Top 10 and zero-day threats, while supporting hybrid deployments through local configuration or optional SaaS-based management. Its audience is particularly suited to cloud-native teams that want deployment flexibility and a broad security feature set without being limited to a single proxy or gateway.
Protection extends beyond core WAF filtering. open-appsec includes API discovery, malicious-content blocking, OpenAPI schema validation, anti-bot detection and mitigation, intrusion prevention based on Snort 3.0, malicious file-upload scanning, reputation checks, and configurable rate limiting by source identifier. This breadth makes it relevant for organizations securing both application traffic and API estates. Teams with a narrow requirement for basic web filtering may find the wider feature set more involved than necessary, while teams needing API visibility, bot controls, file security, and rate limiting can keep those functions within one security layer.
Its ecosystem fit is a notable strength. Integrations include Kubernetes, NGINX Ingress, NGINX, Kong, APISIX, Envoy, Envoy Gateway, Istio, NGINX Proxy Manager, NPMplus, SWAG, and CrowdSec. Configuration can be declarative through YAML, Kubernetes, and Terraform, or managed through a GraphQL API. Central SaaS management adds logging, reporting, and monitoring, while local and self-hosted operation supports environments that prefer direct control. Choose open-appsec when open-source availability, machine-learning protection, and varied cloud-native integrations matter; consider another product if you want a narrowly focused WAF with fewer deployment and configuration choices.
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open-appsec pricing
open-appsec fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Deployment model | Hybrid |
| Managed rule sets | Not verified |
| API protection | Yes |
| Bot management | Yes |
| Rate limiting | Yes |
| Log retention | Not verified |
| Deployment | Cloud, Self-hosted |
| Platforms | Web, Linux |
| Support | Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 12 integrations: Kubernetes, NGINX Ingress, NGINX, Kong, APISIX, Envoy … See all → |
| Pricing | Open source (source) |
| Website | openappsec.io |
| Facts checked | 20 Sep 2026 |
open-appsec integrations
open-appsec lists 12 integrations on its own site.
- Kubernetes
- NGINX Ingress
- NGINX
- Kong
- APISIX
- Envoy
- Envoy Gateway
- Istio
- NGINX Proxy Manager
- NPMplus
- SWAG
- CrowdSec
See all open-appsec integrations →
Alternatives to open-appsec
- Cloudflare WAFBroad edge WAF coverage with a free plan and Terraform management.9.4
- AWS WAFFlexible AWS-native protection with usage-based pricing that requires careful cost planning.9.2
- Wallarm WAAPA broad WAAP platform with a useful free tier for API-focused security teams.9.1
See all open-appsec alternatives →
open-appsec vs the competition
- open-appsec vs Cloudflare WAF
- open-appsec vs AWS WAF
- open-appsec vs Wallarm WAAP
- open-appsec vs Akamai App & API Protector
- open-appsec vs Google Cloud Armor
- open-appsec vs Azure Web Application Firewall
Compare open-appsec with any tool side by side →
Also Ranked In
open-appsec is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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