Compare the Top On-Premises Web Application Firewalls (WAF) as of August 2025

What are On-Premises Web Application Firewalls (WAF)?

Web Application Firewalls (WAFs) are security solutions that protect web applications by filtering and monitoring HTTP traffic between the application and the internet. They detect and block threats such as SQL injections, cross-site scripting (XSS), and other common attacks targeting application vulnerabilities. WAFs analyze incoming requests in real time, applying customizable security rules to distinguish between legitimate and potentially malicious traffic. Many WAFs are cloud-based, enabling flexible and scalable protection without impacting application performance. By acting as a shield between web applications and attackers, WAFs help ensure data security, regulatory compliance, and uninterrupted user access. Compare and read user reviews of the best On-Premises Web Application Firewalls (WAF) currently available using the table below. This list is updated regularly.

  • 1
    CacheGuard

    CacheGuard

    CacheGuard Technologies

    CacheGuard-OS transforms a virtual or bare metal machine into a powerful and easy to handle network appliance. It's a Linux based Operating System built from scratch and especially designed to Secure and Optimize the network traffic. Great care has been taken by CacheGuard-OS developers to select the best of the best Open Source technologies to integrate into CacheGuard-OS. The result is a robust and trustworthy solution that can be up and running within minutes. CacheGuard-OS integrates Open Source software such as but not limited to OpenSSL, NetFilter, IProute2, StrongSwan, ClamAV, Apache, ModSecurity, Squid and Open Source developments made by CacheGuard-OS developers.
    Starting Price: $9.99 per month
  • 2
    Barracuda CloudGen Firewall
    Get comprehensive protection for on-premises and multi-cloud deployment using the firewall built in and for the cloud. Frictionless, cloud-hosted Advanced Threat Protection detects and blocks advanced threats, including zero-day and ransomware attacks. Gain rapid protection against the newest threats with the help of a global threat intelligence network fed by millions of data collection points. Modern cyber threats such as ransomware and advanced persistent threats, targeted attacks, and zero-day threats, require progressively sophisticated defense techniques that balance accurate threat detection with fast response times. Barracuda CloudGen Firewall offers a comprehensive set of next-generation firewall technologies to ensure real-time network protection against a broad range of network threats, vulnerabilities, and exploits, including SQL injections, cross-site scripting, denial of service attacks, trojans, viruses, worms, spyware, and many more.
  • 3
    F5 Distributed Cloud WAF
    Mitigate web app attacks and vulnerabilities with comprehensive security controls and uniform policy and observability via our SaaS-delivered WAF that’s quick to set up and deploy, and easy to manage and scale across any environment. Simplify app security by seamlessly integrating protections into the development process with core security functionality, centralized orchestration, and oversight. F5 Distributed Cloud WAF eases the burden and complexity of consistently securing apps across clouds, on-premises, and edge locations. Delivering the programmability that DevOps needs combined with the efficacy and oversight that SecOps mandates, enabling faster, more secure application delivery and release cycles. Quickly improve visibility and insight across all security events including WAF signatures hit, DoS events, automated and persistent threats, and all other client interactions along with app performance, including intuitive drill-down capabilities.
  • 4
    Fortinet

    Fortinet

    Fortinet

    Fortinet is a global leader in cybersecurity solutions, known for its comprehensive and integrated approach to safeguarding digital networks, devices, and applications. Founded in 2000, Fortinet provides a wide range of products and services, including firewalls, endpoint protection, intrusion prevention systems, and secure access solutions. At the core of its offerings is the Fortinet Security Fabric, a unified platform that seamlessly integrates security tools to deliver visibility, automation, and real-time threat intelligence across the entire network. Trusted by businesses, governments, and service providers worldwide, Fortinet emphasizes innovation, scalability, and performance, ensuring robust defense against evolving cyber threats while supporting digital transformation and business continuity.
  • 5
    Signal Sciences

    Signal Sciences

    Signal Sciences

    The leading hybrid and multi-cloud platform that provides next-gen WAF, API Security, RASP, Advanced Rate Limiting, Bot Protection, and DDoS purpose built to eliminate the challenges of legacy WAF. Legacy WAFs weren’t designed for today’s web apps that are distributed across cloud, on-premise or hybrid environments. Our next-gen web application firewall (NGWAF) and runtime application self protection (RASP) increase security and maintain reliability without sacrificing velocity, all at the lowest total cost of ownership (TCO).
  • 6
    A10 Thunder ADC

    A10 Thunder ADC

    A10 Networks

    High-performance advanced load balancing solution that enables your applications to be highly available, accelerated, and secure. Ensure efficient and reliable application delivery across multiple datacenters and cloud. Minimize latency and downtime, and enhance end-user experience. Increase application security with advanced SSL/TLS offload, single sign-on (SSO), DDoS protection and Web Application Firewall (WAF) capabilities. Complete full-proxy Layer 4 load balancer and Layer 7 load balancer with flexible aFleX® scripting and customizable server health checks.
  • 7
    Alert Logic
    Alert Logic is the only managed detection and response (MDR) provider that delivers comprehensive coverage for public clouds, SaaS, on-premises, and hybrid environments. Since no level of investment prevents or blocks 100% of attacks, you need to continuously identify and address breaches or gaps before they cause real damage. With limited expertise and a cloudcentric strategy, this level of security can seem out of reach. Our cloud-native technology and white-glove team of security experts protect your organization 24/7 and ensure you have the most effective response to resolve whatever threats may come. Founded in 2002, Alert Logic is headquartered in Houston, Texas and has business operations, team members, and channel partners located worldwide. Learn more at alertlogic.com. Alert Logic – unrivaled security for your cloud journey.
  • 8
    open-appsec

    open-appsec

    open-appsec

    automatic web application & API security using machine learning open-appsec is an open-source initiative that builds on machine learning to provide pre-emptive web app & API threat protection against OWASP-Top-10 and zero-day attacks. It can be deployed as add-on to Kubernetes Ingress, NGINX, Envoy and API Gateways. open-oppsec simplifies maintenance as there is no threat signature upkeep and exception handling, like common in many WAF solutions.
  • 9
    F5 BIG-IP Next WAF
    A containerized environment for continuous web app protection, BIG-IP Next WAF ensures superior security with simplified management. Advanced capabilities make it easy to identify and mitigate threats efficiently. Save time and clicks when completing configuration workflows, reduce the initial tuning phase, and quickly be ready for blocking mode. Simplify detection and response to threats with actionable incident dashboards across multiple policies. Maintain consistent app security policies across environments, in the data center, the edge, or the public cloud. Purchase additional licenses via a simple platform mechanism to increase security coverage. Defend against common attack vectors, including known vulnerabilities (CVEs). Automatically mitigate active attack campaigns with intelligent updates by expert threat researchers at F5. Deliver key contextual awareness by identifying and blocking the sources of known bad IP addresses.
  • 10
    WebOrion Protector
    WebOrion Protector is an enterprise-grade web application firewall (WAF) designed to deliver unmatched protection using the OWASP Core Rule Set (CRS). Built on the advice of the global OWASP community's leading experts in web application security, it leverages an intelligent anomaly-scoring, heuristics, and signature-based engine to defend against threats and exploits covered by the OWASP top 10 web application security risks. Rapidly respond to zero-day threats with seamless virtual patching and a powerful user interface built to streamline monitoring, analytics, and fine-tuning, with both entry-level and advanced users in mind. WebOrion Protector also comes equipped with specialized rulesets to protect login pages, WordPress sites, and more. It inspects all incoming and outgoing web traffic for your website with minimal performance impact.
  • 11
    Oracle Web Application Firewall
    Protect applications from malicious and unwanted internet traffic with a cloud-based, PCI-compliant, global web application firewall service. By combining threat intelligence with consistent rule enforcement, Oracle Cloud Infrastructure Web Application Firewall strengthens defenses and protects internet-facing application servers. Adopt an edge security strategy with a web application firewall that aggregates threat intelligence from multiple sources including WebRoot BrightCloud® and more than 250 predefined OWASP, application, and compliance-specific rules. Protect applications deployed in Oracle Cloud Infrastructure, on-premises, and in multicloud environments with access controls based on geolocation data, whitelisted and blacklisted IP addresses, HTTP URL, and HTTP header. Identify and block malicious bot traffic with an advanced set of verification methods, including JavaScript, CAPTCHA, device fingerprinting, and human interaction algorithms.
  • 12
    NSFOCUS WAF
    Shield your applications with our versatile WAF, a critical component of defense-in-depth security. Deploy it as a standalone solution, seamlessly integrate it with our ADS series for enhanced protection, or leverage its cloud-based deployment for unrivaled flexibility. Protect APIs from a wide range of attacks. Detect and block bots that are trying to access web applications. Analyze the behavior of users to identify and block malicious traffic. Can be deployed in the cloud, easier to scale and manage. Virtually patch vulnerabilities in web applications without requiring the application to be updated. Unleash the power of next-generation web application security with our cutting-edge WAF, designed to safeguard your applications from evolving threats. Our solution harnesses the power of semantic analysis, intelligent analytics, threat intelligence, and smart patching to identify and neutralize a vast range of web attacks, including all OWASP top 10 attacks, DDoS attacks, etc.
  • 13
    BunkerWeb

    BunkerWeb

    Bunkerity

    BunkerWeb is a next-generation and open-source Web Application Firewall (WAF). Being a full-featured web server (based on NGINX under the hood), it will protect your web services to make them "secure by default". BunkerWeb integrates seamlessly into your existing environments (Linux, Docker, Swarm, Kubernetes, …) and is fully configurable (don't panic, there is an awesome web UI if you don't like the CLI) to meet your own use-cases . In other words, cybersecurity is no more a hassle. BunkerWeb contains primary security features as part of the core but can be easily extended with additional ones thanks to a plugin system).
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