Best Web Application Firewalls (WAF)

Compare the Top Web Application Firewalls (WAF) as of June 2025

What are 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 Web Application Firewalls (WAF) currently available using the table below. This list is updated regularly.

  • 1
    SKUDONET

    SKUDONET

    SKUDONET

    Reliable, Scalable, and Secure Load Balancing Formerly known as Zevenet, SKUDONET Enterprise Edition is an advanced and highly scalable Open Source Application Delivery and Security Platform designed to handle large volumes of traffic across any environment—whether physical, virtual, or cloud-based for modern IT infrastructures. Built on the Linux Debian system, SKUDONET offers a robust platform that integrates advanced security and performance features, offering a cost-effective alternative to other solutions on the market. Key Features & Benefits: ✔ High Availability – Prevents downtime with intelligent traffic balancing and clustering ✔ Advanced Security – Includes DoS protection, SSL offloading, and L7 filtering to enhance cybersecurity ✔ High Scalability – Multi-core processing, optimized packet handling, and support for high-throughput environments ✔ Flexible Deployment – Available for bare metal, virtual machines, and cloud platforms with BYOL (AWS, DigitalOcean)
    Starting Price: $1736/year/appliance
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  • 2
    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
  • 3
    Haltdos

    Haltdos

    Haltdos

    Haltdos promises an intelligent WAF & DDoS mitigation service with multi-layered security to online businesses requiring zero management. It is a self-learning solution that continuously learns and adapts network/website traffic and provides real-time and historical insights with stunning visualization. It also provides attack alerts and notifications, attack signatures, customer misbehavior, and audit trail.
  • 4
    Barracuda WAF-as-a-Service
    Configuring traditional web application firewalls can take days of effort. But Barracuda WAF-as-a-Service—a full-featured, cloud-delivered application security service—breaks the mold. Deploy it, configure it, and put it into full production—protecting all your apps from all the threats—in just minutes.
  • 5
    AWS WAF

    AWS WAF

    Amazon

    AWS WAF is a web application firewall that helps protect your web applications or APIs against common web exploits that may affect availability, compromise security, or consume excessive resources. AWS WAF gives you control over how traffic reaches your applications by enabling you to create security rules that block common attack patterns, such as SQL injection or cross-site scripting, and rules that filter out specific traffic patterns you define. You can get started quickly using Managed Rules for AWS WAF, a pre-configured set of rules managed by AWS or AWS Marketplace Sellers. The Managed Rules for WAF address issues like the OWASP Top 10 security risks. These rules are regularly updated as new issues emerge. AWS WAF includes a full-featured API that you can use to automate the creation, deployment, and maintenance of security rules. With AWS WAF, you pay only for what you use. The pricing is based on how many rules you deploy and how many web requests your application receives.
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