Best Web Application Firewalls (WAF) with a Free Trial of 2026

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SKUDONET provides IT leaders with a cost effective platform that focuses on simplicity and flexibility. It ensures high performance of IT services and security. Effortlessly enhance the security and continuity of your applications with an open-source ADC that enables you to reduce costs and achieve maximum flexibility in your IT infrastructure.

FortiWeb WAF protects web applications and APIs from the OWASP Top 10, zero-day threats, and other application-layer attacks. It also includes robust features such as API discovery and protection, bot mitigation, threat analytics, and advanced reporting.

AppTrana, a fully managed Web app firewall, includes Web application scanning to identify application-layer vulnerabilities, instant and managed Risk-based Protection with its WAF and Managed DDOS, and Bot Mitigation service. Web site acceleration can also be provided with a bundled CDN, or can integrate with an existing CDN. All this is backed by a 24x7 managed security expert service that provides policy updates and custom rules with zero false positive guarantee. Only vendor to be named Customers’ Choice for WAAP in all the 7 segments of the Gartner VoC 2022 Report.

Haltdos ensures the 100% high availability of your website/web services by providing intelligent Web Application Firewall and application DDoS mitigation, Bot Protection, SSL offloading, Load Balancing solution over the public and private cloud that monitors, detects, and automatically mitigates a wide range of cyber-attacks including OWASP top 10 and Zero-day attacks, without requiring any human intervention.

Achieve extensive security for both on-premises and multi-cloud environments with the integrated firewall designed for cloud operations. The seamless, cloud-based Advanced Threat Protection system identifies and prevents sophisticated threats, such as zero-day vulnerabilities and ransomware assaults. With the support of a worldwide threat intelligence network that gathers data from millions of sources, you can quickly shield yourself from the latest dangers. Today's cyber threats, including ransomware, advanced persistent threats, and targeted attacks, necessitate increasingly advanced defense strategies that effectively balance precise threat detection with swift reaction capabilities. The Barracuda CloudGen Firewall provides an all-encompassing suite of next-generation firewall features to guarantee immediate network defense against a vast array of risks, weaknesses, and exploits, encompassing SQL injections, cross-site scripting, denial of service intrusions, trojans, malware, worms, spyware, and much more. By leveraging these advanced technologies, organizations can significantly enhance their resilience against evolving cyber threats and ensure the integrity of their data.

Protect websites from plugin vulnerabilities. WebARX is more than a security plugin. Our lightweight web application firewall blocks malicious traffic. WebARX firewall engine allows you to create your own firewall rules. Monitor your websites for security vulnerabilities and issues. WebARX is constantly updated and helps you to adapt the most recent security practices. You can generate weekly security reports and be alerted if anything is urgent.

The Advanced Web Application Firewall (WAF) safeguards your applications using behavioral analytics, proactive defense against bots, and encryption for sensitive data at the application layer. To understand how the Advanced WAF can enhance your security and reduce costs, utilize the ROI Estimator provided by F5 and Forrester. The F5 BIG-IP Advanced WAF is equipped with a robust array of security options designed to shield your web applications from various threats. While many WAFs deliver only a fundamental level of protection at the upper layers of the OSI model, the F5 Advanced WAF goes beyond that by incorporating advanced security capabilities such as the Anti Bot Mobile SDK, Credential Stuffing threat feeds, Proactive Bot Defense, and Datasafe, among others. It is essential to defend your applications, APIs, and data from common threats, including zero-day exploits, application-layer DoS attacks, coordinated threat campaigns, application takeovers, and malicious bots, ensuring a comprehensive security strategy. By investing in such advanced protections, you can significantly bolster your security measures and better protect your digital assets against evolving threats.

Enhance the security of web applications against various attacks and vulnerabilities by employing robust security measures and a consistent policy framework through our SaaS-based Web Application Firewall (WAF), which is designed for rapid deployment and effortless scalability in any environment. Streamline application security by integrating protective features directly into the development workflow, supported by essential security capabilities, centralized management, and comprehensive monitoring. The F5 Distributed Cloud WAF simplifies the challenges of maintaining secure applications across multiple cloud platforms, on-premises infrastructures, and edge environments. By providing the programmability essential for DevOps alongside the oversight required by SecOps, it facilitates quicker and safer application delivery and release processes. Additionally, users can enhance their understanding of security events, including WAF signature activations, denial-of-service incidents, ongoing automated threats, and all interactions with clients, while also gaining insight into application performance, complete with user-friendly drill-down options. This holistic approach ensures that security is not just an afterthought but an integral part of the development lifecycle.

Streamline the process of application delivery by utilizing software-defined load balancers, web application firewalls, and container ingress services that can be deployed across any application in various data centers and cloud environments. Enhance management efficiency through unified policies and consistent operations across on-premises data centers as well as hybrid and public cloud platforms, which include VMware Cloud (such as VMC on AWS, OCVS, AVS, and GCVE), AWS, Azure, Google Cloud, and Oracle Cloud. Empower infrastructure teams by alleviating them from manual tasks and provide DevOps teams with self-service capabilities. The automation toolkits for application delivery encompass a variety of resources, including Python SDK, RESTful APIs, and integrations with Ansible and Terraform. Additionally, achieve unparalleled insights into network performance, user experience, and security through real-time application performance monitoring, closed-loop analytics, and advanced machine learning techniques that continuously enhance system efficiency. This holistic approach not only improves performance but also fosters a culture of agility and responsiveness within the organization.

Our engineers are specialists at working in sectors where zero downtime is critical. Since 2003, we’ve been building a reputation for delivering ultra-reliable, easy to deploy and effortlessly scalable applications that are trusted by solution partners, system integrators and end-users alike. Our focus on forming long-lasting partnerships with industry-leading solution providers in healthcare, storage and print, requires an in-depth understanding of both our partners and their clients’ technical and business practices. The result: unprecedented levels of uptime.

Meet the Industry’s Context-Aware API Security Platform Traceable identifies all of your APIs, and evaluates your API risk posture, stops API attacks that lead to incidents such as data exfiltration, and provides analytics for threat hunting and forensic research. With our solution, you can confidently discover, manage and secure all of your APIs, quickly deploy, and easily scale to meet the ongoing needs of your organization.

Myra Security is a premier provider of cloud-based application and network security solutions, offering comprehensive protection against today’s evolving cyber threats. Emphasizing reliability, high performance, and strict compliance, Myra delivers security services that are both robust and easy to deploy within existing IT environments. At the heart of Myra’s offering is its application security portfolio, which includes DDoS Protection, Web Application Firewall (WAF), Content Delivery Network (CDN), Bot Management, and a CAPTCHA product. Beyond application security, Myra offers network security solutions that protect critical infrastructure, corporate networks, and digital assets from increasing cyber risks. Their network-level safeguards ensure secure, stable, and compliant data flows, making them especially suitable for highly regulated industries such as finance, healthcare, and government.

SafeLine is one of the most popular WAF solutions globally, serving thousands of paid users and hundreds of thousands of active users daily. Utilizing a cutting-edge machine learning engine, it delivers nearly flawless detection rates and minimal false positives by deeply analyzing HTTP traffic semantics. The platform provides comprehensive bot mitigation features such as CAPTCHA challenges and adaptive protections against malicious crawlers. It also defends against large-scale HTTP Flood DDoS attacks by intelligently managing traffic flows and enforcing access controls. SafeLine’s unified identity management supports seamless integration across various cloud and on-premises environments. With an easy-to-use, wizard-driven interface and modular design, organizations can deploy and maintain enterprise-grade protection effortlessly. Pricing transparency ensures users understand exactly what they pay for, with options suited for personal use up to large-scale deployments. SafeLine’s open-source roots foster community-driven improvements, continuously enhancing its capabilities.

We offer the most user-friendly technology without sacrificing performance or features. We back it up with exceptional support and care delivered under a fair, cost-effective pricing model Our technology is used by small startups with big ideas, small budgets, and global enterprises. We love them all! Easy to use Load balancing, WAF, GSLB and SSO/Pre-Authentication. It is also the only true ADP Application Delivery Platform that allows for the enhancement of functionality and longevity using the app store or apps you create in-house.

Setting up conventional web application firewalls can require days of intensive work. However, Barracuda WAF-as-a-Service, a comprehensive and cloud-based application security solution, transforms this experience. You can deploy it quickly, adjust its settings, and have it fully operational—safeguarding all your applications from various threats—in a matter of minutes. This efficiency not only saves time but also ensures robust protection for your assets.

The Modshield SB Web Application Firewall (WAF), which utilizes Modsecurity and the OWASP Core Ruleset, is specifically designed to address all your application security requirements. It offers a comprehensive suite of security features ensuring complete protection for your applications and hosting environments. With the support of the OWASP Core Ruleset, Modshield SB delivers exceptional defense against the top ten OWASP threat vectors, including automated protections and safeguards against credential stuffing attacks. Choosing the Modshield SB Web Application Firewall means you can reliably ensure the confidentiality, integrity, and availability of your business applications for your users. Establishing a robust first line of defense for your applications has never been easier or more effective. Thanks to the integrated OWASP Core Ruleset, all your applications are automatically shielded from the most critical OWASP threats. Furthermore, there's no need for a separate Load Balancer, as you can utilize the built-in load balancing capabilities that Modshield SB provides, streamlining your infrastructure while enhancing security.

BaishanCloud delivers a dependable and streamlined CDN service, showcasing its regional knowledge particularly in areas such as China, Southeast Asia, and the Middle East. With over 1000 Points of Presence (PoPs) across the globe, it enables users to connect effectively, all while ensuring robust anti-DDoS and WAF protection alongside private network options. This level of reliability has earned BaishanCloud the trust of leading short media platforms that boast over 10 million users, thanks to its exceptional availability, ability to handle high concurrency, and low-latency content delivery solutions. By leveraging edge computing alongside extensive experience in the media sector, BaishanCloud effectively reduces security risks across platforms, assuring that major events run smoothly and video deliveries are uninterrupted. The company also provides customizable solutions and specialized features that cater to the unique requirements of its customers. To experience the service, potential users can opt for BaishanCloud’s free trial or design a personalized plan starting at just $0.065 per GB for the first 4TB of global traffic, making it a cost-effective choice for businesses of all sizes. This flexibility and commitment to customer satisfaction sets BaishanCloud apart in the competitive CDN landscape.

The complexity of application security is on the rise, but Barracuda simplifies it. The Barracuda Web Application Firewall is a key component of the Barracuda Cloud Application Protection platform, which integrates a wide array of complementary solutions and features aimed at providing thorough application security. This firewall shields applications, APIs, and mobile app backends from numerous threats, including the OWASP Top 10 vulnerabilities, zero-day exploits, data breaches, and application-layer denial of service (DoS) attacks. With a blend of signature-based policies, positive security measures, and advanced anomaly detection, the Barracuda Web Application Firewall effectively counters even the most intricate attacks targeting web applications today. Additionally, the Barracuda Active DDoS Prevention service, available as an enhancement to the Web Application Firewall, proactively filters out volumetric DDoS attacks before they can impact your network and compromise your applications. This multi-layered approach not only fortifies security but also enhances the overall resilience of your digital infrastructure.

Reblaze is a cloud-native, fully managed security platform for websites and web applications. Reblaze’s all-in-one solution supports flexible deployment options (cloud, multi-cloud, hybrid, DC), deployed in minutes and includes state-of-the-art Bot Management, API Security, next-gen WAF, DDoS protection, advanced rate limiting, session profiling, and more. Unprecedented real time traffic visibility as well as highly granular policies enables full control of your web traffic.

Qualys Web Application Firewall (WAF) is a service based on virtual appliances designed to streamline application security while minimizing operational costs and complexity. Utilizing a cohesive platform, it consistently identifies threats using proprietary inspection logic and rulesets, and can provide virtual patches for web application vulnerabilities as necessary. Its straightforward, scalable, and flexible methodology enables rapid blocking of web application attacks, safeguarding sensitive information from exposure, and regulating access to your applications. Qualys WAF can function independently or in conjunction with Qualys Web Application Scanning (WAS), which enhances the process of discovering and addressing web application vulnerabilities efficiently, regardless of whether you manage a few applications or many. By employing Qualys WAS for scanning and enabling one-click virtual patches for any identified vulnerabilities in the WAF, users can oversee everything from a centralized cloud portal, ensuring seamless management. Moreover, the deployment of Qualys WAF can be completed in just minutes, and it offers support for SSL/TLS, further enhancing its security capabilities. This combination of features makes it a robust solution for protecting web applications in today’s ever-evolving threat landscape.

Sangfor Athena NGFW is an advanced next-generation firewall designed to deliver robust, AI-driven security across network perimeters. Utilizing cloud-based AI malware inspection, it blocks over 99% of threats, combining network and web application firewalls in a single, unified device. The built-in SOC Lite module enables swift threat detection and incident response, enhancing organizational cybersecurity posture. Athena NGFW integrates seamlessly with a broader security ecosystem including endpoint protection (EPP), secure web gateways (SWG), and extended detection and response (XDR and MDR) platforms. The firewall has earned top industry accolades, such as AAA ratings in CyberRatings tests and recognition in Gartner’s Magic Quadrant. It provides cost-effective, scalable protection ideal for enterprise environments facing evolving cyber threats. Sangfor’s collaboration with global threat intelligence platforms keeps its defenses up to date against emerging vulnerabilities. This solution empowers organizations to maintain secure, high-performing networks with comprehensive visibility and control.

Attacks on web applications can hinder vital transactions and compromise sensitive information. The Imperva Web Application Firewall (WAF) meticulously evaluates traffic directed at your applications to thwart these threats and maintain seamless business operations. When faced with a disruptive WAF, organizations often find themselves torn between blocking genuine traffic or having to manually manage the attacks that slip through. To combat this challenge, Imperva Research Labs works diligently to enhance the precision of the WAF in light of evolving threats. With features like automatic policy generation and swift rule updates, security teams are empowered to safely utilize third-party code while aligning with the fast-paced demands of DevOps. Serving as a crucial element of a robust Web Application and API Protection (WAAP) framework, Imperva WAF safeguards all layers of your infrastructure, ensuring that only desired traffic reaches your applications. Our solution stands out in the industry by offering the most effective website protection available—compliant with PCI standards, automated security features that incorporate comprehensive analytics, and enhanced defenses that transcend the OWASP Top 10, ultimately minimizing risks associated with third-party integrations. Thus, your organization can confidently navigate the digital landscape without compromising security.

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. The open-appsec engine learns how users normally interact with your web application. It then uses this information to automatically detect requests that fall outside of normal operations, and sends those requests for further analysis to decide whether the request is malicious or not. open-appsec uses two machine learning models: 1. A supervised model that was trained offline based on millions of requests, both malicious and benign. 2. An unsupervised model that is being built in real time in the protected environment. This model uses traffic patterns specific to the environment. open-oppsec simplifies maintenance as there is no threat signature upkeep and exception handling, like common in many WAF solutions.

The Fastly Next-Gen WAF delivers robust protection for applications, APIs, and microservices, irrespective of their location, all through a cohesive solution. It features comprehensive reporting and alerting mechanisms that enhance Layer 7 visibility across your entire application and API landscape. By integrating seamlessly with your DevOps and security toolchains, it facilitates data sharing and correlation, which simplifies automation processes, thereby reducing security vulnerabilities and accelerating CI/CD workflows. Employing SmartParse, a highly precise detection technique, the system assesses the context of each request to identify potential malicious or unusual payloads effectively. This innovative method allows for minimal tuning requirements and enables immediate threat detection. Additionally, it safeguards against account takeover (ATO) incidents by scrutinizing web requests and linking unusual behavior with potential malicious actions, ensuring a higher level of security for your digital assets. This proactive approach not only enhances security but also instills confidence in your overall application resilience.