Best WAF for Azure
Discover the best Web Application Firewall options for Microsoft Azure. Compare Azure WAF, Cloudflare, Imperva, Barracuda, and F5 across Application Gateway and Azure Front Door.
Microsoft Azure provides several native and third-party options for Web Application Firewall protection. The native Azure Web Application Firewall integrates with Azure Application Gateway for regional protection and with Azure Front Door Standard and Premium for global edge protection.
For enterprises invested in the Microsoft ecosystem, Azure WAF offers seamless integration with Microsoft Sentinel for SIEM and comprehensive compliance frameworks, and ships with the Microsoft-managed Default Rule Set (DRS) 2.2, baselined on OWASP CRS 3.3.4. Third-party solutions such as Cloudflare, Imperva, Barracuda, and F5 provide alternatives with multi-cloud reach and features beyond the native service.
Note that WAF on Azure CDN is being consolidated into Azure Front Door. Azure CDN from Edgio retired in January 2025 and Azure CDN from Microsoft (classic) is retiring in September 2027, so Application Gateway and Azure Front Door are the two current native WAF surfaces on Azure.
Top WAF Providers for Azure
Azure Web Application Firewall
Editor's ChoiceAzure WAF is the natural choice for workloads already running on Microsoft Azure. It plugs directly into Azure Application Gateway (regional, inside your VNet) and Azure Front Door Standard and Premium (global edge), shares a single policy model across both, and streams detections into Azure Monitor and Microsoft Sentinel. The Microsoft-managed Default Rule Set (DRS) 2.2, baselined on OWASP CRS 3.3.4, plus the Bot Manager ruleset, ship out of the box.
Key Benefits:
- Native integration with Application Gateway and Front Door
- Microsoft Default Rule Set (DRS) 2.2 based on OWASP CRS 3.3.4
- Bot Manager ruleset on both Front Door and Application Gateway
- Detections flow into Microsoft Sentinel and Azure Monitor
Cloudflare Web Application Firewall
Best for Multi-CloudCloudflare sits in front of Azure workloads as an edge WAF and CDN with only a DNS change, requiring no changes to Application Gateway or Front Door. Its single control plane gives teams consistent security policies across Azure, AWS, and GCP, which makes it a strong fit for multi-cloud or hybrid estates that want WAF, bot management, and DDoS mitigation applied before traffic ever reaches Azure.
Key Benefits:
- Deploys in front of Azure with a DNS change only
- Unified policy across Azure, AWS, GCP, and on-prem
- Global edge network with CDN and DDoS mitigation
- Managed rules, bot management, and API protection
Imperva Web Application Firewall
Enterprise LeaderImperva offers a full web application and API protection platform for Azure-hosted apps, delivered as a cloud edge service or as an appliance from the Azure Marketplace. For enterprises that need capabilities beyond the native service, such as advanced bot defense, API security, and account takeover protection, Imperva provides a mature managed rule set, low false positives, and 24/7 SOC support while keeping policy consistent across clouds.
Key Benefits:
- Cloud WAAP or Azure Marketplace appliance deployment
- Advanced bot and API protection beyond native rules
- Managed rules with low false positives and SOC support
- Consistent policy across multi-cloud and hybrid estates
Barracuda Web Application Firewall
Azure MarketplaceBarracuda WAF is available directly from the Azure Marketplace as a virtual machine and is one of the most established third-party WAFs for Azure. It deploys inside your VNet, integrates with Azure autoscaling and Azure Monitor, and can be billed hourly (PAYG) or bring-your-own-license, giving teams that want a dedicated appliance more granular tuning than the native service.
Key Benefits:
- One-click deployment from the Azure Marketplace
- Runs inside your VNet with autoscaling support
- Hourly (PAYG) or bring-your-own-license options
- Application delivery and WAF in one appliance
F5 BIG-IP Advanced WAF
Advanced ProtectionF5 BIG-IP Advanced WAF runs as a Virtual Edition on Azure via the Marketplace, bringing enterprise-grade protection such as L7 DDoS defense, behavioral analytics, and proactive bot defense to Azure workloads. It is the strongest fit for organizations that already standardize on F5 policies on-premises and want the same controls extended into Azure for a consistent hybrid security posture.
Key Benefits:
- BIG-IP Virtual Edition available on Azure Marketplace
- L7 DDoS, behavioral analytics, and proactive bot defense
- Consistent F5 policy across on-prem and Azure
- Deep API and credential-protection controls
Fortinet FortiWeb
AI/ML DetectionFortinet FortiWeb is available as a virtual machine in the Azure Marketplace and as the FortiWeb Cloud SaaS service, protecting Azure applications with machine-learning anomaly detection, bot mitigation, and API security. For teams already running the Fortinet Security Fabric, FortiWeb on Azure extends that ecosystem into the cloud while layering ML-based threat detection on top of signature rules.
Key Benefits:
- FortiWeb VM or FortiWeb Cloud SaaS on Azure
- Machine-learning anomaly and bot detection
- API discovery and protection
- Integrates with the Fortinet Security Fabric
Developer-friendly WAF using proprietary SmartParse technology, offering low false positives and seamless DevOps integration for modern application security.
Fully managed cloud WAF combining automatic policy generation, advanced bot mitigation, and 24/7 expert support with industry-leading DDoS protection.
AI-powered WAF with preemptive zero-day protection, featuring dual machine learning engines and minimal false positives for cloud-native applications.
High-performance WAF built into the world's most widely used open source load balancer. Uses machine learning-powered threat detection instead of regex-based signatures, delivering 98.5% balanced accuracy with sub-millisecond latency. Enterprise product with custom pricing.
Enterprise CNAPP with integrated WAF, API security, and bot management, designed for cloud-native applications across multi-cloud environments.
API-first security platform combining cloud-native WAF, automated security testing, and advanced API abuse detection with real-time blocking capabilities.
AI-powered bot and fraud protection platform that stops advanced bots, credential stuffing, scraping, and L7 DDoS attacks across websites, mobile apps, and APIs. Forrester Leader in Bot Management with 99.99% detection accuracy and sub-2ms latency. Starts at $3,830/month.
Lightweight, high-performance WAF running natively inside NGINX Plus. Brings F5's enterprise threat intelligence to DevOps workflows with declarative configuration, Kubernetes-native deployment, and CI/CD integration. Part of the NGINX One platform.
AI-powered API security platform combining WAF/WAAP, automated API discovery, security testing, and bot protection with runtime defense across any environment.
Cloud-native WAAP platform offering fully managed WAF, bot management, and DDoS protection with private cloud deployment options for enhanced data privacy.
Fully managed cloud WAF by Indusface with integrated vulnerability scanning, zero false positive guarantee, and 24/7 SOC support. Deploys in block mode from day one.
Enterprise application firewall integrated into the Citrix NetScaler (now Citrix ADC) application delivery controller, providing positive and negative security models with deep traffic inspection.
Australian-based WAAP platform combining WAF, bot management, DDoS protection, and CDN in a single solution designed for DevOps and security teams.
AI-powered WAF built natively on Kubernetes, combining behavioral threat detection with zero-configuration API protection for cloud-native applications.
European sovereign WAF offering comprehensive application and API protection with EU data residency guarantees and flexible SaaS or cloud deployment options.
Cloud-native WAF from Alibaba Cloud, the largest cloud provider in Asia-Pacific. AI-powered deep learning detection, bot management, API security, and DDoS protection. Battle-tested during Double 11 (Singles' Day) handling millions of QPS. Available as pay-as-you-go (SeCU-based billing) or subscription. Recognized by Gartner, Forrester, IDC, and Frost & Sullivan.
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.
Enterprise-grade next-gen WAF from Chinese cybersecurity leader NSFOCUS, offering comprehensive web and API protection with flexible cloud, on-premises, and hybrid deployment options.
German-made, GDPR-compliant cloud WAF built for critical infrastructure and regulated industries. BSI-qualified, NIS-2 and DORA compliant. Managed WAF service available. Blocks 8M+ malicious L7 requests per customer per year. Data processing exclusively in Germany on request.
Appliance-based WAF from the established network security vendor, offering deep packet inspection, PCI DSS compliance, and integration with SonicWall's broader firewall ecosystem.
Cloud-managed WAF from Qualys that integrates with their vulnerability scanning platform, enabling one-click virtual patching of discovered vulnerabilities. Note — product was decommissioned September 2024.
What to Look For in a WAF for Azure
Key considerations for Azure WAF selection:
- Managed Rule Set - Azure WAF ships with the Microsoft Default Rule Set (DRS) 2.2, baselined on OWASP CRS 3.3.4, with per-rule exclusions and custom rules; older CRS 3.x rulesets remain selectable but are no longer the recommended default
- Application Gateway Integration - Native integration with Azure Application Gateway v2 for regional WAF protection inside your VNet
- Azure Front Door - Global load balancing with integrated WAF for edge protection; Front Door Standard includes custom rules while Premium adds the managed rule set and Bot Manager
- Bot Protection - The Bot Manager managed ruleset is now available on both Azure Front Door and Application Gateway for classifying known good and bad bots
- Microsoft Sentinel Integration - Security event correlation, automated response playbooks, and threat hunting
- Compliance - Built-in compliance with Azure certifications including SOC 2, ISO 27001, and HIPAA
Azure Considerations
Azure-specific considerations when deploying a WAF:
- Application Gateway vs Front Door - Application Gateway WAF is regional and inspects traffic at the VNet level. Front Door WAF is global and operates at the edge. Choose based on your architecture.
- Front Door Tier Structure - Front Door Standard includes custom WAF rules, while Front Door Premium adds the managed rule set, Bot Manager, and Microsoft Threat Intelligence. WAF is bundled into the tier price rather than billed per policy.
- WAF Policy Sharing - Azure WAF policies can be shared across multiple Application Gateways and Front Door profiles, simplifying management at scale.
- Custom Rules - Azure WAF supports custom rules with match conditions based on IP, geo-location, request size, headers, and body content.
- Diagnostic Logging - Enable diagnostic logs to Azure Monitor, Log Analytics, or Event Hubs for full visibility into WAF decisions.
Frequently Asked Questions
Should I use Azure Application Gateway WAF or Azure Front Door WAF?
Use Application Gateway WAF for regional deployments where traffic enters your VNet directly. Use Front Door WAF for global applications that need edge protection across multiple regions. For global applications, Front Door WAF also provides DDoS protection and global load balancing.
What is the difference between Azure Front Door Standard and Premium for WAF?
Both tiers include WAF, but capability differs. Front Door Standard includes custom WAF rules, while Front Door Premium adds the Microsoft-managed Default Rule Set (DRS), Bot Manager, and Microsoft Threat Intelligence integration. WAF is bundled into each tier's price rather than billed per policy, so Premium is the choice when you need managed rules and bot protection at the edge.
Can I use third-party WAFs on Azure?
Yes. Cloudflare, Imperva, Barracuda, F5, and others are available via the Azure Marketplace or as external edge services. Third-party WAFs are particularly useful for multi-cloud deployments where you want consistent security policies across Azure, AWS, and GCP.
How does Azure WAF pricing work?
Azure WAF pricing depends on the deployment method. Application Gateway WAF v2 bills a fixed gateway-hour charge plus consumed capacity units (driven by compute, persistent connections, and throughput), with WAF policies and rules included at no extra charge. On Azure Front Door Standard and Premium, WAF is bundled into the tier price: Standard includes custom rules and Premium adds the managed rule set and Bot Manager, with no separate per-policy WAF fee. Per-policy and per-request WAF billing applied only to Front Door (classic), which retires on 31 March 2027.