Top Azure WAF Alternatives in 2023

Posted DateOctober 5, 2023
Posted Time 9   min Read

Azure WAF is a web application firewall offered by Microsoft, designed to protect web applications hosted on the Azure platform. This cloud-based solution integrates with various Azure services and offers centralized management and monitoring via the Azure portal.

Azure WAF’s tight integration with the Azure network infrastructure enables traffic to be directed to the WAF without additional DNS modifications.

Most Important Features of Azure WAF

Usage-based Pricing

Azure WAF offers a pay-as-you-go pricing model, ensuring you only pay for the resources you consume. Typically, Azure WAF is charged according to the data volume it processes. This flexible approach aligns costs with your utilization of the web application firewall.

Integration with other Azure Security Roles

Azure WAF seamlessly integrates with Microsoft’s suite of Azure security tools, including Azure Sentinel, a cutting-edge SIEM solution. Microsoft Sentinel empowers organizations to proactively detect complex threats, conduct in-depth investigations, and respond immediately to bolster their security posture.

Regulatory Compliance

Thanks to its flexibility, achieving compliance with the data privacy requirements is effortlessly attainable through Azure. Azure offers an extensive range of over 100 compliance certifications, including more than 50 customized to address the unique needs of various global regions and countries.

Azure Marketplace Rules

Azure WAF offers the flexibility to purchase rule sets from leading WAF providers, such as Fortinet and Barracuda, through the Azure marketplace, delivering more comprehensive protection. These externally sourced rules receive frequent updates, surpassing the default Azure WAF rules in this regard.

It is essential to be aware that adopting these rules incurs a fixed subscription fee and usage-based charges for the traffic they analyze.

Reasons Why Do You Need to Look For Azure Alternatives

Bot Protection

If bot mitigation is one of your requirements from a WAAP, Azure may not be the best choice, as the bot mitigation capabilities available out-of-the-box are fairly basic. Also, bots have become advanced in that software needn’t be enough to block them. Especially in slow DDoS attacks or complex brute force attacks carried out by botnets where traditional approaches such as rate limits are ineffective. That is when you need managed services to counter these attacks effectively, and Azure’s managed services are limited to DDoS attacks.

API Security

The capabilities of API security are limited. While effective against simple cyber threats, basic API security cannot safeguard against advanced and highly skilled attackers. Adopting a robust and multi-faceted API security approach that includes API discovery and a built-in API security scanner is crucial to provide thorough protection.

Limited Native Security Offerings

Like many other public cloud WAFs, Azure WAF serves as a basic checkbox for application security and may not provide complete protection against advanced threats. If your applications are hosted in diverse environments like multiple cloud platforms, on-premises, or hybrid setups, opting for a platform-agnostic WAF like AppTrana is recommended.

AppTrana - the best Azure WAF alternative

Fifteen Azure WAF Alternatives to Consider

  1. AppTrana
  2. Akamai
  3. Imperva
  4. Cloudflare
  5. Fastly
  6. Radware
  7. Barracuda
  8. F5
  9. ThreatX
  10. Fortiweb
  11. Palo Alto
  12. Google Cloud Armor
  13. Sucuri
  14. NAXSI
  15. ModSecurity(Open Source)

A Quick Snapshot Comparison for the Top 5 Alternatives

WAF Feature Azure WAF AppTrana Akamai Imperva Cloudflare Fastly
Gartner Peer Insights Rating 4.5 4.9 4.7 4.7 4.5 4.9
Gartner Peer Insights Customer Recommendation Rating 89% 100% 88% 92% 93% 97%
DDoS Monitoring $2900 per month Starts at $399 Add-On Add-On Enterprise Only Ultimate Plan only
Virtual Patching Self-Service Starts at $99 Add-On Add-On Ultimate Plan only Ultimate Plan only
Payload Inspection Size 128KB 134MB Starts: 8KB

Max: 128KB

Unknown 128KB Unknown
NTLM Support Unknown Yes No Unknown No Unknown
Bot Protection Basic Protection Yes Add-On Not available in essentials

Add-on in Professional

Bundled in Enterprise Plan

Yes Yes, but unsure whether it is bundled in all plans
Response Timeout Unknown Default: 300 seconds


Max: 300 seconds

Default: 120 seconds


Max: 599 seconds

Default: 360 seconds

Max: Unknown

Default: 100 seconds
Enterprise: 6000 seconds
Default: 60 seconds



Max: 300 Seconds

Managed Services Not Available Starts at $399 Add-On Add-On Enterprise only Ultimate Plan only
DAST Scanner Not Available Bundled in all plans Not Available Not Available Not Available Not Available
Asset Discovery Not Available Bundled in all plans Not Available Not Available Not Available Not Available
Penetration Testing Not Available Bundled in the $399 plan Not Available Not Available Not Available Not Available
API discovery Not Available Available Available Available as an Add-On Available  Available
API Security Basic Available Available Available Available Available
API Scanning Not Available Bundled in the $399 plan Not Available Not Available Not Available Not Available
API Pen Testing Not Available Bundled in the $399 plan Not Available Not Available Not Available Not Available
Workflow-based bot mitigation Not Available Starts at $399 Add-On Add-On Enterprise only Ultimate Plan Only
Origin Protection Not Available Bundled in all plans Add-on Not Available Limited Add-on


The Top Five Alternatives to Azure WAF: In-Depth Comparison


AppTrana WAF is unique for its rapid 24-hour virtual patching of critical vulnerabilities, guaranteed to have ZERO false positives. The only WAAP vendor that openly discusses and commits to this core belief: 100% of applications onboarded in block mode.

Top Features of AppTrana

Unmetered Behavioural-based DDoS monitoring

With AppTrana, you receive unmetered Behavioural DDoS Protection included in every plan, removing the need for additional charges.

Moreover, you won’t have to manually configure static rate limits, as AppTrana analyzes user behaviour and recommends rate limits at the IP, geographical, and URL levels. This approach significantly reduces the likelihood of false positives, a common issue when using host-based rate-limiting policies.

Request Inspection Size

By default, AppTrana permits request inspection sizes of up to 134MB. However, the request inspection size in the Azure environment is restricted to a more limited 128KB.

Asset and API Discovery & Bundled VAPT

AppTrana offers comprehensive asset discovery, providing a holistic view of your public web assets, such as domains, subdomains, IPs, mobile apps, data centers, and APIs. This functionality aids in compliance efforts like SOC 2, ISO 27001, and PCI by facilitating the management of external asset inventories.

Once assets are identified, they can be seamlessly integrated into the bundled DAST scanner, with the option to augment security through penetration testing add-ons, ensuring a thorough risk assessment for applications and APIs.

AppTrana provides managed services for virtual patches or custom rules to address identified risks. Asset discovery, API Discovery, and the DAST scanner are accessible across all plans, while penetration testing is included in the premium plan.

Now, coming to the limitations of AppTrana

No Option for On-premise WAAP

While AppTrana enables organizations to leverage the advantages of cloud-based security, including dynamic scalability and centralized management, it may not align with the preference of enterprises that place a premium on retaining their security infrastructure only within their own facilities.

No Legacy API Support

At present, API security measures do not encompass protection for legacy API standards like SOAP and WebSocket.


Akamai was at the forefront of website protection against attacks and has become the world’s largest CDN provider. Its proficiency in CDN solutions has earned it significant popularity, especially in the media, gaming, and streaming industries.


Akamai’s cloud-based DDoS protection platform, Prolexic, is a robust barrier against potential attacks. It proactively intervenes to prevent these threats from reaching applications, data centers, or internet-facing infrastructure. The platform offers customers proactive mitigation under constant monitoring by Akamai’s round-the-clock global SOCC, guaranteeing an exceptional 100% uptime SLA.

Page Integrity Manager

With the increasing reliance on modern websites on multiple third-party sources executing scripts directly in user browsers, security teams encounter significant hurdles in overseeing and managing these external scripts. Akamai’s Page Integrity Manager, an in-browser cybersecurity offering, effectively tackles this challenge by quickly identifying suspicious script activities.

API Security

Akamai’s App & API Protector distinguishes itself through its automatic inspection of all API requests, eliminating the necessity for registration and providing instantaneous, robust API security upon implementation. Furthermore, it includes API Discovery functionality, which informs security teams about newly connected APIs, thereby fortifying protection.

If API security is one of the reasons you are looking for Azure WAF alternatives, then Akamai WAF and AppTrana are the preferred choices.

Limitations of Akamai


Akamai WAF tends to come with a higher price tag. Akamai is renowned for its enterprise-grade product offerings and top-tier features, which mirror their outstanding performance and reliability, rendering them a valuable investment, particularly when paired with managed services. Nevertheless, it may pose budget challenges for smaller organizations with limited resources.

Payload Inspection Size

Like Azure WAF, Akamai encounters restrictions when examining exceedingly large web request content. It enforces a maximum payload size limit of 128 KB, with the default configuration set at only 8 KB.

False Positive Management

Managing false positives can be equally challenging with Akamai as other leading WAAP providers. The WAF may unintentionally block legitimate users, requiring a manual examination. These challenges become especially apparent when your organization lacks certified in-house security professionals or hasn’t opted for the managed services add-on.


Recognized as a leading player in the Gartner Magic Quadrant for Web Application Firewalls, Imperva is one of the highly adopted WAF solution providers. Imperva reports that 90% of WAAP deployments are in block mode.

Hybrid Deployment

For organizations embracing a hybrid WAAP strategy, Imperva offers a comprehensive suite of solutions to depend on. They can choose to deploy an on-premise WAF to protect sensitive user data stored in their local data center, all while taking advantage of the cloud-based WAF for increased scalability and agility.


At the core of Imperva’s top-tier application security solution, RASP (Runtime Application Self Protection) revolutionizes the concept of defense-in-depth. With its ability to offer insights at the application layer, RASP equips SOC teams to make faster, well-informed decisions and significantly reduces investigation time. The outcome is precise threat detection, all while minimizing the false positives.

Here are the limitations of Imperva WAF

Managed Service is Add-on

To utilize a managed WAF, you must select the managed services add-on.

AppTrana takes it further with its managed WAF, including DDoS monitoring, virtual patches, and thorough false-positive testing, all incorporated into the $399 plan.

API Discovery as an Add-on

Adequate API security relies significantly on the initial API discovery stage, and opting for an additional charge for this functionality might not be the most efficient decision.

AppTrana and other WAAP providers already include API discovery in their standard pricing. Moreover, AppTrana’s licensing stands out by having penetration testing for API endpoints, offering a unique service that differentiates it from most other WAAP providers.


Cloudflare empowers your business to provide exceptional user experiences by enhancing performance and offering top-notch application security, all within a seamlessly integrated and user-friendly platform.

DDoS Protection

While all WAAP providers include DDoS protection, Cloudflare is typically perceived as a high-end solution, which may be accompanied by a pricing structure that aligns with its advanced features.

Cloudflare boasts a notable track record of effectively countering some of the largest-scale DDoS attacks ever recorded, underscoring its ability to mitigate substantial threats. Much like AppTrana, Cloudflare’s DDoS protection is tailored to adapt to your specific traffic patterns, providing an elevated level of defense against sophisticated DDoS attacks.

Actionable Threat Intelligence

When considering threat intelligence options, Azure taps into the collective knowledge of over 3,500 cybersecurity experts worldwide, working together to protect your business assets and Azure data.

Cloudflare relies on its extensive global network to identify and neutralize more than 136 billion threats daily.

Both providers actively utilize their insights to reduce risk levels, showcasing the industry’s top-tier threat intelligence. Explore a detailed comparison of Cloudflare vs. Azure WAF.

Solution for SaaS

Cloudflare’s SaaS offerings encompass many features, including SSL certificate management, support for vanity domains, advanced Bot Mitigation, WAF rules, analytics, DDoS protection, and API security solutions. This makes it a well-rounded choice suitable for SaaS companies regardless of their size.

Cons of Cloudflare WAF

False Positive Monitoring

Security software must continuously evolve to address the dynamic threat landscape. While Cloudflare boasts world-class threat intelligence, it faces the task of formulating generic rules to cover the diverse array of applications on its network, often leading to false positives.

Managing these false positives can be daunting, especially for organizations without a dedicated team of security experts or those unwilling to invest in managed services, which can come at a monthly cost of several thousand dollars.

Request Inspection Size

Like Azure, Cloudflare also permits the inspection of requests with a maximum size of 128KB. Nevertheless, considering how easily a payload exceeding this size can be transmitted, this constraint may prove insufficient.


Fastly stands out due to its remarkable success in preventing false positives, as about 90% of its clients choose the full blocking mode. 

One key factor contributing to this accomplishment is Fastly’s exclusive SmartParse technology, which enhances anomaly detection without needing signatures.

Top Features of Fastly:


The core purpose of SmartParse is to enable quick decision-making during request assessment and identify potential malicious payloads through context and execution analysis. As a result, expanding protection becomes seamless, freeing you from the usual maintenance burdens associated with other WAFs.

Network Learning Exchange (NLX)

Fastly sets itself apart with the Network Learning Exchange (NLX), a valuable IP reputation feed derived from verified data on malicious activities gathered from Signal Sciences customers. NLX is proficient in identifying attack patterns across the customer network, enabling early warning alerts that help spot potential threats before they become malicious website activities.

Here are a few cons of Fastly WAF:

Rate limiting

This limitation could be a major concern for high-profile or large-scale resources. The availability of advanced rate limiting, essential for protecting against excessive traffic and misuse, is restricted to the Premier platform and specific package offerings. Regrettably, the Professional and Essential platforms do not include this feature.

If you’re looking for budget-friendly DDoS protection and API security options, Fastly may not be the ideal choice as an alternative to Azure WAF.

Managed Service

Suppose you’re looking for a managed WAF that provides features like virtual patches, DDoS monitoring, latency monitoring, and the flexibility to create custom workflow-based bot rules. In that case, you’ll need to select the Ultimate plan, as these services are not included in the Starter and Advantage plans.


If you’re seeking a managed WAF on a limited budget, AppTrana stands as your only choice.

Cloudflare is a solid choice if you’re looking for an Azure alternative on a tight budget. As your needs expand, pricing differences between Cloudflare and larger WAAP providers like Akamai and Imperva become less pronounced. Starting a trial helps assess WAF compatibility with your application.

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