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Microsoft Azure Application Gateway vs The Fastly Next-Gen WAF (powered by Signal Sciences) comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Jan 1, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Cloudflare Web Application ...
Sponsored
Ranking in Web Application Firewall (WAF)
6th
Average Rating
8.6
Reviews Sentiment
7.4
Number of Reviews
26
Ranking in other categories
No ranking in other categories
Microsoft Azure Application...
Ranking in Web Application Firewall (WAF)
7th
Average Rating
7.4
Reviews Sentiment
6.8
Number of Reviews
50
Ranking in other categories
Application Delivery Controllers (ADC) (7th)
The Fastly Next-Gen WAF (po...
Ranking in Web Application Firewall (WAF)
25th
Average Rating
7.6
Reviews Sentiment
4.8
Number of Reviews
4
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of April 2026, in the Web Application Firewall (WAF) category, the mindshare of Cloudflare Web Application Firewall is 4.7%, down from 7.2% compared to the previous year. The mindshare of Microsoft Azure Application Gateway is 4.1%, down from 9.8% compared to the previous year. The mindshare of The Fastly Next-Gen WAF (powered by Signal Sciences) is 1.2%, up from 0.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF) Mindshare Distribution
ProductMindshare (%)
Cloudflare Web Application Firewall4.7%
Microsoft Azure Application Gateway4.1%
The Fastly Next-Gen WAF (powered by Signal Sciences)1.2%
Other90.0%
Web Application Firewall (WAF)
 

Featured Reviews

DB
CTO at PlayNirvana
Advanced security reporting has protected high-traffic betting platforms from constant attacks
I don't see room for improvement to Cloudflare Web Application Firewall. One thing I don't know much about because we have a dedicated IT team for that, and I'm not involved with Cloudflare much anymore. But if I were to compare them to F5, I would like to see more features that F5 offers. F5 has an option to bring the whole infrastructure, the whole WAF and all their packages, Bot Management, and everything else on your infrastructure. You need to install certain services from their side, and then you can choose if you would like requests to hit your servers immediately or if requests need to be proxied through F5 backbone. That would be a nice addition because we have 90% of the traffic as legit traffic coming from whitelisted servers. If it comes from whitelisted servers, I don't need to go every request through the backbone; I could easily just IP whitelist everything. Then I could maybe have Bot Management on my infrastructure that drastically reduces the price of Cloudflare. I would like to see Push CDN more improved in the next release of Cloudflare Web Application Firewall. And maybe something similar to Pushpin that Fastly has, which is an option where you can push messages that then can be scaled globally over the network. From our perspective, if we have a listener that listens for stock updates, I would just need to have one processor that pushes those updates to the Cloudflare API, and then Cloudflare would broadcast that message to all listeners. Cloudflare will check the order of the message, and if you, as a customer, are not connected or have some kind of network issue, when you reconnect, you will receive the latest state and missing updates.
SS
Cloud Specialist at a tech services company with 10,001+ employees
Mutual TLS has secured our web services and now needs broader protocol support
The most valuable feature we have found in Microsoft Azure Application Gateway is mutual TLS. We find mutual TLS valuable because we can verify the client securely by setting up the trust certificate of the client, and also if we do it at the client side as well. This successfully develops mutual trust, ensuring that we know the client who is calling our service is a legitimate client. That is a very nice feature.Microsoft Azure Application Gateway has helped manage our traffic efficiently because we have many web services that we can put behind the same URL, and we can have different URLs with the same Application Gateway with a limited number of listeners. We can do host-based routing as well as URL-based routing or path-based routing. It supports both, so we can have even a single URL supporting many applications, or we can have different URLs for different applications respectively. We have both use cases.
reviewer2161107 - PeerSpot reviewer
Staff Engineer at a retailer with 1,001-5,000 employees
Room for improvement with user interface while competitive pricing impresses
It is managed through Infrastructure as Code, so all configurations can be managed in the code itself, which is beneficial. Because it uses rules, it is easy to set up, and we have many different sites where the configurations are straightforward. Though the UI is not very interactive, which is a downside, we can manage many things. The UI is not very intuitive and could be better. However, we manage all the configurations through code, which is easy to maintain. It has extensive anomaly detection capabilities, so the traffic is classified into several categories where thresholds can be defined and customized based on false positives and false negatives. This is advantageous because you do not need to tweak it very often. Once you set it up, an audit once a quarter would suffice. Because The Fastly Next-Gen WAF (powered by Signal Sciences) is API-driven, we have integrations with the CI/CD pipeline through GitHub Actions, making it easy to integrate.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"I have not had any issues with this solution, and I would recommend it to others who are interested in using it."
"It's pretty convenient and pretty easy to set up and run. And then kind of for static content, it also offers caching."
"The stability of Cloudflare Web Application Firewall deserves a perfect 10 out of 10."
"Someone with a basic understanding of networking and security will be able to implement the firewall's basic features within 15 minutes."
"The product has improved our security posture by blocking bad actors."
"The rate limiting features and customizations in terms of URL match and applying policies are valuable to me."
"In general, it's a very good product: the solution is very stable, the performance is great, the product offers very good scalability, the pricing is very reasonable, the installation is very straightforward and quite simple, and technical support has a very fast response time and is helpful."
"It is a SaaS solution unlike much of the competition."
"Some of the key features of this solution are the low-level maintenance required, floating proxy service, and load balancing."
"It is a scalable solution...The installation phase of Microsoft Azure Application Gateway is very easy."
"Load balancing and web application firewall features are the most valuable."
"It has a filter available, although we are not currently using it because it is not part of our requirements, but it is a good option and when it becomes part of our requirements we will definitely use it."
"We can control what rules should be used and what should be disabled."
"The most valuable feature of Microsoft Azure Application Gateway is its ease of use."
"The simplicity of the solution and its ability to integrate easily with others are its most valuable aspects."
"Application Gateway automatically redirects unwanted users and takes care of the security aspect. It also handles the performance side of things, which is why we use it."
"Because The Fastly Next-Gen WAF (powered by Signal Sciences) is API-driven, we have integrations with the CI/CD pipeline through GitHub Actions, making it easy to integrate."
"Fastly (Signal Sciences) integrates and tags the intermittent traffic based on patterns. It generates signals and provides them in a dashboard where we can view them and decide whether to allow or deny traffic. It's a more advanced and easy-to-navigate dashboard."
"When configuring a web application firewall using Signal Sciences, we configure a rule whereby no one except a few people can access the application."
"The product's most valuable feature is its ability to set up the rules easily."
 

Cons

"We have noticed some latency when the call goes through the firewall. That could be improved."
"The learning curve was steep initially."
"The user interface is very simple and straightforward, but users need knowledge about DNS to accomplish tasks."
"The notification part could be improved. It's very much connected to Web Application Firewall, rate-limiting, and DDoS protection."
"The reporting could be more granular."
"I have experienced some difficulties with Cloudflare's support as a customer based in India."
"The reporting could be improved if it were more granular."
"The product can improve by having more multitenancy capability, which is currently not available."
"One of the challenges we faced was the solution does not support any other PCP protocols apart from HTTP and HTTPS."
"The solution can sometimes feel a little cumbersome unless you're a professional infrastructure person."
"The tool's pricing could be improved."
"Microsoft Azure Application Gateway is harder to manage than Imperva. It is not intuitive and stable compared to other products."
"The pricing of the solution could be improved. Right now, it's a bit expensive."
"The monitoring on the solution could be better."
"We got the feeling that this product wasn't stable or good enough for us."
"The pricing of the solution could be improved. Right now, it's a bit expensive."
"The UI is not very intuitive and could be better."
"The areas that could be improved in Signal Sciences include the effectiveness of rules, as many didn't function optimally and required custom rule-writing to address bypasses for WAF."
"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."
"Fastly don't support caching for China users. That's the only feature lacking compared to Akamai."
 

Pricing and Cost Advice

"The pricing model is very straightforward compared to the competition. You just pay per month for the product and usage."
"We pay $210 per month for CloudFlare WAF."
"Cloudflare Web Application Firewall is more affordable than other solutions."
"It starts at $20 and can easily go up to $200 monthly"
"The solution's pricing option needs to be more transparent for enterprise clients."
"The annual licensing fee is $10,000 USD."
"What's my experience with pricing, setup cost, and licensing? I believe the pricing is not the best, but it's reasonable and acceptable. We also use the McAfee system in parallel. In terms of pricing, its okay - not great, but not bad either. It falls in the middle, which is acceptable. In terms of support licensing, last time, we were searching for a solution, and we considered products from resellers rather than directly from the cloud provider. However, the pricing we encountered was exceptionally high. As a result, we are inclined to select support from the reseller."
"It is not too pricey."
"Every solution comes with a license and cost. Microsoft provides the license and the total cost is for the maintenance every year."
"Regarding pricing for Azure Application Gateway, I would rate it at seven."
"The price of the solution can be reduced a bit."
"Microsoft Azure Application Gateway is a pretty affordable product. My company needs to make yearly payments towards the licensing costs of the solution. The additional costs apart from the licensing costs of the solution vary."
"The solution is paid monthly. The solution is highly expensive."
"There is a need to pay a fixed price per month to use the product. There are no additional payments to be made to Microsoft apart from the charges paid towards the monthly licensing costs attached to the solution."
"We use the tool's basic subscription. Its licensing costs are monthly."
"The solution is cheaper than Imperva. I rate it four to five out of ten."
"The pricing is 50% less than Akamai."
"Signal Sciences is pretty cheap compared to other solutions."
"The product has an affordable cost."
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Top Industries

By visitors reading reviews
Construction Company
17%
Financial Services Firm
9%
Comms Service Provider
8%
Computer Software Company
8%
Computer Software Company
11%
Financial Services Firm
10%
Manufacturing Company
9%
Government
8%
Manufacturing Company
13%
Financial Services Firm
9%
Retailer
9%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise6
Large Enterprise6
By reviewers
Company SizeCount
Small Business22
Midsize Enterprise6
Large Enterprise24
No data available
 

Questions from the Community

What needs improvement with Cloudflare Web Application Firewall?
I don't see room for improvement to Cloudflare Web Application Firewall. One thing I don't know much about because we...
What is your primary use case for Cloudflare Web Application Firewall?
We are using Cloudflare Web Application Firewall's advanced reporting and analytics tools with their Zero Trust, so e...
What's the difference between Azure Front Door and Application Gateway?
We found Azure Front Door to be easily scaled and very stable. The implementation is very fast and Microsoft provides...
How does AWS WAF compare to Microsoft Azure Application Gateway?
Our organization ran comparison tests to determine whether Amazon’s Web Service Web Application Firewall or Microsoft...
What do you like most about Microsoft Azure Application Gateway?
Application Gateway automatically redirects unwanted users and takes care of the security aspect. It also handles the...
What is your experience regarding pricing and costs for Signal Sciences?
The pricing is very competitive compared to other providers. The pricing is definitely a factor in our decision-makin...
What needs improvement with Signal Sciences?
We do use it, but the UI can be improved as we mostly work through the CI/CD. It provides support, but sometimes it i...
What is your primary use case for Signal Sciences?
The CDN is for caching and The Fastly Next-Gen WAF (powered by Signal Sciences) is for protecting the servers from ma...
 

Comparisons

 

Also Known As

Cloudflare WAF
Azure Application Gateway, MS Azure Application Gateway
Signal Sciences Next-Gen WAF, Signal Sciences RASP
 

Overview

 

Sample Customers

crunchbase, udacity, marketo, okcupid, zendesk
Lilly, AccuWeather, AIRFRANCE, Honeywell
Chef, Adobe, Datadog, Etsy, GrubHub, Vimeo, SendGrid, Under Armour, Duo, AppNexus
Find out what your peers are saying about Microsoft Azure Application Gateway vs. The Fastly Next-Gen WAF (powered by Signal Sciences) and other solutions. Updated: April 2026.
891,869 professionals have used our research since 2012.