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Fortinet FortiWeb vs The Fastly Next-Gen WAF (powered by Signal Sciences) comparison

 

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

Fortinet FortiWeb
Ranking in Web Application Firewall (WAF)
1st
Average Rating
8.0
Reviews Sentiment
6.7
Number of Reviews
122
Ranking in other categories
No ranking in other categories
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 January 2026, in the Web Application Firewall (WAF) category, the mindshare of Fortinet FortiWeb is 8.1%, up from 7.9% compared to the previous year. The mindshare of The Fastly Next-Gen WAF (powered by Signal Sciences) is 1.2%, up from 0.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF) Market Share Distribution
ProductMarket Share (%)
Fortinet FortiWeb8.1%
The Fastly Next-Gen WAF (powered by Signal Sciences)1.2%
Other90.7%
Web Application Firewall (WAF)
 

Featured Reviews

HameedAhmed - PeerSpot reviewer
Joint Director at PAA
Security threats have been reduced through seamless deployment and strong integration with other tools
I have used Fortinet FortiWeb's integration features. We have easily integrated all of the applications with the product. Most of the applications we are using are in-house built. My technical team is looking after the best features. I have not used it extensively for maybe two and a half years. I have been involved in the installation, but I am not actually using the product. I work with it from time to time but not extensively. I would assess Fortinet FortiWeb's adaptive machine learning and artificial intelligence as having new patches installed regarding artificial intelligence, but when we bought it, I think the learning feature was there. Now they have installed artificial intelligence features through patches. We have a complete portfolio of Fortinet in our organization, including FortiMail, Fortinet FortiWeb, and FortiGate, along with multi-factor authentication. All of the products are from Fortinet. Fortinet tools integrate with each other and work in conjunction. I think Fortinet FortiWeb has helped us meet regulatory compliance because we are not a regulatory organization, but our sister organization is regulatory. We have regulatory compliance with the International Civil Aviation Authority, whose audit teams have checked our data center and these security products, and they are satisfied with us. The question about leveraging Fortinet FortiWeb's automated policy management does not pertain to my domain because I am not so technical, but I am in a management role now. My engineer is more technical than me. I would rate this product an eight point five out of ten.
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

"FortiWeb offers machine learning in the latest product. This fixed many problems. There are no false negatives."
"You have the ability to control everything from one single dashboard."
"This product is very user-friendly."
"FortiWeb is easy to operate with a reasonably high level of protection. FortiWeb provides multiple deployment options with a physical or virtual (FortiWeb-VM) appliance, and acts either as a reverse/transparent proxy or out-of-band. It is also available on AWS and Azure."
"FortiWeb identified potential DDoS attacks and suspicious domain activity, showcasing the value of its machine-learning capabilities."
"All the features that FortiGate contains are very suitable for our business. We work with other products in Fortinet, FortiWeb, FortiSandbox, FortiMail, and FortiCache. We use all UTM features like self-encryption, encryption, all UTM features."
"Both the internal firewall management and the cloud can be managed by a single console."
"The fact that I can log into the platform and see everybody, see logs, authentication failure, and see everything on one platform, is the most valuable feature."
"When configuring a web application firewall using Signal Sciences, we configure a rule whereby no one except a few people can access the application."
"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."
"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."
"The product's most valuable feature is its ability to set up the rules easily."
 

Cons

"The dashboard evaluating the performance of each application connected to the web app's firewall is quite helpful, but the tool is only available in application performance management. So I think if Fortinet could better integrate that particular feature, it would add a lot of value to the product."
"The tool's price and performance are areas of concern where improvements are required."
"The solution could improve by providing more integration with solutions other than the Fortinet family."
"The improvement needed is in their response time. Now it takes longer, and they talk about SLA and 48-hour response times."
"FortiGate could be improved on the security end because we've had some incidents with the customer. Otherwise, there is no problem."
"If some of my customers want to migrate from F5 to Fortinet Firewall, or the Fortinet WAF solution, there are some migration issues since I cannot migrate all the elements quickly using Fortinet Firewall."
"Fortinet WAF came out recently, and there is not much feedback about customer experience. For each project, customers ask about the scenarios and references of the customers who have implemented this solution, which we don't have. They need to simplify the customer experience and provide more information so that we can propose Fortinet Fortiweb as a WAF solution to customers and convince them. They need to improve their service and training. We need good training to implement and use it properly and know more about it. We still don't know much about Fortinet WAF. We didn't get any proper training sessions. Other vendors like Cisco, Palo Alto, Check Point, and Barracuda provide such sessions. Whenever we receive a request from a customer for this solution, we just give the price. We don't propose this solution because we don't know much about it. We propose whatever we are familiar with and what is supported."
"I had some small problems when I was upgrading firmware. After the upgrade, some of my certificates were deleted.​"
"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."
"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."
"Fastly don't support caching for China users. That's the only feature lacking compared to Akamai."
"The UI is not very intuitive and could be better."
 

Pricing and Cost Advice

"We are on an annual license for this solution and the price is approximately €100."
"There are no licensing costs."
"Cheaper than others."
"The maintenance fee for this product could be improved."
"FortiWeb has a good presence because of its price."
"The solution is cheaper compared with other solutions. It has a yearly license."
"The license cost depends on the size of the box or the size of the solution. It can go from €200 Euros to a few hundred thousand Euros a year depending on your size."
"There are no costs in addition to the standard licensing fees."
"Signal Sciences is pretty cheap compared to other solutions."
"The product has an affordable cost."
"The pricing is 50% less than Akamai."
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Top Industries

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

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business60
Midsize Enterprise27
Large Enterprise36
No data available
 

Questions from the Community

What do you like most about Fortinet FortiWeb?
The WAF profiles has been effective at mitigating web-based threats.
What is your experience regarding pricing and costs for Fortinet FortiWeb?
The pricing for Fortinet FortiWeb varies with different models having different prices. It depends on the requirement. For VM machines, the price increases based on CPU configurations of 2, 4, or 8...
What needs improvement with Fortinet FortiWeb?
There is room for improvement in Fortinet FortiWeb. The team was only from FortiGate itself. They are making new firmware versions and releasing them before checking, which leads to many bugs in th...
What do you like most about Signal Sciences?
The product's most valuable feature is its ability to set up the rules easily.
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-making process.
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 is hard to navigate unless you are very familiar with it.
 

Also Known As

FortiWeb Web Application Firewall (WAF)
Signal Sciences Next-Gen WAF, Signal Sciences RASP
 

Overview

 

Sample Customers

Lush, Barnabas Health, Options, Riverside Healthcare, Hillsbourough County Schools, Columbia Public Schools, Schiller AG
Chef, Adobe, Datadog, Etsy, GrubHub, Vimeo, SendGrid, Under Armour, Duo, AppNexus
Find out what your peers are saying about Fortinet FortiWeb vs. The Fastly Next-Gen WAF (powered by Signal Sciences) and other solutions. Updated: December 2025.
881,082 professionals have used our research since 2012.