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Fortinet FortiWeb 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

Fortinet FortiWeb
Ranking in Web Application Firewall (WAF)
4th
Average Rating
8.0
Reviews Sentiment
6.6
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)
34th
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 September 2026, in the Web Application Firewall (WAF) category, the mindshare of Fortinet FortiWeb is 4.1%, down from 7.5% compared to the previous year. The mindshare of The Fastly Next-Gen WAF (powered by Signal Sciences) is 1.2%, up from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF) Mindshare Distribution
ProductMindshare (%)
Fortinet FortiWeb4.1%
The Fastly Next-Gen WAF (powered by Signal Sciences)1.2%
Other94.7%
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

"Some of the threat detection analytics and the filtering capabilities they give us for filtering a certain type of information that we don't want coming into the site are its valuable features. The analytics are pretty good in terms of being able to see what threats have been detected and mitigated, where they're coming from, and things like that."
"The deployment was very easy."
"The solution is easy to configure and deploy, and there is a richness in the rules and out-of-the-box tools that is not available with native firewall solutions."
"If I need something from tech support, I can get it answered within the hour."
"Deployment can be straightforward"
"It is a good option, keeping in mind pricing and features."
"FortiNet shows me the health of the entire network."
"We have found something that can adapt to our environment and that we can use for a long period of time."
"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."
"When configuring a web application firewall using Signal Sciences, we configure a rule whereby no one except a few people can access the application."
 

Cons

"The solution could offer more integration opportunities."
"For users not familiar with Fortinet, it could be beneficial to provide more user-friendly analytics and reporting."
"When there is downtime at their data center, it becomes a transit point issue for us, causing downtime in our environment as well."
"Maybe the load balancing options could be enhanced."
"Fortinet can improve their technical support, especially the response time."
"The downside to FortiWeb is it had issues integrating with HSM. They fixed the issue, however, it took a long time to fix and it wasn't pleasant."
"Fine-tuning is a room for improvement in Fortinet FortiWeb."
"I would like to see more improvements with respect to threat intelligence."
"The UI is not very intuitive and could be better."
"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."
 

Pricing and Cost Advice

"It keeps changing, but it's based on the size of the VM you buy and also the traffic throughput you want from it, whereas what we have on Azure is just the traffic throughput. You can also pay on a monthly basis from Azure. During each part of the project, it's okay to get Azure-based licensing or AWS-based licensing for FortiWeb, but over time, you would want to go with the perpetual license. You should go to Fortinet and buy the license from them. So, there is a two-step process there."
"It's an expensive solution, although there are no additional costs."
"The solution is very inexpensive when compared to F5 Advanced WAF and Avi Networks but offers the same benefits."
"The price of Fortinet FortiWeb is expensive in our Ethiopian currency."
"The licensing cost of the product is pretty high compared to other OEMs in the market."
"The license to use Fortinet FortiWeb is approximately $14,000."
"FortiWeb Web Application Firewall's pricing is suited for small or medium organizations."
"It is a cost-effective product. If you need an extra module in the product, there will be an extra cost in addition to the licensing fee."
"Signal Sciences is pretty cheap compared to other solutions."
"The pricing is 50% less than Akamai."
"The product has an affordable cost."
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Top Industries

By visitors reading reviews
Outsourcing Company
10%
Comms Service Provider
9%
Financial Services Firm
9%
Manufacturing Company
8%
Manufacturing Company
9%
Comms Service Provider
9%
Retailer
8%
Financial Services Firm
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business61
Midsize Enterprise27
Large Enterprise37
No data available
 

Questions from the Community

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 is your primary use case for Fortinet FortiWeb?
Fortinet FortiWeb is very good as a web application solution. I have been working with Fortinet FortiWeb since 2020.
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.
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 malicious traffic. They both perform different jobs and serve different purposes, ...
 

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: September 2026.
914,109 professionals have used our research since 2012.