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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 November 2026, in the Web Application Firewall (WAF) category, the mindshare of Fortinet FortiWeb is 3.9%, down from 7.4% 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 FortiWeb3.9%
The Fastly Next-Gen WAF (powered by Signal Sciences)1.2%
Other94.9%
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

"Pricing and licensing are USP of this solution; deploying an appliance provides in-house control and flexibility."
"When it comes to blocking unknown threats and attacks, I would give it the highest score possible. We first started using AWS and its Web Application Firewalls. That was okay, but it was quite a manual process to keep it up to date, whereas Fortinet is always up to date, and the default rules or the modules that you can turn on are very easy to use."
"I have recently been looking at the SSL certificate features and the learning mode of the appliance. This appliance learns from the pattern of SSL attacks."
"It helps us prevent attacks on servers."
"It can scale well."
"We have had a lot of web application attacks and this product has protected us, as once it was implemented most of our problems were solved, including a DDoS attack against the seventh layer that it successfully protected us from."
"Banks have to be compliant with PCI and other things, and FortiWeb is absolutely amazing in terms of providing these reports. Otherwise, they will have to spend a lot of time on them."
"With the fear of cyber attack, the most important thing we can do is protect the web application, and FortiWeb helps us protect it from attacks like DDoS while maintaining our cyber security posture."
"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

"The documentation for the machine learning could be better. They do not provide proper documentation explaining how the solution works or how to configure it."
"Fortinet FortiWeb could improve in reference architecture for different deployment scenarios."
"They could integrate some kind of machine learning and AI facilities to automate workflows."
"In my experience, Fortinet FortiWeb could improve the intelligent features to acknowledge whether any threat or incident that's running happened. Then give us the ability to escalate it to layer 2 or layer 3 in the network operations."
"No solution is 100% secure and the security could always be worked on."
"For advanced users, it would be really useful to have access and the ability to manipulate packets. If we can access and manipulate the contents of packets, even encrypted packets... that would be powerful. Since we're looking at packets arriving at our network, we would have the private key to access those packets and their information."
"The tool's price and performance are areas of concern where improvements are required."
"I would like to see support for throughput up to 10 gbps and WAN support."
"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."
"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."
 

Pricing and Cost Advice

"FortiWeb has a good presence because of its price."
"FortiWeb Web Application Firewall is not expensive."
"The pricing is pretty good. We do pass a lot of traffic through our API servers. Something like 100 gigs of web traffic is a fair amount for reduced JSON API calls, but the cost is $50. For that peace of mind, we have thousands and thousands of customers that are protected by that $50, so it's a no-brainer."
"There's only one payment for the duration of the license. On a scale from one to five, I would rate pricing at four. I have not encountered any additional costs on my projects involving Fortinet FortiWeb."
"The solution gives us the best price to performance ratio."
"It's an expensive solution, although there are no additional costs."
"The tool is really expensive."
"The solution is a bit expensive when compared to other products."
"The product has an affordable cost."
"Signal Sciences is pretty cheap compared to other solutions."
"The pricing is 50% less than Akamai."
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Top Industries

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

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: November 2026.
920,939 professionals have used our research since 2012.