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F5 Advanced WAF 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)
7th
Average Rating
8.4
Reviews Sentiment
7.4
Number of Reviews
25
Ranking in other categories
No ranking in other categories
F5 Advanced WAF
Ranking in Web Application Firewall (WAF)
2nd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
73
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 February 2026, in the Web Application Firewall (WAF) category, the mindshare of Cloudflare Web Application Firewall is 5.6%, down from 6.6% compared to the previous year. The mindshare of F5 Advanced WAF is 7.5%, down from 10.3% 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) Market Share Distribution
ProductMarket Share (%)
F5 Advanced WAF7.5%
Cloudflare Web Application Firewall5.6%
The Fastly Next-Gen WAF (powered by Signal Sciences)1.2%
Other85.7%
Web Application Firewall (WAF)
 

Featured Reviews

AU
IT Manager at Amla Commerce
Effectively protects clients from automated threats and ensures global security
I cannot say much about areas of improvement for Cloudflare Web Application Firewall because I haven't gone through deep understanding of it, as I am still learning. However, they need to improve their support because getting a response for basic requests took around 48 hours, which is too long. If I took 48 hours to answer a request at my company, it would be a tough time to see or address the issue, and it would be frustrating.
Kallamuddin Ansari - PeerSpot reviewer
Cyber Security Consultant at ProTechmanize
Application security has protected critical banking services while policy learning minimizes false blocks
F5 Advanced WAF performs well overall, but I have noticed some points that could enhance the solution. Initially, policy tuning could be simpler, as while the learning engine is powerful, initial tuning still requires experienced engineers, which can be challenging for new teams due to the complexity of options and parameters. A more guided and simple tuning workflow would help reduce the learning curve. Additionally, tighter native integration with SIEM or SOAR tools would simplify correlation and investigations for security teams, although log exports are available. Overall, these are not blockers, merely enhancement opportunities, and once tuned, F5 Advanced WAF is very stable and reliable; improving usability, reporting, and onboarding would make it even more effective for larger environments.
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

"It's pretty convenient and pretty easy to set up and run. And then kind of for static content, it also offers caching."
"The rate limiting features and customizations in terms of URL match and applying policies are valuable to me."
"The Cloudflare Web Application Firewall's most valuable feature is its ease of configuration."
"Technical support has a very fast response time and they are helpful."
"The initial setup process is simple."
"Caching is the most valuable feature of Cloudflare Web Application Firewall."
"The product has a valuable security control functionality."
"It is a SaaS solution unlike much of the competition."
"With F5 Advanced WAF, it was protection for online publications and for our customers that caused us to choose the platform."
"It's flexible and powerful, and the users can input their own rules to the system."
"It can scale."
"The most valuable feature of F5 Advanced WAF is its ability to have a pool of resources that can distribute your traffic, and that is a plus for me. My company tried to look into a competitor, Imperva, but it was lacking that capability, so F5 Advanced WAF outperforms Imperva."
"This solution is an enterprise-class firewall that provides both load-balancing and security."
"The solution's most valuable features include application DDoS protection, bot blocking, and HTTP header verifications."
"This solution inspects your traffic and based on that, automatically create distinct qualities for you, so you can add this to the policy already created. That's what I like most."
"The solution isn't too expensive. The license allows you to license what you need and leave out what you don't need."
"The product's most valuable feature is its ability to set up the rules easily."
"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."
"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."
 

Cons

"Cloudflare Web Application Firewall should improve visibility for a customer."
"The reporting could be more granular."
"If they add logs history within the Cloudflare offering, that would be a great benefit."
"The product can improve by having more multitenancy capability, which is currently not available."
"The dashboard could be more user-friendly."
"It would be ideal if the solution offered better log integration and more integration with different platforms."
"The accuracy of the Cloudflare Web Application Firewall could be improved by reducing the number of false-negative alerts."
"The ModSecurity core rules need to be updated."
"This solution can be made more user-friendly."
"The user interface (UI) seems a bit outdated. Making it more user-friendly would be beneficial."
"I would like to see improved features in the F5 Advanced WAF solution, especially with a focus on enabling Kubernetes fully."
"For me, an area for improvement in F5 Advanced WAF is the reporting as it isn't so clear. The vendor needs to work on the reporting capability of the solution. What I'd like to see in the next release of F5 Advanced WAF is threat intelligence to protect your web application, particularly having that capability out-of-the-box, and not needing to pay extra for it, similar to what's offered in FortiWeb, for example, any request that originates from a malicious IP will be blocked automatically by FortiWeb. F5 Advanced WAF should have the intelligence for blocking malicious IPs, or automatically blocking threats included in the license, instead of making it an add-on feature that users have to pay for apart from the standard licensing fees."
"The contextual-based component needs a lot of help to catch up with the next-gen products."
"The solution should include RASP for another level of protection at the code itself."
"The BNS module needs improvement."
"They should work on the virtualization of NGINX."
"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."
"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."
"Fastly don't support caching for China users. That's the only feature lacking compared to Akamai."
 

Pricing and Cost Advice

"Cloudflare Web Application Firewall is more affordable than other solutions."
"The pricing model is very straightforward compared to the competition. You just pay per month for the product and usage."
"The solution's pricing option needs to be more transparent for enterprise clients."
"Cloudflare offers different types of subscriptions for businesses, enterprises, and personal users, and the pricing is negotiable."
"It starts at $20 and can easily go up to $200 monthly"
"The annual licensing fee is $10,000 USD."
"The solution is expensive."
"We pay $210 per month for CloudFlare WAF."
"There is a perpetual license that comes with your hardware. There is also an additional fee for support."
"Licensing fees for this solution are paid on a yearly basis."
"The way we deployed it, I would rate it a four out of five in terms of pricing."
"It is a little bit costly, but it has all the features that are required."
"F5 bundles up services and the bundle is what you pay for rather than individual components."
"F5 Advanced WAF is not a cost-effective solution. Although they are attempting to reduce prices with their VE and cloud options, they are more expensive than other solutions. The solution is more expensive on average."
"Its price is fair. We have done a couple of deals where they were able to give some kind of discount to the customers. The price was initially high for the customers, but after a couple of negotiations, it came within their budget. They were happy with that."
"I am not sure about pricing but licenses are available on Google."
"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
Computer Software Company
12%
Manufacturing Company
9%
Financial Services Firm
8%
Comms Service Provider
7%
Financial Services Firm
13%
Computer Software Company
12%
Government
9%
Manufacturing Company
7%
Manufacturing Company
13%
Retailer
10%
Computer Software Company
8%
Financial Services Firm
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business15
Midsize Enterprise6
Large Enterprise6
By reviewers
Company SizeCount
Small Business26
Midsize Enterprise15
Large Enterprise31
No data available
 

Questions from the Community

What needs improvement with Cloudflare Web Application Firewall?
I don't really use the rule-based logic feature or utilize the WAF's ability to scale as a cloud-based service. I don...
What is your primary use case for Cloudflare Web Application Firewall?
I'm using Cloudflare Web Application Firewall on all my domains and any client domains I have; I set them up with a C...
What do you like most about F5 Advanced WAF?
It's a fairly easy-to-use and user-friendly tool. My administrators and team also like its ability to customize the r...
What is your experience regarding pricing and costs for F5 Advanced WAF?
Regarding the price, I think the cost is a bit higher compared to others. Earlier we were using Radware, and compared...
What needs improvement with F5 Advanced WAF?
In terms of additional features I would like to see from them in the future, I think the GTM is a bit complicated to ...
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...
 

Also Known As

Cloudflare WAF
No data available
Signal Sciences Next-Gen WAF, Signal Sciences RASP
 

Overview

 

Sample Customers

crunchbase, udacity, marketo, okcupid, zendesk
MAXIMUS, Vivo, American Systems, Bangladesh Post Office, City Bank
Chef, Adobe, Datadog, Etsy, GrubHub, Vimeo, SendGrid, Under Armour, Duo, AppNexus
Find out what your peers are saying about F5 Advanced WAF vs. The Fastly Next-Gen WAF (powered by Signal Sciences) and other solutions. Updated: February 2026.
882,207 professionals have used our research since 2012.