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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)
5th
Average Rating
8.6
Reviews Sentiment
7.4
Number of Reviews
26
Ranking in other categories
No ranking in other categories
F5 Advanced WAF
Ranking in Web Application Firewall (WAF)
3rd
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
71
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 May 2026, in the Web Application Firewall (WAF) category, the mindshare of Cloudflare Web Application Firewall is 4.7%, down from 7.1% compared to the previous year. The mindshare of F5 Advanced WAF is 5.3%, down from 10.3% compared to the previous year. The mindshare of The Fastly Next-Gen WAF (powered by Signal Sciences) is 1.3%, 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 (%)
F5 Advanced WAF5.3%
Cloudflare Web Application Firewall4.7%
The Fastly Next-Gen WAF (powered by Signal Sciences)1.3%
Other88.7%
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.
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

"This is a good product; it's reliable and scales well."
"The integration of Cloudflare with Cloud Suite is its most valuable feature."
"There is a huge signature repository"
"This solution does a good job of preventing web application attacks, SQL injections, and cross-site scripting attacks."
"Someone with a basic understanding of networking and security will be able to implement the firewall's basic features within 15 minutes."
"The initial setup process is simple."
"For us, the key feature of Cloudflare is DDoS protection and IP hiding, especially since we are a crypto company."
"The Cloudflare Web Application Firewall's most valuable feature is its ease of configuration."
"The most valuable feature of F5 Advanced WAF is its extensive set of capabilities for application protection, including DDoS prevention, and its ability to work with Pentesters and external scanners to observe user activity and eliminate false positives."
"It provides web application security and reduces bot attacks."
"I would recommend this solution to others who are interested in using it."
"I like all of the features, but the main one is the attack signatures."
"Good dashboard and reporting."
"I like them because I like the security solution. They get extra marks compared to other solutions or competitors. There are more features than any other product I can think of. They're always monitoring, and the security features offer more than other, lesser products."
"Customers find the load balancer feature as the most valuable."
"My favorite feature of F5 is the ability to play around with the ciphers. I also like the ability to have an immediate display of the support IDs when a real blockage occurs. The protection offered is great."
"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

"A key challenge arises when dealing with numerous integrations with HVAC systems. Depending on the specifics, there might be some configuration mismatches, which necessitate specific support."
"The reporting could be improved if it were more granular."
"It would be ideal if the solution offered better log integration and more integration with different platforms."
"Cloudflare Web Application Firewall should include port forwarding features."
"Its stability could be better."
"The learning curve was steep initially."
"I have experienced some difficulties with Cloudflare's support as a customer based in India."
"Their documentation could be better. They don't have documentation that explains everything well. They have documentation for everything you're looking for, but they lack a single piece of documentation to tie everything together. As a new user or beginner, it took us a little bit of time to figure out how to put all these things in place."
"The reporting could be clearer and embedded to include our movement data."
"F5 needs to improve API protection with a single F5 solution, without requiring additional modules."
"The solution's dashboard could be improved."
"For me, an area for improvement in F5 Advanced WAF is the reporting as it isn't so clear."
"The interface is old-looking, it's not modern, which is why it's not always comfortable to use."
"The overall price of F5 Advanced WAF could improve."
"The tool needs to improve its pricing."
"The DDoS capabilities should be enhanced."
"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."
"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."
 

Pricing and Cost Advice

"The annual licensing fee is $10,000 USD."
"We pay $210 per month for CloudFlare WAF."
"The solution's pricing option needs to be more transparent for enterprise clients."
"It is not too pricey."
"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."
"The solution is expensive."
"Cloudflare Web Application Firewall is more affordable than other solutions."
"Cloudflare offers different types of subscriptions for businesses, enterprises, and personal users, and the pricing is negotiable."
"There are various plans available for Fortinet FortiWeb Cloud WAF as a Service, including a trial version."
"The price of the solution is reasonable when compared with other products, such as FortiWeb. I am very satisfied with the price."
"After buying the program, you just pay for the support every year."
"There is a perpetual license that comes with your hardware. There is also an additional fee for support."
"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 would rate the pricing as seven out of ten"
"F5 Advanced WAF technical support comes at a cost, and it's expensive."
"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."
"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
9%
Computer Software Company
7%
Financial Services Firm
15%
Computer Software Company
10%
Government
8%
Comms Service Provider
8%
Manufacturing Company
13%
Retailer
9%
Financial Services Firm
9%
Comms Service Provider
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 Business27
Midsize Enterprise15
Large Enterprise30
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 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?
The pricing for F5 Advanced WAF is a bit higher, but not that high. I would say for a good amount of revenue-generati...
What needs improvement with F5 Advanced WAF?
On the features I wish existed, Big-IP Advanced WAF is primarily an on-premises solution and in that solution, there ...
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: April 2026.
892,776 professionals have used our research since 2012.