No more typing reviews! Try our Samantha, our new voice AI agent.

F5 Advanced WAF vs The Fastly Next-Gen WAF (powered by Signal Sciences) comparison

Sponsored
 

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)
6th
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
72
Ranking in other categories
No ranking in other categories
The Fastly Next-Gen WAF (po...
Ranking in Web Application Firewall (WAF)
30th
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 June 2026, in the Web Application Firewall (WAF) category, the mindshare of Cloudflare Web Application Firewall is 4.5%, down from 7.0% compared to the previous year. The mindshare of F5 Advanced WAF is 4.7%, down from 10.2% compared to the previous year. The mindshare of The Fastly Next-Gen WAF (powered by Signal Sciences) is 1.2%, up from 0.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF) Mindshare Distribution
ProductMindshare (%)
F5 Advanced WAF4.7%
Cloudflare Web Application Firewall4.5%
The Fastly Next-Gen WAF (powered by Signal Sciences)1.2%
Other89.6%
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.
reviewer2797602 - PeerSpot reviewer
Senior Security Systems Engineer at a tech services company with 11-50 employees
Granular security policies have protected critical applications and ensure safe user and admin access
Improvements could be made regarding the log information from the backend CLI. There are enhancements needed; if a request gets blocked on the TCP layer, there should be traces or data to verify which source generated these requests, including the source and port information for initiation. These data are missing from F5 Advanced WAF. Besides that, another improvement could be refining the bot detection to minimize false positives; it should be able to verify more granularly between legitimate and non-legitimate clients. Overall, I find everything else good. A wish list feature I have is for the Technical Assistance Center (TAC) to respond more promptly. Their response time needs improvement; while they do not take excessive time, it can be enhanced, especially given it is a security product.
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

"Technical support has a very fast response time and they are helpful."
"The initial setup process is simple."
"It is configurable via API."
"There is a huge signature repository"
"This is a good product; it's reliable and scales well."
"We extensively use the solution every day. The solution is very stable; we haven’t seen any glitches."
"It's pretty convenient and pretty easy to set up and run. And then kind of for static content, it also offers caching."
"In general, it's a very good product: the solution is very stable, the performance is great, the product offers very good scalability, the pricing is very reasonable, the installation is very straightforward and quite simple, and technical support has a very fast response time and is helpful."
"What a WAF is happens to be exactly what we are using F5 WAF for: a firewall for our web applications."
"The WAF and APM are very useful, the solution has been mostly stable and reliable, and it can scale."
"The level of configurability that I get with F5 Advanced WAF solution is immense, and I have to be a bit aware of how it works and all of its features, but at the end of the day, it is all about the administration expertise that I will require to have and use it to my liking based on the kind of services that I have onboarded on my solution itself."
"In terms of F5 Advanced WAF's most valuable features, I would definitely say its stability, as F5 is one of the most stable products and either as the load balancer or the web application firewall, it is very stable."
"The ROI is very impressive as it is crucial for financial applications to be protected efficiently."
"I would recommend this solution to others who are interested in using it."
"The most valuable features of this solution are the WAF protection, Data Safe, and the seven-layer DDoS."
"The product is very stable; it is a PCI company, so there are 10,000-12,000 people using the solution, and all of the internet payments are behind the ASM for the F5."
"The product's most valuable feature is its ability to set up the rules easily."
"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."
"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."
 

Cons

"The platform's control features related to real-time authentication and response time need improvement."
"We don't even use Cloudflare Bot Management because it's too expensive; you need to pay per request, and it's much cheaper to get one or two additional machines."
"The learning curve was steep initially."
"If they add logs history within the Cloudflare offering, that would be a great benefit."
"We have noticed some latency when the call goes through the firewall. That could be improved."
"The accuracy of the Cloudflare Web Application Firewall could be improved by reducing the number of false-negative alerts."
"The solution's learning curve can still be further reduced"
"The dashboard could be more user-friendly."
"It should be a little bit easy to deploy in terms of the overall deployment session. One of our customers is a bit unhappy about the reporting options. Currently, it automatically deletes event logs after some limit if a customer doesn't have any external Syslog server. It is a problem for those customers who want to review event logs after a week or so because they won't get proper reports or event logs. They should increase the duration to at least a month or two for storing the data on the device. F5 is not a leader in Gartner Quadrant, which affects us when we go and pitch this solution. Customers normally go and take a look at such annual reports, and because F5 is currently not there as a leader, the customers ask about it even though we are saying it is good in all things. F5 is not known for something totally different or unique. They were a major player in ADP, and they are just rebranding themselves into security. They should improve or increase their marketing as a security company now. They have already started to do that, but they should do it more so that when it comes to security, customers can easily remember F5. At the moment, if we say F5, load balancing comes to mind. With rebranding and marketing, all customers should get the idea that F5 is now mainly focusing on the security part of it, and it is a security company instead of load balancing. This is the first solution that should come to a customer's mind for a web application firewall."
"I think the price is very high. This is what I hear from the customers."
"People who want to work with the device have to be pro in Linux"
"Compatibility with multiple cloud environments needs improvement. Both stability and scalability need to be improved."
"The pricing could be more flexible."
"Truthfully, they can improve a bit. Sometimes you get an engineer who is absent for two, three days and you have to call them and change engineers because the first one is not responding."
"The solution should include RASP for another level of protection at the code itself."
"Improvements could be made regarding the log information from the backend CLI; if a request gets blocked on the TCP layer, there should be traces or data to verify which source generated these requests, including the source and port information for initiation."
"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

"It starts at $20 and can easily go up to $200 monthly"
"The solution's pricing option needs to be more transparent for enterprise clients."
"The annual licensing fee is $10,000 USD."
"It is not too pricey."
"The solution is expensive."
"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."
"Cloudflare offers different types of subscriptions for businesses, enterprises, and personal users, and the pricing is negotiable."
"The pricing model is very straightforward compared to the competition. You just pay per month for the product and usage."
"There is an annual subscription for this solution."
"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."
"I rate F5 Advanced WAF's pricing a three out of ten."
"F5 Advanced WAF pricing structure should be adjusted to meet the need of small to medium-sized companies."
"It's more expensive than other solutions and depending on the modules, there can be additional fees."
"F5 bundles up services and the bundle is what you pay for rather than individual components."
"As far as the pricing of F5 Advanced WAF I would rate it a four out of five depending on what features I am looking for. Imperva is more expensive."
"The pricing of F5 Advanced WAF is more expensive than other solutions like Radware and CD18, it is quite high."
"The pricing is 50% less than Akamai."
"Signal Sciences is pretty cheap compared to other solutions."
"The product has an affordable cost."
report
Use our free recommendation engine to learn which Web Application Firewall (WAF) solutions are best for your needs.
900,125 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Construction Company
17%
Financial Services Firm
9%
Comms Service Provider
9%
Manufacturing Company
7%
Financial Services Firm
15%
Computer Software Company
9%
Comms Service Provider
9%
Government
8%
Manufacturing Company
12%
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 Enterprise16
Large Enterprise31
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 is your experience regarding pricing and costs for F5 Advanced WAF?
F5 Advanced WAF is somewhat costly compared to other vendors, but it is worth the investment due to the stability it ...
What needs improvement with F5 Advanced WAF?
Improvements could be made regarding the log information from the backend CLI. There are enhancements needed; if a re...
What is your primary use case for F5 Advanced WAF?
My main use case for F5 Advanced WAF is to protect external and internal applications from cyber attacks and to preve...
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: June 2026.
900,125 professionals have used our research since 2012.