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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
Sponsored
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
76
Ranking in other categories
CDN (1st), Distributed Denial-of-Service (DDoS) Protection (1st), Managed DNS (1st), Cloud Security Posture Management (CSPM) (13th)
F5 Advanced WAF
Average Rating
8.6
Reviews Sentiment
7.2
Number of Reviews
69
Ranking in other categories
Web Application Firewall (WAF) (2nd)
The Fastly Next-Gen WAF (po...
Average Rating
7.6
Reviews Sentiment
7.1
Number of Reviews
3
Ranking in other categories
Web Application Firewall (WAF) (28th)
 

Featured Reviews

Carlos Alam Hernandez Baruch - PeerSpot reviewer
Fast and secure deployments simplify operations for government and fintech clients
It is a fast and secure DNS. It is very easy to deploy, and my customers are happy with this tool. Additionally, the CDN performance in Mexico is excellent, providing fast service and tools. It offers reliability during high-traffic periods, ensuring no impact on the environment. It helps my clients avoid using on-premise boxes, simplifying operations as they only use the prices on Cloudflare.
Ahmed Moamen - PeerSpot reviewer
Protects applications with versatile authentication features
F5 offers a versatile solution that can be integrated with APM in cases where integration with an external IDB is needed. It is useful for authentication backup if the on-prem directory service is unavailable. Additionally, its WAF functionality is valuable for protecting applications from attacks. It is a versatile and strong solution that's easy to understand and deploy.
Shashank N - PeerSpot reviewer
Provides good stability, but the agent-based approach could be more convenient
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. Additionally, the agent-based approach presents challenges with managing agents across versions and dependencies on specific application platforms like Apache or NGINX, leading to compatibility issues and complexity in integration. This agent-based system proved particularly difficult to manage.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"It is easier to configure and develop documentation to see how we have configured firewalls."
"Cloudflare has many features."
"Its ease of integration with Office 365 and the fact that it's a good product compared to what I had before"
"What I like best about Cloudflare is that my company can use it to trace and manage applications and monitor traffic. The solution tells you if there's a spike in traffic. Cloudflare also sends you a link to check your equipment and deployment and track it through peering, so it's a valuable tool."
"We're using dynamic components to build flexible pages to create and manage Git merge requests for code and reviews."
"The solution offers the flexibility to control configuration rules."
"The most valuable features of the solution are performance and security."
"It's a great product because it's scalable, has great coverage, and is mature with good defenses against DDoS attacks."
"F5 Advanced WAF has very good stability and scalability. Its initial setup was straightforward."
"The most valuable features of F5 Advanced WAF are the overall capabilities, there is not a comparable solution on the market."
"It also has antivirus and DDoS mitigation capabilities. We have enabled these features."
"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."
"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."
"I like all of the features, but the main one is the attack signatures."
"The most valuable features of F5 Advanced WAF are the balancer and you can change policies very easily."
"WAF functionality is valuable for protecting applications from attacks."
"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."
"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 timing aspect can lead to it being considered overpriced. This is a particular concern we have with Cloudflare, as they may struggle with accurately detecting the client."
"Integration involving API with other products could be more user-friendly."
"Cloudflare could be improved by introducing a mid-tier pricing option."
"The product needs to improve its automation."
"Although I think it's quite good, it doesn't provide me with all the features I would expect to have if I were using Imperva."
"The pricing could be improved."
"It should be easier to collect the logs with companies like Sumo. However, based on my discussions with the salespeople, I understand that's how they make their money. With the enterprise product, they want people doing those kinds of enterprise features to do the logging. They want them to pay a lot of money, and that's where I have an issue with them. That should be a default. You should be able to get the log no matter what. The logging should be universal."
"In the last two years, there has been a certain amount of downtime when using the VDM."
"One area for improvement in the product is its SSO integration, which posed challenges and required significant effort to resolve."
"Most customers encounter stability issues with the product's Big-IP logs."
"While F5 Advanced WAF does limit the number of partners in certain regions to ensure successful business transactions, they could also benefit from expanding their partnerships and making it easier for more people to learn about and become experts in F5 Advanced WAF. By doing so, they could increase the reach and exposure of their solution, similar to how Cisco has become widely recognized in the security industry."
"Support is a little slow."
"The deployment side is quite complex."
"They could provide better pricing."
"One improvement for AOF could be focusing on enhancing its AI engine to make it more mature."
"The solution should include RASP for another level of protection at the code itself."
"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."
"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

"There are no additional costs beyond the standard licensing fees."
"I believe their performance has improved, but I'd like to refrain from discussing the pricing aspect related to the cloud. The pricing, in my opinion, could be simplified, and I think they should consider reevaluating the pricing for support, as it can be quite high. At times, this cost can make it challenging to choose CARFAGuard or opt for the support."
"So far I use free tier and happy with it. You can subscribe to business package if needed."
"That is one of the great features. I was able to access the majority of the features and services for free."
"The solution has many features but there are ones that you need to pay for. Sometimes you have to find out which is available for free and which you have to pay for."
"The solution is expensive when compared to other products but offers unlimited bandwidth."
"I think the pricing is competitive. I think as far as licensing is concerned it's pretty straightforward because it's based on domain. It's just that sometimes domains could be tricky with some customers."
"A free version of the solution is available."
"F5 bundles up services and the bundle is what you pay for rather than individual components."
"F5 Advanced WAF technical support comes at a cost, and it's expensive."
"I think the price is very high."
"Licensing fees for this solution are paid on a yearly basis."
"A yearly license for F5 Advanced WAF is expensive."
"The solution is very expensive so should only be used in the right environment."
"There is a perpetual license that comes with your hardware. There is also an additional fee for support."
"The price of F5 Advanced WAF could improve it is expensive."
"Signal Sciences is pretty cheap compared to other solutions."
"The product has an affordable cost."
"The pricing is 50% less than Akamai."
report
Use our free recommendation engine to learn which Web Application Firewall (WAF) solutions are best for your needs.
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Top Industries

By visitors reading reviews
Computer Software Company
15%
Comms Service Provider
11%
Financial Services Firm
10%
Manufacturing Company
7%
Financial Services Firm
15%
Computer Software Company
14%
Government
8%
Comms Service Provider
6%
Computer Software Company
13%
Manufacturing Company
11%
Healthcare Company
10%
Financial Services Firm
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

Which is the best DDoS protection solution for a big ISP for monitoring and mitigating?
Cloudflare. We are moving from Akamai prolexic to Cloudflare. Cloudflare anycast network outperforms Akamai static GR...
Which would you choose - Cloudflare DNS or Quad9?
Cloudflare DNS is a very fast, very reliable public DNS resolver. It is an enterprise-grade authoritative DNS service...
What do you like most about Cloudflare?
Cloudflare offers CDN and DDoS protection. We have the front end, API, and database in how you structure applications.
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 needs improvement with F5 Advanced WAF?
I do not have anything in mind right now that needs improvement. Generally, it works well. If we need any specific fe...
What do you like most about Signal Sciences?
The product's most valuable feature is its ability to set up the rules easily.
What needs improvement with Signal Sciences?
Fastly don't support caching for China users. That's the only feature lacking compared to Akamai.
 

Also Known As

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

Overview

 

Sample Customers

Trusted by over 9,000,000 Internet Applications and APIs, including Nasdaq, Zendesk, Crunchbase, Steve Madden, OkCupid, Cisco, Quizlet, Discord and more.
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: July 2025.
863,901 professionals have used our research since 2012.