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F5 Silverline Managed Services vs The Fastly Next-Gen WAF (powered by Signal Sciences) comparison

 

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

F5 Silverline Managed Services
Ranking in Web Application Firewall (WAF)
22nd
Average Rating
7.8
Reviews Sentiment
6.8
Number of Reviews
16
Ranking in other categories
Distributed Denial-of-Service (DDoS) Protection (13th)
The Fastly Next-Gen WAF (po...
Ranking in Web Application Firewall (WAF)
28th
Average Rating
7.6
Reviews Sentiment
7.1
Number of Reviews
3
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of July 2025, in the Web Application Firewall (WAF) category, the mindshare of F5 Silverline Managed Services is 1.2%, up from 1.1% compared to the previous year. The mindshare of The Fastly Next-Gen WAF (powered by Signal Sciences) is 1.0%, up from 0.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF)
 

Featured Reviews

Archana Heeralal - PeerSpot reviewer
A reasonably priced product with a good UI, but the navigation is difficult, and the support team takes a long time to respond
Since we use the solution’s cloud, the product has more control over the back end. The customer will not have control. It is part of the product’s feature. When we get more complex requirements or if we want to write more complex tools, the support team will have the visibility to write them because they have control. The navigation is difficult to use. The navigation should be improved. Other products are quite straightforward. If I try to implement a new application and do an onboarding, it is not very easy. We must go to one feature, inside which there will be more features. It should be simplified, and a menu should be provided.
Archana Heeralal - PeerSpot reviewer
A good solution to implement web application firewall for applications
There are some lags in Signal Sciences for the web application firewalls. Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic. There is a little bit of complexity with custom rules that should be removed. Signal Sciences should add a feature called rate limiting with multiple options, wherein I can create a rate limiting based on the cookie request or the IP.

Quotes from Members

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

Pros

"The initial setup is straightforward."
"F5 Silverline offers load balancing, flexibility, and reliability."
"It's a good front end for public infrastructure"
"The most valuable features are the configuration and configuring the process."
"The most valuable feature of F5 Silverline Managed Services is the benchmark performance."
"The most important feature is that they have seven firewall protection, to protect our web servers."
"The most valuable feature of F5 Silverline Managed Services is it becomes similar to a distributed architecture."
"The best advantage of F5 Silverline Managed Services is that it is easy to use."
"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."
"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

"I just hope the price can be cheaper."
"We'd like more AI to be used. Right now, they don't use it enough."
"The product could be improved on the global load and the integration with the other solution like Cisco and Dell. As a representor of the operation, we prefer to have one platform which can accommodate all type of integration. We are also looking for more improvements in the security policy configuration."
"There is room for improvement in the stability of the solution."
"There is a lot of room for improvement with their tech support. I am not sure F5 Silverline Managed Services can be classified as having tech support."
"We need to have support for cloud protection, which is not offered by this solution."
"In terms of the scalability, this part is always so confusing because they are checking for packet count. Also, after an attack, they said that the throughput must be from gigabits but then I check my bandwidth and it is already done in gigabits. So it is a little bit confusing."
"Automating processes could enhance F5 Silverline Managed Services."
"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

"F5 Silverline Web Application Firewall works based on your bandwidth. They look at the clean bandwidth and do the pricing. 20% of a total pipe would be a clean bandwidth. The list price or a non-negotiated price for F5 Silverline Web Application Firewall would be around $2,200 per application per year for everything that you need. When you get into an enterprise kind of a setup, they negotiate this to the last bit. I would easily take 20% on that, which would be the cost, but it should cover all your Advance WAF features, bot protection, tech campaign, etc. It is built as a package and gives you most of the capability. You don't get the mobile SDK, which is an additional license. Mobile SDK is required only if you're buying or if you have a mobile application, and you are going to instrument F5 or Imperva into your mobile appliance. This anyways would be an additional module. It doesn't come within the WAF, but it is a WAF feature."
"The price of F5 Silverline Managed Services could be reduced."
"The product’s pricing is reasonable."
"The price of F5 Silverline Managed Services could be better, they are not very flexible. The price of the solution is based on the requirements of the enterprise."
"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
Financial Services Firm
19%
Computer Software Company
13%
Insurance Company
13%
Comms Service Provider
11%
Computer Software Company
12%
Manufacturing Company
11%
Educational Organization
10%
Financial Services Firm
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

Is Citrix ADC (formerly Netscaler) the best ADC to use and if not why?
For ADC, any ADC can do a good job. But in case if you want to add WAF functionality to the same ADC hardware you have to look for other ADC's like F5, Imperva, Radware, Fortinet, etc.
What is your experience regarding pricing and costs for F5 Silverline Managed Services?
The solution is quite reasonably priced, with costs being lower in comparison to competitors. On a scale where ten is very expensive, I would rate the pricing as three. It offers cost savings and i...
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

F5 Silverline Web Application Firewall, F5 Silverline DDoS Protection
Signal Sciences Next-Gen WAF, Signal Sciences RASP
 

Overview

 

Sample Customers

City Bank, Ricacorp Properties, Miele, American Systems, Bangladesh Post Office
Chef, Adobe, Datadog, Etsy, GrubHub, Vimeo, SendGrid, Under Armour, Duo, AppNexus
Find out what your peers are saying about F5 Silverline Managed Services vs. The Fastly Next-Gen WAF (powered by Signal Sciences) and other solutions. Updated: June 2025.
860,592 professionals have used our research since 2012.