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F5 Silverline Managed Services vs Neustar UltraDDoS [EOL] comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Nov 2, 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
Average Rating
8.2
Reviews Sentiment
6.6
Number of Reviews
20
Ranking in other categories
Web Application Firewall (WAF) (17th), Distributed Denial-of-Service (DDoS) Protection (5th)
Neustar UltraDDoS [EOL]
Average Rating
8.0
Reviews Sentiment
6.6
Number of Reviews
1
Ranking in other categories
No ranking in other categories
 

Featured Reviews

Mohan Janarthanan - PeerSpot reviewer
Associate Vice President at Novac Technology Solutions
Cloud applications have gained stronger protection and real-time defense against web attacks
What really stands out for me in terms of advantages of F5 Silverline Managed Services is that in a single cloud platform, I can protect my web applications against attacks. I can also use my load balancer in F5 because they are providing and acting as a load balancer too, and they will support the volumetric and DDoS attacks and malicious attacks. Regarding the real-time threat intelligence feature, I do use this aspect in F5 Silverline Managed Services. It blocks malicious IPs or bad IPs for my server, protecting against my applications. For example, if someone is a bad actor trying to access via a malicious IP, I can block it because the threat intelligence has the capability to block the malicious IP. The adaptable and flexible security impacts threat response time positively. It is effective because it blocks my malicious traffic. Whenever I face issues related to that application, it automatically routes my traffic to act as a proxy and routes my traffic to their scrubbing center, especially in case of any volumetric attack.
JT
Manager Strategic Planning at Endurance International Group
Identifies a request that comes up multiple times, block holds that particular IP, and lets the genuine traffic pass through
Genuine traffic coming in is still getting better. While I understand that it's some sort of algorithm that is written in this scale, that algorithm can be a little bit better because sometimes while we are doing DDoS mitigation, genuine traffic does get blocked. While it is one of the greatest features it can still be improved. I would like to see a dashboard that shows you the data that is transferred from which end. It's where people start looking at abuse management. People keep questioning when the mitigation is on what service it is and how many GBs are passing through. An end user dashboard that will help you identify all of these questions and that can be visible in your entire organization is something that would make sense.

Quotes from Members

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

Pros

"The product’s UI is easy to understand."
"I think F5 is one of the best web application firewalls in the world."
"F5 Silverline Managed Services is recognized as one of the best solutions in Gartner for WAF; I believe it can effectively manage vast amounts of traffic better than other brands like Citrix or FortiGate's WAF solution."
"The most valuable feature of F5 Silverline Managed Services is it becomes similar to a distributed architecture."
"It's a good front end for public infrastructure"
"Overall, this is a good security solution, but there is no such thing as a perfect appliance in IT."
"The most valuable features are the configuration and configuring the process."
"The most important feature is that they have seven firewall protection, to protect our web servers."
"Scalability is awesome, and they have grown two folds or three folds since we started using them, with no concerns even as we protect close to 60,000 hosted sites for business and e-commerce customers."
"In the DDoS it's difficult to validate what is a genuine request from an end user. We've started being able to do that with the logistics that they have set up. With the protection that they have provided, they are able to identify what is valid and what is not valid. We see that a person who is getting DDoS Neustar service is able to block that particular user. However, while they are doing that it doesn't affect other customers on the server."
 

Cons

"The price of F5 Silverline Managed Services could be better, they are not very flexible."
"F5 Silverline Managed Services can improve by reducing the price."
"One negative aspect is that the product is expensive."
"I just hope the price can be cheaper."
"We need to have support for cloud protection, which is not offered by this solution."
"The price is high in comparison to other products."
"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."
"The disadvantages of F5 Silverline Managed Services in comparison to Radware include complexities in WAF technology and iRules, which are highly useful."
"I would like to see a dashboard that shows you the data that is transferred from which end. It's where people start looking at abuse management. People keep questioning when the mitigation is on what service it is and how many GBs are passing through. An end user dashboard that will help you identify all of these questions and that can be visible in your entire organization is something that would make sense."
"Genuine traffic coming in is still getting better because sometimes while we are doing DDoS mitigation, genuine traffic does get blocked."
 

Pricing and Cost Advice

"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 product’s pricing is reasonable."
"The price of F5 Silverline Managed Services could be reduced."
"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."
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Top Industries

By visitors reading reviews
Comms Service Provider
14%
Financial Services Firm
13%
Outsourcing Company
8%
Construction Company
8%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise2
Large Enterprise12
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?
My company has a business relationship with F5 Silverline Managed Services, as they charge based on services provided. The operational team handles project configuration. We mostly purchase F5 Silv...
What needs improvement with F5 Silverline Managed Services?
The disadvantages of F5 Silverline Managed Services in comparison to Radware include complexities in WAF technology and iRules, which are highly useful. Radware provides straightforward blocking WA...
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Also Known As

F5 Silverline Web Application Firewall, F5 Silverline DDoS Protection
Neustar UltraDDoS, UltraDDoS
 

Overview

 

Sample Customers

City Bank, Ricacorp Properties, Miele, American Systems, Bangladesh Post Office
Choxi
Find out what your peers are saying about Radware, Cloudflare, NETSCOUT and others in Distributed Denial-of-Service (DDoS) Protection. Updated: September 2026.
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