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NetScaler 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
8.4
Reviews Sentiment
7.5
Number of Reviews
24
Ranking in other categories
No ranking in other categories
NetScaler
Ranking in Web Application Firewall (WAF)
14th
Average Rating
8.4
Reviews Sentiment
7.0
Number of Reviews
107
Ranking in other categories
Application Delivery Controllers (ADC) (1st), Network Management Applications (6th)
The Fastly Next-Gen WAF (po...
Ranking in Web Application Firewall (WAF)
28th
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 August 2025, in the Web Application Firewall (WAF) category, the mindshare of Cloudflare Web Application Firewall is 7.3%, up from 6.5% compared to the previous year. The mindshare of NetScaler is 3.3%, down from 3.3% 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

SachidDoshi - PeerSpot reviewer
Offers a huge signature repository and is superiorly effective in mitigating DDoS attacks
The solution's learning curve can still be further reduced, which presently stands at two or three months. The product has a custom rule set that users can modify and manifest as needed. The vendor can probably shorten the learning curve using cutting-edge technologies like AI. The solution provider can also work around the web applications and identify the toolset that needs to be implemented to deploy the solution in less time. The vendor has launched a SASE product that can function with Cloudflare Web Application Firewall, but many improvements are needed in terms of features, such as the web filtering feature, and CASB has not yet been added.
DEMİRHAN ÇAVUŞOĞLU - PeerSpot reviewer
A tool for centralized management including inventory and sales tracking
Citrix ADM has the ability to implement policies to tighten security. For instance, you can restrict access to your network from outsiders or lack necessary security measures such as antivirus programs. Additionally, there's the Delivery Controller, which allows for comprehensive monitoring and management tasks such as remote restarts, maintenance, and registration. Another essential component is the Director, which provides detailed insights into sessions, including identifying session failures, connection issues, user lockouts, etc. It presents a list of problems to address, enabling you to click on them and resolve them efficiently.
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's pretty convenient and pretty easy to set up and run. And then kind of for static content, it also offers caching."
"The product has a valuable security control functionality."
"The setup process is very simple for me."
"We like that there's load balancing, firewall capabilities, DDoS protection, et cetera, all covered by Cloudflare."
"I'm highly satisfied. It's remarkably user-friendly, enabling me to quickly identify issues, and deploy solutions, and it offers the necessary features."
"The product has improved our security posture by blocking bad actors."
"Cloudflare WAF provides protection through rules and functionalities like Cloudflare's SDRAP."
"Technical support has a very fast response time and they are helpful."
"I find all of it to be valuable, because of the flexibility that is built into this product."
"NetScaler Gateway: Why? Availability/Security: We delivered more than 200 applications thru Xenapp. This feature give us the possibility to deliver the applications anywhere. Currently, 30% of access is made through our NetScaler Gateway (Internet connections)."
"The load balancing feature and the fact that you can do context switching in the WAF are the most valuable. We majorly use it for load balancing, but we also use it for context switching in the WAF. It is also robust and very easy to work with and manage."
"The most valuable feature of Citrix ADC is its ease of use."
"Its customer support service is good."
"The flexibility in configuration options is impressive."
"My clients use it for load balancing."
"The solution is very stable. We don't have any downtime or issues of that nature."
"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."
"The product's most valuable feature is its ability to set up the rules easily."
 

Cons

"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 product can improve by having more multitenancy capability, which is currently not available."
"The dashboard could be more user-friendly."
"Cloudflare Web Application Firewall should improve visibility for a customer."
"The notification part could be improved. It's very much connected to Web Application Firewall, rate-limiting, and DDoS protection."
"It would be ideal if the solution offered better log integration and more integration with different platforms."
"The learning curve was steep initially."
"In terms of what could be improved, I would say the user interface because sometimes it can be complicated."
"Overall the price of Citrix ADC could be more competitive."
"Citrix ADC is a complex product, and it takes time to understand these things. But the documentation is poor, and the deployment is difficult. Integration could also be better because what I find is that you cannot easily integrate the panel in the second sector. What I have found is that in the last index, there is a limitation when getting validated. Technical support could also be better."
"Mastering it requires significant learning and training due to its complexity."
"Citrix should improve the documentation. It is not really clear how to set up many features to our advantage. When we setup Citrix NetScaler ADC, we have to figure it out by ourselves without a lot of documentation."
"The solution can improve their support and send tickets directly to a Citrix ADC engineer in order to avoid having to escalate each support call."
"Its GUI should be improved. Its CLI is powerful, but GUI needs more features."
"In every release - and it doesn't matter if it's a minor release or a major release - they keep moving things around and they keep changing the mechanism. So certain things can work in one version one way, and everything works really well, then when you upgrade it to the next version, it breaks everything because they have a new way of doing it."
"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."
"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."
"Fastly don't support caching for China users. That's the only feature lacking compared to Akamai."
"The UI is not very intuitive and could be better."
 

Pricing and Cost Advice

"It is not too pricey."
"Cloudflare offers different types of subscriptions for businesses, enterprises, and personal users, and the pricing is negotiable."
"We pay $210 per month for CloudFlare WAF."
"The pricing model is very straightforward compared to the competition. You just pay per month for the product and usage."
"The solution is expensive."
"Cloudflare Web Application Firewall is more affordable than other solutions."
"The annual licensing fee is $10,000 USD."
"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."
"I give the price of the solution a seven out of ten."
"The tool is cheap."
"Price-wise, I feel that the solution is a little bit expensive."
"Citrix ADM costs us approximately $5000 per month."
"Licensing is adequate. I wanted to have a more prominent license, but until I do they don't give enough support. The additional cost would be too much."
"There isn't much of a difference between the cost of Citrix and that of other similar solutions."
"Regarding pricing, while it's expensive, I can't comment on the exact ROI without a budget analysis. However, in terms of service quality, it's worth the price."
"For partners, NetScaler is not as expensive price-wise versus F5."
"Signal Sciences is pretty cheap compared to other solutions."
"The product has an affordable cost."
"The pricing is 50% less than Akamai."
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Top Industries

By visitors reading reviews
Computer Software Company
16%
Financial Services Firm
9%
Comms Service Provider
8%
Manufacturing Company
7%
Computer Software Company
15%
Financial Services Firm
10%
Government
10%
Manufacturing Company
7%
Computer Software Company
11%
Manufacturing Company
11%
Healthcare Company
10%
Retailer
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What do you like most about Cloudflare Web Application Firewall?
The product has a valuable security control functionality.
What needs improvement with Cloudflare Web Application Firewall?
I cannot say much about areas of improvement for Cloudflare Web Application Firewall because I haven't gone through d...
What do you like most about Citrix ADC?
The most valuable feature for us is the application firewalling in Citrix NetScaler, ensuring only valid traffic ente...
What is your experience regarding pricing and costs for Citrix ADC?
After deployment, Citrix Netscaler shifted to a subscription-based license scheme for support, which is slightly more...
What needs improvement with Citrix ADC?
Citrix NetScaler is a robust product, but mastering it requires significant learning and training due to its complexi...
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 WAF
Citrix ADC, Citrix NetScaler VPX, NetScaler Console, NetScaler Web Application Firewall
Signal Sciences Next-Gen WAF, Signal Sciences RASP
 

Overview

 

Sample Customers

crunchbase, udacity, marketo, okcupid, zendesk
ABB Schweiz, Aer Lingus, AIDS Healthcare Foundation, Amnet Technology Solutions, Aramex International, Ascenty, Atos, Autodesk
Chef, Adobe, Datadog, Etsy, GrubHub, Vimeo, SendGrid, Under Armour, Duo, AppNexus
Find out what your peers are saying about NetScaler vs. The Fastly Next-Gen WAF (powered by Signal Sciences) and other solutions. Updated: July 2025.
864,574 professionals have used our research since 2012.