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

Why PeerSpot?

NetScaler and Fastly are both solutions in the Web Application Firewall (WAF) category. NetScaler is ranked #20 with an average rating of 8.0, while Fastly is ranked #34 with an average rating of 7.0. NetScaler holds a 3.0% mindshare in WAF, compared to Fastly’s 1.2% mindshare. Additionally, 91% of NetScaler users are willing to recommend the solution, compared to 60% of Fastly users who would recommend it.

NetScaler

Read 107 NetScaler reviews

13,769 Views
6,196 Comparison Views

91% willing to recommend

The Fastly Next-Gen WAF (po...

Read 4 The Fastly Next-Gen WAF (powered by Signal Sciences) reviews

1,790 Views
1,736 Comparison Views

60% willing to recommend

NetScaler

The Fastly Next-Gen WAF (po...

Comparison Buyer's Guide

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Executive SummaryUpdated on Mar 1, 2026

NetScaler and Fastly Next-Gen WAF are competing in the web application firewall market, offering unique security solutions. Fastly Next-Gen WAF often holds an advantage due to its robust features that many users feel justify its cost.

Features: NetScaler offers comprehensive traffic management, application acceleration, and an integrated application firewall. Fastly Next-Gen WAF provides real-time visibility, robust threat detection, and seamless cloud environment integration. The cloud-native approach of Fastly Next-Gen WAF offers enhanced flexibility and adaptability.

Room for Improvement: For NetScaler, improvement areas include simplifying deployment, enhancing cloud-native capabilities, and reducing hardware dependency. Fastly Next-Gen WAF can improve by making its UI more intuitive, increasing anomaly detection customization, and offering more comprehensive documentation for beginners.

Ease of Deployment and Customer Service: Fastly Next-Gen WAF is beneficial with rapid deployment in cloud infrastructures and responsive customer support, simplifying implementation and management. In contrast, NetScaler's complexity often requires onsite hardware installation and support.

Pricing and ROI: NetScaler generally offers a more cost-effective initial setup, appealing to budget-conscious organizations. The Fastly Next-Gen WAF may involve higher upfront costs, but its advanced features typically provide a greater return on investment through increased security and reduced downtime.

To learn more, read our detailed NetScaler vs. The Fastly Next-Gen WAF (powered by Signal Sciences) Report (Updated: September 2026).

Buyer's Guide

NetScaler vs. The Fastly Next-Gen WAF (powered by Signal Sciences)

September 2026

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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

NetScaler

Ranking in Web Application Firewall (WAF)

20th

Average Rating

8.4

Reviews Sentiment

7.0

Number of Reviews

107

Ranking in other categories

Application Delivery Controllers (ADC) (3rd), Network Management Applications (13th)

The Fastly Next-Gen WAF (po...

Ranking in Web Application Firewall (WAF)

34th

Average Rating

7.6

Reviews Sentiment

4.8

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of September 2026, in the Web Application Firewall (WAF) category, the mindshare of NetScaler is 3.0%, down from 3.8% compared to the previous year. The mindshare of The Fastly Next-Gen WAF (powered by Signal Sciences) is 1.2%, up from 1.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Web Application Firewall (WAF) Mindshare Distribution
Product	Mindshare (%)
NetScaler	3.0%
The Fastly Next-Gen WAF (powered by Signal Sciences)	1.2%
Other	95.8%

Web Application Firewall (WAF)

Featured Reviews

Millaard Peter

Senior Data Center Engineer at Axians

Load balancing and secure access have supported complex migrations and automation at scale

NetScaler has positively impacted my organization because I work for a system integrator and deploy it for customers. Many customers are really happy with NetScaler, except for the pricing, as Citrix has changed a lot of their pricing in the last two or three years when they transitioned to Cloud Software Group. However, despite that, I know customers are really satisfied with the technical capabilities that NetScaler provides. While I do not have specific outcomes or metrics from my customers, I think using Core Logic has made it much easier for the big municipality I mentioned to implement NetScaler as a total solution, thus speeding up their automation. There are likely many benefits, but I lack benchmarks or timing figures to quantify that.

Read full review

reviewer2161107

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.

Read full review

Quotes from Members

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

Pros

"It's very easy to configure."

"The most valuable feature, absolutely, is its high-security."

"Citrix Netscaler makes it easy to provide services to end users, offering better visibility into user sessions compared to VMware. However, instability in network or machine can cause headaches as it's hard to pinpoint issues. SSL offload feature enhances security posture by providing secure connectivity between end users and backend systems. We use additional Azure remote security solutions for comprehensive protection."

"The solution was very easy to deploy."

"The analytics are a great feature."

"From a security standpoint, It is a comprehensive solution in a single box."

"This solution can be deployed on-premises, public cloud, and private cloud; it's hybrid, it's a good product and I recommend it."

"The web application firewall which protects our services on the internet, and then of course services like our ability to provide high availability for the services we are offering are the most valuable features."

More NetScaler pros

"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

"The setup for Citrix NetScaler has room for improvement. It could be easier."

"Does not include security. A web application firewall would be a nice addition."

"Citrix should offer a demo or free-trial version of NetScaler. Several other vendors do, but Citrix does not. Pricing should also be more readily available."

"Sometimes when I enable NetScaler, it makes the box crash randomly."

"I think the documentation should be improved - there should be more documentation."

"Security could be improved because then I can get rid of my Cisco firewalls. If they improve the security then I could run my security, my proxy, my firewalling and my SDN solution on one device instead of having to have multiple devices."

"The solution's pricing is a big concern and should be improved."

"Citrix ADC can be really complex. It isn't very simple like some other appliances that I've worked with. You need a lot of skill and experience to manage it. I'm not talking about a year or two. You need at least four years to understand it very well. It is not that easy to learn. They should make it a lot simpler for users to understand the management of it. They can also provide some additional training. The material they have on the site is not sufficient enough for you to understand how to manage it. Their training is expensive, and not everyone has the funds and experience for it. Citrix isn't very popular around these parts of the world. So, it can use some more marketing, sales, enlightenment, and advertisement. These could bring more market for them. Basically, there are just a few companies that really go for Citrix. Most of the companies go for VMware because they marketed themselves more than Citrix. There isn't much difference between Citrix and VMware. VMware is a little more robust than Citrix. Citrix has focused more on desktops rather than server virtualization, and that's the advantage VMware has over Citrix. Citrix also needs to educate and inform users about the infrastructure that is supported with a version. Currently, if the customers don't look at the datasheet, they might miss this important information."

More NetScaler cons

"Fastly don't support caching for China users. That's the only feature lacking compared to Akamai."

"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."

"The UI is not very intuitive and could be better."

"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."

Pricing and Cost Advice

"The license for Citrix NetScaler is on an annual basis and it is reasonably priced."

"Costly product and complicated licensing."

"This product is more expensive than some of the competitors."

"You can do CapEx and then a yearly monthly fee, or you can do a subscription model, whether that's one month, month-to-month, or three-year subscription model."

"For partners, NetScaler is not as expensive price-wise versus F5."

"We have all the features and functions of Citrix because we have a premium license."

"Its price is comparable to others and affordable."

"It is an enterprise solution. Thus, its costs are reasonable."

More NetScaler pricing and cost advice

"Signal Sciences is pretty cheap compared to other solutions."

"The pricing is 50% less than Akamai."

"The product has an affordable cost."

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Top Industries

By visitors reading reviews

Financial Services Firm

11%

Manufacturing Company

Outsourcing Company

Construction Company

Manufacturing Company

Comms Service Provider

Retailer

Financial Services Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	44
Midsize Enterprise	24
Large Enterprise	59

No data available

Questions from the Community

What advice do you have for others considering Citrix NetScaler?

My advice to others looking into using NetScaler is simply to go use it. I give this product an overall rating of 8.

See all answers

What is your experience regarding pricing and costs for Citrix ADM?

My experience with pricing, setup cost, and licensing has revealed that the licensing recently changed to a plus model, which is manageable if you know what you are doing. However, the transition f...

See all answers

What needs improvement with Citrix Web App and API Protection?

I think NetScaler can improve in pricing, and with the recent release of version 15.1, the successor to 14.1, there are claims of improved performance due to the kernel change. I believe that integ...

See all answers

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-making process.

See all answers

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 is hard to navigate unless you are very familiar with it.

See all answers

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 malicious traffic. They both perform different jobs and serve different purposes, ...

See all answers

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Product Reports

Buyer's Guide

NetScaler

September 2026

Download NetScaler product report

Buyer's Guide

The Fastly Next-Gen WAF (powered by Signal Sciences)

August 2026

The Fastly Next-Gen WAF (powered by Signal Sciences) report

Download The Fastly Next-Gen WAF (powered by Signal Sciences) product report

Also Known As

Citrix ADC, Citrix NetScaler VPX, NetScaler Console, NetScaler Web Application Firewall, NetScaler VPX - Customer Licensed

Signal Sciences Next-Gen WAF, Signal Sciences RASP

Overview

NetScaler is an advanced application delivery controller providing load balancing, SSL offloading, and enhanced network performance. Users benefit from its robust security features, seamless Citrix integrations, and cost-effective infrastructure.

Designed to optimize and secure application delivery, NetScaler offers high availability and supports data centers with its load balancing and reverse proxy capabilities. It ensures effective traffic management and provides valuable insights into network health while integrating easily with Citrix products. Users appreciate its centralized management via ADM and flexible deployment options tailored to their infrastructure needs. However, there is room for improvement in its management tools, interface, and documentation, alongside a need for security enhancements and better licensing flexibility.

What are the most important features of NetScaler?

Flexible Deployment: Allows adaptation to different environments and needs.
Load Balancing: Efficiently distributes traffic to enhance performance.
SSL Offloading: Offloads encryption to optimize server performance.
Content Switching: Enables tailored content delivery based on user needs.
Robust Security: Includes firewalling and AAA authentication.
Global Server Load Balancing: Distributes load across multiple locations for high availability.

What benefits should users look for in reviews?

Cost-effectiveness: Delivers an efficient infrastructure without high costs.
Reliable Performance: Ensures consistent delivery and resilience.
High Availability: Maintains network uptime and service quality.
Technical Support: Offers responsive assistance for operational issues.

NetScaler is implemented across sectors like healthcare, finance, and education to guarantee secure remote access, enhance application network management, and support virtual desktops. Its application gateways and VPN access capabilities make it ideal for industries needing secure and efficient connectivity solutions.

NetScaler

The Fastly Next-Gen WAF powered by Signal Sciences offers advanced protection against sophisticated cyber threats, ensuring robust and scalable security for web applications. It integrates seamlessly into existing environments, blocking malicious traffic efficiently.

Designed for optimal web application protection, The Fastly Next-Gen WAF distinguishes itself through its ability to dynamically learn traffic patterns, providing comprehensive security without compromising speed. It is engineered to defend against OWASP Top 10 threats while offering real-time insights and analytics. With a focus on adaptability, it caters to modern DevOps environments, ensuring that security stays aligned with rapid deployment cycles and agile workflows. Its scalable architecture, coupled with its detailed reporting features, makes it an attractive choice for enterprises aiming for proactive threat management.

What are the key features of The Fastly Next-Gen WAF powered by Signal Sciences?

Dynamic Traffic Analysis: Continuously learns and adapts to traffic patterns.
Scalable Protection: Meets the demands of growing business needs.
Real-Time Insights: Offers detailed analytics for proactive threat management.
Advanced Threat Detection: Shields against the latest OWASP Top 10 threats.
Seamless Integration: Fits into existing DevOps pipelines and architectures with ease.

What benefits should users seek in reviews when evaluating The Fastly Next-Gen WAF powered by Signal Sciences?

Improved Security Posture: Enhanced ability to defend against active threats.
Operational Efficiency: Streamlined workflow integration without performance hits.
Cost Efficiency: Offers strong ROI through reduced breach risk and operational downtime.
Scalability: Grows with business needs, maintaining security effectiveness.
Enhanced Decision-Making: Data-driven insights lead to better security strategies.

In industries like e-commerce, finance, and healthcare, The Fastly Next-Gen WAF is implemented to ensure compliance and data protection. Retail sectors benefit from its ability to handle peak traffic while maintaining security, and financial services appreciate its detailed monitoring capabilities for sensitive transaction protection. Healthcare organizations leverage its scalability to safeguard patient data during increased digital transformation efforts.

Fastly

Sample Customers

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

Buyer's Guide

NetScaler vs. The Fastly Next-Gen WAF (powered by Signal Sciences)

September 2026

Free Report: NetScaler vs. The Fastly Next-Gen WAF (powered by Signal Sciences)

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