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Imperva Web Application Firewall vs R&S Web Application Firewall (DenyAll) comparison

Imperva and Rohde & Schwarz are both solutions in the Web Application Firewall (WAF) category. Imperva is ranked #7 with an average rating of 8.8, while Rohde & Schwarz is ranked #40. Imperva holds a 5.8% mindshare in WAF, compared to Rohde & Schwarz’s 0.2% mindshare. Additionally, 97% of Imperva users are willing to recommend the solution, compared to 100% of Rohde & Schwarz users who would recommend it.
Imperva Web Application Fir...
Read 52 Imperva Web Application Firewall reviews
  • 4,789 Views
  • 2,294 Comparison Views
97% willing to recommend
R&S Web Application Firewal...
Read 1 R&S Web Application Firewall (DenyAll) review
  • 260 Views
  • 132 Comparison Views
100% willing to recommend
 

Comparison Buyer's Guide

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Executive Summary
We performed a comparison between Imperva Web Application Firewall and R&S Web Application Firewall (DenyAll) based on real PeerSpot user reviews.

Find out what your peers are saying about Amazon Web Services (AWS), F5, Microsoft and others in Web Application Firewall (WAF).

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To learn more, read our detailed Web Application Firewall (WAF) Report (Updated: June 2025).
Buyer's Guide
Web Application Firewall (WAF)
June 2025
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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

Imperva Web Application Fir...
Ranking in Web Application Firewall (WAF)
7th
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
52
Ranking in other categories
No ranking in other categories
R&S Web Application Firewal...
Ranking in Web Application Firewall (WAF)
40th
Average Rating
9.0
Reviews Sentiment
8.5
Number of Reviews
1
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of June 2025, in the Web Application Firewall (WAF) category, the mindshare of Imperva Web Application Firewall is 5.8%, down from 6.7% compared to the previous year. The mindshare of R&S Web Application Firewall (DenyAll) is 0.2%, down from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF)
 

Q&A Highlights

PM
Aug 31, 2021
Which Web Application Firewall (WAF) would you recommend? R&S or Imperva?
Imperva is a strong choice, given their security focus and ongoing R&D into the product in areas such as bot management.
See all answers
 

Featured Reviews

Mitesh D Patel - PeerSpot reviewer
Effectively defends against threats like cross-site scripting (XSS), SQL injection, and others
It does bring value. For example, consider a BFSI customer. Their application is critical and represents their brand. Without a WAF, an attack could take their application down, harming their reputation. It leads to hampering the customer's workflow. With an Imperva WAF, they protect against attacks like DDoS or SQL injection, ensuring their application remains available and customers are happy. That's the main benefit for both the customer and the organization. The impact depends on the customer's use case. If their business primarily operates online, a CDN is beneficial for traffic optimization. Moreover, the integration options depend on the specific use case of our customers. Generally, integration capabilities are good with SIEM (Security Information and Event Management) parts.
Read full review
SS
Geo-localization and IP reputation help to keep our clients secure and more available
The area that should be improved is licensing. When using an active/passive cluster, we have to pay 70% of the master appliance and license for the passive server that does not work. Since we know that only one server works at a time, we should pay only one license for the appliances and for the support as well. In my opinion, this has to be improved. If possible, the client software should be a web application instead of downloading software for the management. This can avoid login problems when they update or patch.
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

"Configuration for different application sources is most valuable. We can segregate the traffic that an application is carrying and identify the sizing in Imperva."
"The solution has been quite stable. I have not seen any bugs at all."
"Imperva is a Gartner leader, so its scalability, performance, and features are excellent."
"One good thing about Imperva Web Application Firewall is it can be on the cloud and also it can be on-premise."
"The features I have found most valuable with Imperva Web Application Firewall are account takeover protection, advanced bot protection, and API security."
"There are many features. There is ease of deployment. You can deploy the Imperva Web Application Firewall in two to three minutes. After that, you have to set the policies. For setting policies, you have toggle buttons. You can turn something on or off."
"The solution is very scalable. It is one of the most important features. You can also expand resources and features as well."
"Very intuitive and granular configuration - It does not require much time, or advanced knowledge, for configuration and maintenance."
More Imperva Web Application Firewall pros
"The three most valuable features that I noticed are the geo-localization of the user, the IP reputation, and the compartmental analysis."
 

Cons

"Support is one thing I wish Imperva could improve."
"I don't really use it and therefore can't speak to areas of improvement."
"It should be more user-friendly. Like other web solutions, it would be helpful to be able to easily do policy configuration and identification inside the application. Understanding the in-depth configuration of a policy is somewhat difficult for an engineer, and they can improve that."
"There could be some limitations that from the converged infrastructure perspective: when you want to converge with everything and you want Imperva to get there easily because it's not a cloud component. For example, when you want to build servers and you're using OneView to manage your software-defined networks, implementing Imperva right away is not that simple. But if you're doing just a simple cloud infrastructure with servers in there, you're good to go. Also, we are not able, with Imperva, to block by signatures. Imperva by itself needs to be complemented with another service to do URL filtering."
"The tool needs to improve CPU and storage memory."
"I loved the approach of the cloud. The cloud has a lot of new features, like advanced web protection and DDoS protection. If those could also be on-boarded onto the on-prem versions, that would be ideal. They need to pay attention to both deployment options and not just favor one."
"The support for the on-premises version needs improvement."
"It is complicated to integrate the solution's on-cloud version with other platforms."
More Imperva Web Application Firewall cons
"The area that should be improved is licensing."
 

Pricing and Cost Advice

"Imperva’s pricing is a bit higher in the market since it offers a full-blown WAF."
"The price is high compared to other solutions like FortiWeb."
"Licensing can range from one to twenty thousand dollars annually. Additionally, some features, including software support, require an annual subscription as well."
"The tool is expensive."
"Imperva Web Application Firewall is expensive."
"Imperva Web Application Firewall's pricing is expensive."
"It is very costly, but the return on investment is very high. Its cost was around $70,000, and we got it back in just six months."
"It's an excellent product, but it can be very costly."
More Imperva Web Application Firewall pricing and cost advice
Information not available
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Answers from the Community

PM
Aug 31, 2021
Aug 31, 2021
Which Web Application Firewall (WAF) would you recommend? R&S or Imperva?
Imperva is a strong choice, given their security focus and ongoing R&D into the product in areas such as bot management.
2 out of 5 answers
RF
May 19, 2020
We have had a very good experience with FortiWeb.
Read full answer
JD
May 20, 2020
Imperva is a strong choice, given their security focus and ongoing R&D into the product in areas such as bot management.
Read full answer
See all 5 answers
 

Top Industries

By visitors reading reviews
Financial Services Firm
16%
Computer Software Company
12%
Insurance Company
8%
Manufacturing Company
6%
No data available
 

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?
My recommendation is Imperva.
See all answers
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.
See all answers
DDoS solutions: Any other solutions to consider aside from Radware DDoS Protection Service and F5 Silverline DDoS Protection?
You can have a look to Imperva Cloud WAF, the anti-DDoS mitigation is under 1s and works very well. I observed a lot of DDoS attacks that were well managed (even not seen by the customer) by Imperv...
See all answers
Which Web Application Firewall (WAF) would you recommend? R&S or Imperva?
Imperva is a strong choice, given their security focus and ongoing R&D into the product in areas such as bot management.
See all answers
 

Comparisons

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Compared 12% of the time
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Compared 10% of the time
AWS WAF vs Imperva Web Application Firewall Logo
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Compared 8% of the time
Fortinet FortiWeb vs Imperva Web Application Firewall Logo
Fortinet FortiWeb vs Imperva Web Application Firewall
Compared 7% of the time
More Imperva Web Application Firewall Competitors
No data available
 

Product Reports

Buyer's Guide
Imperva Web Application Firewall
June 2025
Imperva Web Application Firewall reportDownload Imperva Web Application Firewall product report
Buyer's Guide
Web Application Firewall (WAF)
June 2025
R&S Web Application Firewall (DenyAll) reportDownload R&S Web Application Firewall (DenyAll) product report
 

Also Known As

No data available
Rohde & Schwarz Web Application Firewall, R&S WAF, DenyAll Web Application Security
 

Overview

Imperva Web Application Firewall is a versatile solution that protects web applications and databases from various attacks, including DDoS, cross-site scripting, and SQL injection attacks. It offers data security, availability, and access control and can be deployed on-premises or on the cloud. 

The solution has good security against web attacks and offers advanced bot protection, API security, and mitigation features. Imperva WAF is easy to configure and deploy; it has good customer service and an excellent user interface.

Imperva

Beyond the basic capabilities of traditional negative and positive security models, DenyAll’s scoring mechanism, user behavior tracking and advanced detection engines deliver best-of-breed security that won’t let you down. None of our customers have made the headlines with security breaches.

Web Services and automated machine-to-machine communications support business processes, internal and with ecosystem partners that are often critical. DenyAll makes it easy to optimize and secure these XML-based data flows, with capabilities found in no other WAF or SOA Gateway.

Rohde & Schwarz
 

Sample Customers

BlueCross BlueShield, eHarmony, EMF Broadcasting, GE Healthcare, Metro Bank, The Motley Fool, Siemens
Information Not Available
Buyer's Guide
Web Application Firewall (WAF)
June 2025
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