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

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 21, 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

Imperva Application Securit...
Ranking in Web Application Firewall (WAF)
4th
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
133
Ranking in other categories
CDN (4th), Distributed Denial-of-Service (DDoS) Protection (4th), Bot Management (1st), API Security (2nd)
R&S Web Application Firewal...
Ranking in Web Application Firewall (WAF)
43rd
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 January 2026, in the Web Application Firewall (WAF) category, the mindshare of Imperva Application Security Platform is 7.6%, up from 7.1% compared to the previous year. The mindshare of R&S Web Application Firewall (DenyAll) is 0.3%, up from 0.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF) Market Share Distribution
ProductMarket Share (%)
Imperva Application Security Platform7.6%
R&S Web Application Firewall (DenyAll)0.3%
Other92.1%
Web Application Firewall (WAF)
 

Q&A Highlights

PM
Sales Director with 51-200 employees
Aug 31, 2021
 

Featured Reviews

reviewer1247523 - PeerSpot reviewer
Head of Sales Services Department at a comms service provider with 51-200 employees
Solution ensures website availability and proactive threat mitigation
Over the seven years, the most valuable features of Imperva DDoS that I have found are related to DDoS attacks, which are a group of attacks, and not all of them can be resolved on the endpoint level before the website. Using the web firewall before the website is a common use case to protect against malicious requests to the website. I have utilized Imperva's Intelligent Traffic Filtering feature. This feature helps me understand how the attack is progressing and what is happening inside the requests to our website. It allows me to granularly grant or deny access to certain parts of our website. This helps when we know our customers and the types of requests that can be sent from them, enabling us to block some malicious requests. Imperva DDoS has User Behavior Analytics and Threat Intelligence on its board, and this helps us to be protected proactively. Imperva DDoS connects to its database of threats, storing whole information about attacks all over the world in one simple engine. Everyone can use this feature, which can connect to this engine and get information about what is going on at the world level. That is the way to be protected at the company's level. The integration capabilities of Imperva DDoS are very easy and simple. We can run it in 2 hours.
SS
General Manager at 3R Technologie
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.

Quotes from Members

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

Pros

"An improvement has been to our website: It increases the speed of our response, the capacity of the site, and optimizes the bandwidth.​"
"It fits our requirements, as well as our budget."
"Incapsula takes care of the CDN infrastructure and bandwidth volume, providing several enterprise "load balancing" features."
"The solution's most valuable aspect is that it is easy to configure."
"The valuable features of Imperva WAF include its effective security breach prevention through automatically updating rules."
"The solution is very scalable. It is one of the most important features. You can also expand resources and features as well."
"Integration with IBM AS/400 and Db2 is okay."
"Imperva WAF's strongest features are the detection of web application threats and vulnerabilities in the source code."
"The three most valuable features that I noticed are the geo-localization of the user, the IP reputation, and the compartmental analysis."
 

Cons

"The product's customization capabilities are a bit problematic, requiring support cases for backend modifications."
"One potential improvement for Imperva is enhancing its alert system."
"Imperva Web Application Firewall could improve the console by making it easier to use."
"It would be helpful to have a "recommended deployment", or even a list of basic features that should either be used or turned on by default."
"The log analytics interface within Incapsula isn't really good. For example, if you have to get all logs from there, it's a very cumbersome process."
"The user interface could be better."
"The salespeople tend to exaggerate its capabilities, which can cost you money if you don't verify the information."
"I am not sure if this application has a policy where you can create your custom policy and run it as our firewall. We should have some ability to also create some custom policy, then run it as a firewall."
"The area that should be improved is licensing."
 

Pricing and Cost Advice

"We are satisfied with the pricing."
"The cost of this solution depends on the platform."
"Varies depending on the needs of the customer."
"We have an issue with Imperva Incapsula in the Iraqi market because of the high price."
"Imperva Web Application Firewall's pricing is expensive."
"Make sure you understand the way that Imperva charges. It's very affordable. However, I would like to see a package with the Virtual Patching included. You get to do patching separately."
"The price of Imperva Web Application Firewalls is expensive compared to others."
"The data packages are higher than our needs so we end up paying for data that we don't use."
Information not available
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Comparison Review

it_user68487 - PeerSpot reviewer
Security Expert with 51-200 employees
Nov 6, 2013
CloudFlare vs Incapsula: Web Application Firewall
CloudFlare vs Incapsula: Round 2 Web Application Firewall Comparative Penetration Testing Analysis Report v1.0 Summary This document contains the results of a second comparative penetration test conducted by a team of security specialists at Zero Science Lab against two cloud-based Web…
 

Answers from the Community

PM
Sales Director with 51-200 employees
Aug 31, 2021
Aug 31, 2021
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
Resp. Area de Segurança at REN
May 19, 2020
We have had a very good experience with FortiWeb.
JD
Principal Analyst at a tech services company with 1-10 employees
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.
 

Top Industries

By visitors reading reviews
Financial Services Firm
13%
Computer Software Company
9%
Manufacturing Company
9%
Insurance Company
6%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business83
Midsize Enterprise25
Large Enterprise61
No data available
 

Questions from the Community

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.
What do you like most about Imperva Incapsula?
We use Imperva DDoS to stop DDoS attacks and reduce the amount of unwanted queries against web services or web scraping.
What is your experience regarding pricing and costs for Imperva DDoS?
The pricing, setup costs, and licensing of Imperva DDoS are reasonable for the amount of technical capabilities provided. I would rate the pricing of Imperva DDoS as five, where one is very cheap a...
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Also Known As

Imperva Bot Management, Imperva Web Application Firewall, Imperva API Security
Rohde & Schwarz Web Application Firewall, R&S WAF, DenyAll Web Application Security
 

Overview

 

Sample Customers

Hitachi, BNZ, Bitstamp, Moz, InnoGames, BTCChina, Wix, LivePerson, Zillow and more.
Information Not Available
Find out what your peers are saying about Fortinet, F5, Amazon Web Services (AWS) and others in Web Application Firewall (WAF). Updated: January 2026.
881,114 professionals have used our research since 2012.