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

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Comparison Buyer's Guide

Executive SummaryUpdated on Mar 22, 2026

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
8.6
Reviews Sentiment
7.4
Number of Reviews
26
Ranking in other categories
No ranking in other categories
Imperva Application Securit...
Ranking in Web Application Firewall (WAF)
1st
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
144
Ranking in other categories
CDN (2nd), Distributed Denial-of-Service (DDoS) Protection (4th), Bot Management (1st), API Security (2nd)
R&S Web Application Firewal...
Ranking in Web Application Firewall (WAF)
46th
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 May 2026, in the Web Application Firewall (WAF) category, the mindshare of Cloudflare Web Application Firewall is 4.7%, down from 7.1% compared to the previous year. The mindshare of Imperva Application Security Platform is 7.7%, up from 7.1% compared to the previous year. The mindshare of R&S Web Application Firewall (DenyAll) is 0.5%, up from 0.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Web Application Firewall (WAF) Mindshare Distribution
ProductMindshare (%)
Imperva Application Security Platform7.7%
Cloudflare Web Application Firewall4.7%
R&S Web Application Firewall (DenyAll)0.5%
Other87.1%
Web Application Firewall (WAF)
 

Q&A Highlights

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

Featured Reviews

DB
CTO at PlayNirvana
Advanced security reporting has protected high-traffic betting platforms from constant attacks
I don't see room for improvement to Cloudflare Web Application Firewall. One thing I don't know much about because we have a dedicated IT team for that, and I'm not involved with Cloudflare much anymore. But if I were to compare them to F5, I would like to see more features that F5 offers. F5 has an option to bring the whole infrastructure, the whole WAF and all their packages, Bot Management, and everything else on your infrastructure. You need to install certain services from their side, and then you can choose if you would like requests to hit your servers immediately or if requests need to be proxied through F5 backbone. That would be a nice addition because we have 90% of the traffic as legit traffic coming from whitelisted servers. If it comes from whitelisted servers, I don't need to go every request through the backbone; I could easily just IP whitelist everything. Then I could maybe have Bot Management on my infrastructure that drastically reduces the price of Cloudflare. I would like to see Push CDN more improved in the next release of Cloudflare Web Application Firewall. And maybe something similar to Pushpin that Fastly has, which is an option where you can push messages that then can be scaled globally over the network. From our perspective, if we have a listener that listens for stock updates, I would just need to have one processor that pushes those updates to the Cloudflare API, and then Cloudflare would broadcast that message to all listeners. Cloudflare will check the order of the message, and if you, as a customer, are not connected or have some kind of network issue, when you reconnect, you will receive the latest state and missing updates.
ST
Senior Cybersecurity Consultant at Cyberoutcome Limited
Strong policies and bot defenses have secured critical APIs and have reduced attack noise
From my research regarding the IAM space that Imperva Application Security Platform is trying to look into, I believe they still need to do a lot of modeling and modification to make sure that also helps. There are several competitors in the IAM space, so Imperva would do well if they can do some basic modeling and modifications from my own personal research and my own experience in the IAM space. Alternatively, they could actually just focus on trying to be stronger in the web application space and the database activity monitoring space.The main reason it is not a perfect ten is regarding support. At times, having to reach the support team takes eight hours to ten hours maximum. There are times when clients could have urgent issues to attend to. The support team could do more by having a faster response rate.
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

"I'm highly satisfied. It's remarkably user-friendly, enabling me to quickly identify issues, and deploy solutions, and it offers the necessary features."
"This is a good product; it's reliable and scales well."
"For us, the key feature of Cloudflare is DDoS protection and IP hiding, especially since we are a crypto company."
"Some of the most valuable features of Cloudflare Web Application Firewall include its DNS zone setup and the zero trust policy."
"Cloudflare is cheaper compared to Azure WAF, which I have considered before."
"Very glad the WAF rulesets works out of box, and requires very little tuning or maintenance."
"Someone with a basic understanding of networking and security will be able to implement the firewall's basic features within 15 minutes."
"Caching is the most valuable feature of Cloudflare Web Application Firewall."
"The bot management features are very effective, as they help filter unwanted traffic using keywords."
"My advice to anyone considering Imperva Web Application Firewall is that they can safely go to this environment without having a second thought."
"Compared to other web application firewalls in the market, Imperva does things in the most accurate way."
"The solution is very affordable; it's based on the average traffic utilization, not the DDoS traffic, so if you're being DDoSed, you don't pay extra for the absorption of the DDoS traffic."
"It has fewer false positives"
"The implementation of Imperva Cloud WAF is easy, and because it is a cloud solution with no appliance to install, the actual installation will only take a few hours and full implementation can be completed within 24 hours."
"I would recommend this solution to others; it has been working fine for us, and it has all the features that we need."
"It has threat intelligence and we are using Incapsula. With threat intelligence, we can separate HTTP and HTTPS traffic. We can use Incapsula to send all the threat intelligence to the WAF."
"The three most valuable features that I noticed are the geo-localization of the user, the IP reputation, and the compartmental analysis."
"By publishing the application without fear, my customer has created new revenue by making the website available anytime and anywhere."
 

Cons

"We don't even use Cloudflare Bot Management because it's too expensive; you need to pay per request, and it's much cheaper to get one or two additional machines."
"Cloudflare Web Application Firewall should improve visibility for a customer."
"Support can be challenging at times."
"It would be ideal if the solution offered better log integration and more integration with different platforms."
"A key challenge arises when dealing with numerous integrations with HVAC systems. Depending on the specifics, there might be some configuration mismatches, which necessitate specific support."
"The accuracy of the Cloudflare Web Application Firewall could be improved by reducing the number of false-negative alerts."
"Its stability could be better."
"The dashboard could be more user-friendly."
"Everybody complains about the price of this solution."
"The solution needs to improve Integration with third parties for their on-prem deployment models. The integration is not that good yet."
"The price of Imperva Web Application Firewalls is expensive compared to others."
"We had an issue when securing the web applications for DDoS protection."
"Although we're only using it for the accelerator part, the purging of files and the way this feature functions could use improvement."
"I am looking for more data enrichment. We should have the ability to add our own custom data to the system, to the live traffic."
"One thing that they really could improve on is the depth of the analytics."
"I'd like the option to pick your bot protection."
"The area that should be improved is licensing."
"The area that should be improved is licensing."
 

Pricing and Cost Advice

"The pricing model is very straightforward compared to the competition. You just pay per month for the product and usage."
"We pay $210 per month for CloudFlare WAF."
"It starts at $20 and can easily go up to $200 monthly"
"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."
"The solution is expensive."
"It is not too pricey."
"Cloudflare offers different types of subscriptions for businesses, enterprises, and personal users, and the pricing is negotiable."
"The solution's pricing option needs to be more transparent for enterprise clients."
"The cost is somewhere around $10,000 a site. For every site, you pay individually. For every DNS entry, you have you pay."
"The solution's pricing is an issue."
"Imperva’s pricing is a bit higher in the market since it offers a full-blown WAF."
"Imperva Web Application Firewall is expensive."
"We are satisfied with the pricing."
"Everybody complains about the price of this solution."
"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."
"We sell three-year licenses for Imperva Web Application Firewall to our customers. The price is a little expensive."
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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
Construction Company
17%
Comms Service Provider
9%
Financial Services Firm
9%
Computer Software Company
7%
Financial Services Firm
13%
Manufacturing Company
8%
Computer Software Company
7%
Comms Service Provider
7%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise6
Large Enterprise6
By reviewers
Company SizeCount
Small Business88
Midsize Enterprise25
Large Enterprise69
No data available
 

Questions from the Community

What needs improvement with Cloudflare Web Application Firewall?
I don't see room for improvement to Cloudflare Web Application Firewall. One thing I don't know much about because we...
What is your primary use case for Cloudflare Web Application Firewall?
We are using Cloudflare Web Application Firewall's advanced reporting and analytics tools with their Zero Trust, so e...
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 mana...
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 provi...
What needs improvement with Imperva DDoS?
I would like to see improvements in the pooling of threats and attacks, possibly to enlarge the scale of indicators o...
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Also Known As

Cloudflare WAF
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

crunchbase, udacity, marketo, okcupid, zendesk
Hitachi, BNZ, Bitstamp, Moz, InnoGames, BTCChina, Wix, LivePerson, Zillow and more.
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Find out what your peers are saying about Imperva, Fortinet, F5 and others in Web Application Firewall (WAF). Updated: April 2026.
893,244 professionals have used our research since 2012.