Try our new research platform with insights from 80,000+ expert users

Imperva Application Security Platform vs The Fastly Next-Gen WAF (powered by Signal Sciences) comparison

Sponsored
 

Comparison Buyer's Guide

Executive SummaryUpdated on Sep 17, 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
Sponsored
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
77
Ranking in other categories
CDN (1st), Distributed Denial-of-Service (DDoS) Protection (1st), Managed DNS (1st), Cloud Security Posture Management (CSPM) (12th)
Imperva Application Securit...
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
133
Ranking in other categories
CDN (4th), Web Application Firewall (WAF) (4th), Distributed Denial-of-Service (DDoS) Protection (4th), Bot Management (2nd), API Security (2nd)
The Fastly Next-Gen WAF (po...
Average Rating
7.6
Reviews Sentiment
4.8
Number of Reviews
4
Ranking in other categories
Web Application Firewall (WAF) (28th)
 

Featured Reviews

Carlos Alam Hernandez Baruch - PeerSpot reviewer
Fast and secure deployments simplify operations for government and fintech clients
It is a fast and secure DNS. It is very easy to deploy, and my customers are happy with this tool. Additionally, the CDN performance in Mexico is excellent, providing fast service and tools. It offers reliability during high-traffic periods, ensuring no impact on the environment. It helps my clients avoid using on-premise boxes, simplifying operations as they only use the prices on Cloudflare.
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.
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

"Cloudflare allows us to self-host services such as Rocket.Chat and Node-RED, in high-availability mode, thanks to round robin DNS which allows us to share one hostname between our two locations."
"Cloudflare offers CDN and DDoS protection. We have the front end, API, and database in how you structure applications."
"The most valuable feature of Cloudflare DNS is security."
"Cloudflare DNS is widely used, and it's good for websites. If we use Cloudflare DNS and update one record, it updates in their office instantly."
"What I like best about Cloudflare is that my company can use it to trace and manage applications and monitor traffic. The solution tells you if there's a spike in traffic. Cloudflare also sends you a link to check your equipment and deployment and track it through peering, so it's a valuable tool."
"When using services like Heroku, Cloudflare is very useful for CNAME flattening. I also use it for their end-to-end SSL with TLS authentication on nginx for securing servers."
"The most valuable feature is the web application firewall."
"The UI is good."
"It is an effective threat mitigation tool."
"The most valuable feature of Imperva, in addition to its strong knowledge base, is its effective protection for web applications."
"DDoS protection and WAF are the most valuable features. It is easy to deploy a service. It is easy and quick to deploy to a new website."
"Learning mode and custom policies are helpful features."
"The valuable features of Imperva WAF include its effective security breach prevention through automatically updating rules."
"The most valuable features for us are the DDoS and Bot."
"The features I have found most valuable with Imperva Web Application Firewall are account takeover protection, advanced bot protection, and API security."
"​Technical support provides good, quick responses."
"The product's most valuable feature is its ability to set up the rules easily."
"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."
 

Cons

"Technical support is lacking."
"In the last two years, there has been a certain amount of downtime when using the VDM."
"Cloudflare's free plan is limited to 5,000 records for their free plan. They should increase that. For example, if I create a domain called abc.com and a subdomain called a.abc.com, my record count will be two. I can make a maximum of 5,000 subdomains. However, if we use our own DNS hosted on another provider, there is no limit. Their free plan also lacks name server customization."
"We're facing challenges due to an upgrade in the machine learning model. The problem arises from some users abusing the APIs, resulting in an influx of suspicious traffic. Cloudflare's learning model mistakenly identifies this traffic as human. Consequently, it assigns it a higher trust score, akin to legitimate human traffic, causing complications in our architecture. Previously, such traffic would have been categorized as suspicious, enabling us to apply appropriate blocking rules. However, we encounter difficulties distinguishing between genuine and suspicious traffic with the new categorization. Despite these challenges, overall, Cloudflare remains the preferred solution compared to Azure, AWS CloudFront, and Google Cloud Armor."
"Sometimes their more advanced caching tools can cause higher first-byte times and problems with JavaScript."
"If they improve on the placement of their data centers, it would be better. I'm living in a remote area. I would like to connect to them without any kind of lag."
"The solution could be more user-friendly."
"Areas like how assessment, discovery, and payload are dealt with and how it all comes into your organization can be considered when trying to make suggestions to Cloudflare for improvements."
"The Imperva Web Application Firewall automations are good, but there is still room for improvement with them."
"It's a complicated tool to keep."
"The tool's UI is complicated. It would be best to have a more accessible UI dashboard to make the job easier."
"Their portal is very limited and needs improvement."
"Sometimes, support tickets don't get addressed quickly."
"The tool needs to improve CPU and storage memory."
"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."
"Certificate management could be improved."
"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."
"Even if we create some custom rules, Signal Sciences cannot capture some of the malicious traffic."
"The UI is not very intuitive and could be better."
 

Pricing and Cost Advice

"The product's pricing is cheap."
"A free version of the solution is available."
"We are using the free version."
"The solution has many features but there are ones that you need to pay for. Sometimes you have to find out which is available for free and which you have to pay for."
"So far I use free tier and happy with it. You can subscribe to business package if needed."
"The solution is expensive when compared to other products but offers unlimited bandwidth."
"The tool is a premium product, so it is very expensive."
"The cost primarily depends on the size of the organization."
"The tool's pricing is good."
"The price of this solution is a little bit high compared to competitors."
"For enterprise contracts you will be in touch with a dedicated account manager who will guide you regarding licensing."
"There is a license or subscription renewal that our customers pay."
"Everybody complains about the price of this solution."
"The cost of this solution depends on the platform."
"I rate the product price a four on a scale of one to ten, where one is a low price, and ten is a high price."
"The license is on a yearly basis."
"Signal Sciences is pretty cheap compared to other solutions."
"The product has an affordable cost."
"The pricing is 50% less than Akamai."
report
Use our free recommendation engine to learn which Web Application Firewall (WAF) solutions are best for your needs.
872,846 professionals have used our research since 2012.
 

Comparison Review

it_user68487 - PeerSpot reviewer
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…
 

Top Industries

By visitors reading reviews
Computer Software Company
13%
Comms Service Provider
11%
Financial Services Firm
10%
Manufacturing Company
7%
Financial Services Firm
13%
Computer Software Company
12%
Manufacturing Company
9%
Insurance Company
6%
Computer Software Company
12%
Retailer
11%
Manufacturing Company
11%
Financial Services Firm
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business46
Midsize Enterprise8
Large Enterprise25
By reviewers
Company SizeCount
Small Business83
Midsize Enterprise25
Large Enterprise61
No data available
 

Questions from the Community

Which is the best DDoS protection solution for a big ISP for monitoring and mitigating?
Cloudflare. We are moving from Akamai prolexic to Cloudflare. Cloudflare anycast network outperforms Akamai static GR...
Which would you choose - Cloudflare DNS or Quad9?
Cloudflare DNS is a very fast, very reliable public DNS resolver. It is an enterprise-grade authoritative DNS service...
What do you like most about Cloudflare?
Cloudflare offers CDN and DDoS protection. We have the front end, API, and database in how you structure applications.
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 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 provi...
What do you like most about Signal Sciences?
The product's most valuable feature is its ability to set up the rules easily.
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-makin...
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 i...
 

Also Known As

Cloudflare DNS
Imperva Bot Management, Imperva Web Application Firewall, Imperva API Security
Signal Sciences Next-Gen WAF, Signal Sciences RASP
 

Overview

 

Sample Customers

Trusted by over 9,000,000 Internet Applications and APIs, including Nasdaq, Zendesk, Crunchbase, Steve Madden, OkCupid, Cisco, Quizlet, Discord and more.
Hitachi, BNZ, Bitstamp, Moz, InnoGames, BTCChina, Wix, LivePerson, Zillow and more.
Chef, Adobe, Datadog, Etsy, GrubHub, Vimeo, SendGrid, Under Armour, Duo, AppNexus
Find out what your peers are saying about Imperva Application Security Platform vs. The Fastly Next-Gen WAF (powered by Signal Sciences) and other solutions. Updated: September 2025.
872,846 professionals have used our research since 2012.