Checkmarx One vs Defensics Protocol Fuzzing comparison

Why PeerSpot?

The compared Checkmarx and Black Duck solutions aren't in the same category. Checkmarx is ranked #2 in AS , with an average rating of 8.3, and holds a 6.8% mindshare in the category. Black Duck is ranked #4 in FTT , and holds a 16.1% mindshare. Additionally, 88% of Checkmarx users are willing to recommend the solution, compared to 100% of Black Duck users who would recommend it.

Checkmarx One

Read 81 Checkmarx One reviews

31,996 Views
16,958 Comparison Views

88% willing to recommend

Defensics Protocol Fuzzing

Read 4 Defensics Protocol Fuzzing reviews

2,162 Views
303 Comparison Views

100% willing to recommend

Checkmarx One

Defensics Protocol Fuzzing

Comparison Buyer's Guide

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Executive Summary

We performed a comparison between Checkmarx One and Defensics Protocol Fuzzing based on real PeerSpot user reviews.

Find out what your peers are saying about SonarSource Sàrl, Checkmarx, Veracode and others in Application Security Tools.

To learn more, read our detailed Application Security Tools Report (Updated: October 2026).

Buyer's Guide

Application Security Tools

October 2026

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Helped 921,028 peers since 2012

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

Checkmarx One

Average Rating

7.8

Reviews Sentiment

6.6

Number of Reviews

Ranking in other categories

Application Security Tools (2nd), Static Application Security Testing (SAST) (2nd), Vulnerability Management (13th), Container Security (15th), Static Code Analysis (2nd), API Security (7th), Dynamic Application Security Testing (DAST) (2nd), DevSecOps (3rd), Risk-Based Vulnerability Management (10th), Application Security Posture Management (ASPM) (4th), AI Security (4th)

Defensics Protocol Fuzzing

Average Rating

8.6

Number of Reviews

Ranking in other categories

Fuzz Testing Tools (4th)

Mindshare comparison

While both are Quality Assurance solutions, they serve different purposes. Checkmarx One is designed for Application Security Tools and holds a mindshare of 6.8%, down 10.3% compared to last year.
Defensics Protocol Fuzzing, on the other hand, focuses on Fuzz Testing Tools, holds 16.1% mindshare, down 22.4% since last year.

Application Security Tools Mindshare Distribution
Product	Mindshare (%)
Checkmarx One	6.8%
SonarQube	10.2%
Snyk	4.8%
Other	78.2%

Application Security Tools

Fuzz Testing Tools Mindshare Distribution
Product	Mindshare (%)
Defensics Protocol Fuzzing	16.1%
PortSwigger Burp Suite Professional	35.2%
GitLab	30.2%
Other	18.5%

Fuzz Testing Tools

Featured Reviews

Shahzad Shahzad

Senior Solution Architect | L3+ Systems & Cloud Engineer | SRE Specialist at Canada Cloud Solution

Enable secure development workflows while identifying opportunities for faster scans and improved AI guidance

Checkmarx One is a very strong platform, but there are several areas where it can improve to support modern DevSecOps workflows even better. For example, better real-time developer guidance is needed. The IDE plugin should offer richer AI-powered auto-fixes similar to SNYK Code or GitHub Copilot Security, as current guidance is good but not deeply contextual for large-scale enterprise codebases. This matters because it reduces developer friction and accelerates shift-left adoption. More transparency control over the correlation engines is another need. The correlation engine is powerful but not fully transparent. Users want to understand why vulnerabilities were correlated or de-prioritized, which helps AppSec teams trust the prioritization logic. Faster SAST scan and more language coverage is needed since SAST scan can still be slow for very large mono-repos and there is limited deep support for new language frameworks like Rust and Go, along with advanced coverage for serverless-specific frameworks. This matters because large organizations want sub-minute scans in CI/CD as cloud-native ecosystems evolve fast. A strong API security module is another area for enhancement. API security scanning could be improved with active testing, API discovery, full Swagger, OpenAPI, drift detection, and schema-based fuzzing. This is important as API attacks are one of the biggest AppSec risks in 2025. Checkmarx One is strong, but I see a few areas for improvement including faster SAST scanning for large mono-repos, deeper language framework support, more transparent correlation logic, and stronger API security that includes discovery and runtime context. The IDE plugin could offer more AI-assisted fixes, and the SBOM lifecycle tracking can evolve further. Enhancing integration with SIEM and SOAR would also make enterprise adoption smoother, and these improvements would help developers and AppSec teams move faster with more accuracy.

Read full review

Sarath Kumar Choday

Senior Technical Lead at HCL Technologies

Product security tests for switches and router sections

Codenomicon Defensics should be more advanced for the testing sector. It should be somewhat easy and flexible to install. What I see in the documentation isn't that. Even if something doesn't malfunction, sometimes it is hard to install and execute. The product needs video documentation. This would help a lot more.

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

"Overall, I use Checkmarx One as a strategic control point to improve developer velocity while strengthening application security across the full software lifecycle."

"The main advantage of this solution is its centralized reporting functionality, which lets us track issues, then see and report on the priorities via a web portal."

"The only thing I like is that Checkmarx does not need to compile."

"It is very useful because it fits our requirements. It is also easy to use. It is not complex, and we are satisfied with the results."

"The main thing we find valuable about Checkmarx is the ease of use, as it's easy to initiate scans and triage defects."

"The features and technologies are very good. The flexibility and the roadmap have also been very good. They're at the forefront of delivering the additional capabilities that are required with cloud delivery, etc. Their ability to deliver what customers require and when they require is very important."

"We have used this product to verify the dev department's code in order to minimize security holes."

"The feature that I have found most valuable is that its number of false positives is less than the other security application platforms, its ease of use is another good feature, and it also supports most of the languages."

More Checkmarx One pros

"We have found multiple issues in our embedded system network protocols, related to buffer overflow. We have reduced some of these issues."

"ROI was 100%. Since there are no product suites available that provide the level of testing available with Codenomicon, the development, quality and security assurance departments know that the investment was correct."

"The stability of this product is great; we tested it under multiple constraints and even on cloud services it is absolutely stable."

"The product is related to US usage with TLS contact fees, i.e. how more data center connections will help lower networking costs."

"Whatever the test suit they give, it is intelligent; it will understand the protocol and it will generate the test cases based on the protocol: protocol, message sequence, protocol, message structure, and because of that, we can eliminate a lot of unwanted test cases so we can execute the tests and complete them very quickly."

"Simple and straightforward GUI."

Cons

"The purchase of this solution was a mistake. I would advise others to deploy the solution and to test all of the functionality before buying and do not trust the marketing from Checkmarx."

"The default module that provides statistics is basic, and you need more elaborate information to do vulnerability management."

"Checkmarx is not good because it has too many false positive issues."

"Some of the descriptions were found to be missing or were not as elaborate as compared to other descriptions. Although, they could be found across various standard sources but it would save a lot of time for developers, if this was fixed."

"The lack of ability to review compiled source code. It would then be able to compete with other scanning tools, such as Veracode."

"The product can be improved by continuing to expand the application languages and frameworks that can be scanned for vulnerabilities. This includes expanded coverage for mobile applications as well as open-source development tools."

"We are trying to find out if there is a way to identify the run-time null values. I am analyzing different tools to check if there is any tool that supports run-time null value identification, but I don't think any of the tools in the market currently supports this feature. It would be helpful if Checkmarx can identify and throw an exception for a null value at the run time. It would make things a lot easier if there is a way for Checkmarx to identify nullable fields or hard-coded values in the code. The accessibility for customized Checkmarx rules is currently limited and should be improved. In addition, it would be great if Checkmarx can do static code and dynamic code validation. It does a lot of security-related scanning, and it should also do static code and dynamic code validation. Currently, for security-related validation, we are using Checkmarx, and for static code and dynamic code validation, we are using some other tools. We are spending money on different tools. We can pay a little extra money and use Checkmarx for everything."

"This solution is not very easily scalable, and seems to lack the capability to manage a high volume of applications."

More Checkmarx One cons

"It requires understanding the Defensics protocol."

"Sometimes, when we are testing embedded devices, when we trigger the test cases, the target will crash immediately. It is very difficult for us to identify the root cause of the crash because they do not provide sophisticated tools on the target side. They cover only the client-side application... They do not have diagnostic tools for the target side. Rather, they have them but they are very minimal and not very helpful."

"It does not support the complete protocol stack. There are some IoT protocols that are not supported and new protocols that are not supported."

"You can't implement proprietary ciphering algorithms, nor can you modify protocol models if you need to test customized public protocols."

"Codenomicon Defensics should be more advanced for the testing sector. It should be somewhat easy and flexible to install."

Pricing and Cost Advice

"The price of Checkmarx could be reduced to match their competitors, it is expensive."

"The solution is costly."

"The interface used to create custom rules comes at an additional cost."

"It's relatively expensive."

"Checkmarx is comparatively costlier than other products, which is why some of the customers feel reluctant to go for it, though performance-wise, Checkmarx can compete with other products."

"Be cautious of the one-year subscription date. Once it expires, your price will go up."

"Most of my customers opted for a perpetual license. They prefer to pay the highest amount up front for the perpetual license and then pay for additional support annually."

"The tool's pricing is fine."

More Checkmarx One pricing and cost advice

"Licensing is a bit expensive."

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Top Industries

By visitors reading reviews

Financial Services Firm

14%

Manufacturing Company

Outsourcing Company

Computer Software Company

Financial Services Firm

10%

Comms Service Provider

10%

Computer Software Company

Manufacturing Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	32
Midsize Enterprise	9
Large Enterprise	46

No data available

Questions from the Community

What alternatives are there for Fortify WebInspect and Fortify SCA?

I would like to recommend Checkmarx. With Checkmarx, you are able to have an all in one solution for SAST and SCA as well. Veracode is only a cloud solution. Hope this helps.

See all answers

What is the biggest difference between Veracode and Checkmarx?

According to my experience of using both the tools in different organizations Veracode is a Cloud-native, managed AppSec platform with strong focus on ease of use, it is SaaS delivery, and provide...

See all answers

What is your experience regarding pricing and costs for Checkmarx?

Checkmarx One is a premium solution, so budget accordingly. Make sure you understand how licensing scales with additional applications and users. I advise negotiating multi-year contracts or bundle...

See all answers

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Comparisons

SonarQube vs Checkmarx One

Compared 20% of the time

Veracode vs Checkmarx One

Compared 3% of the time

Checkmarx SAST vs Checkmarx One

Compared 2% of the time

Snyk vs Checkmarx One

Compared 2% of the time

HCL AppScan vs Checkmarx One

Compared 2% of the time

More Checkmarx One Competitors

PortSwigger Burp Suite Professional vs Defensics Protocol Fuzzing

Compared 7% of the time

GitLab vs Defensics Protocol Fuzzing

Compared 6% of the time

SonarQube vs Defensics Protocol Fuzzing

Compared 6% of the time

Blue Cedar vs Defensics Protocol Fuzzing

Compared 5% of the time

Mend.io vs Defensics Protocol Fuzzing

Compared 4% of the time

More Defensics Protocol Fuzzing Competitors

Product Reports

Buyer's Guide

Checkmarx One

November 2026

Download Checkmarx One product report

Buyer's Guide

Defensics Protocol Fuzzing vs. GitLab

September 2026

Download Defensics Protocol Fuzzing product report

Also Known As

No data available

Codenomicon Defensics

Overview

Checkmarx One delivers robust security through seamless integration with SCM and CI/CD tools, ensuring reliable SAST and SCA. Primarily used by organizations for vulnerability detection, it supports cloud and on-premises deployment to enhance secure coding practices.

Checkmarx One provides organizations with comprehensive tools for secure software development, integrating effectively with CI/CD pipelines to scan thousands of applications. Its capabilities extend to identifying vulnerabilities in both code bases and third-party software. Enhancing workflow by supporting SCM solutions, it assists in maintaining secure coding standards and compliance. While excelling in various areas, it requires improvements in scan speed, reduction of false positives, and broader platform integration, particularly for COBOL and Swift. Its pricing model is noted as high, and demand exists for better tutorials and documentation.

What are the key features of Checkmarx One?

Comprehensive Integration: Seamlessly connects with SCM, CI/CD tools to streamline security workflows.
Accurate SAST and SCA: Precisely identifies vulnerabilities down to the exact line of code.
Custom Rules Configuration: Allows tailored security measures to match specific needs.
Quick Scanning: Provides fast analysis to speed up the development process.
Automated Code Remediation: Helps in efficiently fixing code vulnerabilities.

What benefits should users expect in reviews?

Improved Security: Enhances code safety, reducing vulnerabilities efficiently.
Effective False Positivity Management: Optimizes time spent on genuine issues.
Enhanced Development Processes: Integrates smoothly to boost secure coding initiatives.
Comprehensive Language Support: Facilitates scanning in multiple programming languages, accommodating diverse needs.

Industries implement Checkmarx One for secure coding compliance and vulnerability management across varying environments, choosing between cloud and on-premises deployment based on requirements. Its extensive language support and integration with DevSecOps practices make it a popular choice for organizations aiming to enhance software security.

Checkmarx

Defensics Protocol Fuzzing enhances security testing by identifying vulnerabilities using its protocol-aware capabilities. It offers structured fuzzing to ensure protocols are thoroughly evaluated for robustness against malicious inputs.

Defensics Protocol Fuzzing stands out for its ability to systematically uncover security flaws across a wide array of network protocols. The tool applies extensive fuzz testing processes, enabling organizations to minimize risks associated with unintentional security holes. By simulating attacks and edge cases, it ensures systems are preemptively fortified against potential threats. Security teams benefit from its automated approach, which saves valuable resources and time while improving the overall resilience of the network infrastructure.

What are the key features of Defensics Protocol Fuzzing?

Comprehensive Test Suite: Offers a broad range of protocol tests that simulate a variety of attack vectors.
Automated Fuzzing: Automates the fuzz testing process to maximize efficiency and coverage.
Protocol-aware Analysis: Precisely targets specific protocol implementations to identify weaknesses.
Detailed Reporting: Provides insights and actionable details about detected vulnerabilities.

What benefits can users expect to see from reviews?

Increased Security: Strengthens network defense by preemptively identifying vulnerabilities.
Time Efficiency: Reduces the time spent on manual security checks through automation.
Risk Reduction: Lowers the likelihood of breaches by addressing protocol flaws early.
Cost Savings: Minimizes costs linked to potential security breaches through proactive measures.

In industries such as telecommunications, finance, and healthcare, Defensics Protocol Fuzzing is implemented to protect sensitive data and maintain service reliability. Its targeted approach ensures that industry-specific protocols are fortified, meeting regulatory and security requirements critical to each sector. By providing a layer of defense against potential exploits, it is a vital part of an organization's security strategy.

Black Duck

Sample Customers

YIT, Salesforce, Coca-Cola, SAP, U.S. Army, Liveperson, Playtech Case Study: Liveperson Implements Innovative Secure SDLC

Coriant, CERT-FI, Next Generation Networks

Buyer's Guide

Application Security Tools

October 2026

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