Checkmarx One vs Defensics Protocol Fuzzing comparison

The compared Checkmarx and Black Duck solutions aren't in the same category. Checkmarx is ranked #2 in AS , with an average rating of 8.1, and holds a 8.8% mindshare in the category. Black Duck is ranked #4 in FTT , and holds a 16.0% 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

22,245 Views
14,237 Comparison Views

88% willing to recommend

Defensics Protocol Fuzzing

Read 4 Defensics Protocol Fuzzing reviews

1,569 Views
173 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: May 2026).

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Application Security Tools

May 2026

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Helped 893,221 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 (16th), Container Security (15th), Static Code Analysis (2nd), API Security (4th), Dynamic Application Security Testing (DAST) (2nd), DevSecOps (2nd), Risk-Based Vulnerability Management (10th), Application Security Posture Management (ASPM) (3rd), AI Security (1st)

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 8.8%, down 10.2% compared to last year.
Defensics Protocol Fuzzing, on the other hand, focuses on Fuzz Testing Tools, holds 16.0% mindshare, down 25.3% since last year.

Application Security Tools Mindshare Distribution
Product	Mindshare (%)
Checkmarx One	8.8%
SonarQube	13.6%
Snyk	5.1%
Other	72.5%

Application Security Tools

Fuzz Testing Tools Mindshare Distribution
Product	Mindshare (%)
Defensics Protocol Fuzzing	16.0%
PortSwigger Burp Suite Professional	33.6%
GitLab	29.2%
Other	21.200000000000003%

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, the ability to find vulnerabilities in the code is better than the tool that we were using before."

"The UI is user-friendly."

"What I like best about Checkmarx is that it has fewer false positives than other products, giving you better results."

"The reports are very good because they include details on the code level, and make suggestions about how to fix the problems."

"It is very easy to insert the tool in the SDLC because there are a wide variety of ways to access the source-code, initiate scans, and review the results."

"Checkmarx has helped us deliver more secure products. We are able to do static code analysis with the tool before shipping our code to production. When the integration is in the pipeline, this tool gives us early notifications on code fixes."

"We use the solution to validate the source code and do SAST and security analysis."

"They have some of the best features which make the product wonderful."

More Checkmarx One pros

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

"Simple and straightforward GUI."

"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 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... Because of that, we can eliminate a lot of unwanted test cases, so we can execute the tests and complete them very quickly."

"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."

Cons

"It would be really helpful if the level of confidence was included, with respect to identified issues."

"I think the CxAudit tool has room for improvement. At the beginning you can choose a scan of a project, but in any event the project must be scanned again (wasting time)."

"Licensing models and Swift language support are the aspects in which this product needs to improve."

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

"They should make it more container-friendly and optimized for the CI pipeline. They should make it a little less heavy. Right now, it requires a SQL database, and the way the tool works is that it has an engine and then it has an analysis database in which it stores the information. So, it is pretty heavy from that perspective because you have to have a full SQL Server. They're working on something called Checkmarx Light, which is a slim-down version. They haven't released it yet, but that's what we need. There should be something a little more slimmed down that can just run the analysis and output the results in a format that's readable as opposed to having a full, really big, and thick deployment with a full database server."

"The plugins for the development environment have room for improvements such as for Android Studio and X code."

"Checkmarx reports many false positives that we need to manually segregate and mark “Not exploitable”."

"The cost per user is high and should be reduced."

More Checkmarx One cons

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

"It requires understanding the Defensics protocol."

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

"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."

"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."

Pricing and Cost Advice

"The license has a vague language around P1 issues and the associated support. Make sure to review these in order to align them with your organizational policies."

"It's relatively expensive."

"The average deal size was usually anywhere between $120K to $175K on an annual basis, which could be divided across 12 months."

"I would rate the solution’s pricing an eight out of ten. The tool’s pricing is higher than others and it is for the license alone."

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

"We're using a commercial version of Checkmarx, and we paid for the solution for one year. The price is high and could be reduced."

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

"It is an expensive solution."

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

17%

Manufacturing Company

Computer Software Company

Government

Computer Software Company

15%

Manufacturing Company

11%

Financial Services Firm

Retailer

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 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

What needs improvement with Checkmarx?

One way Checkmarx One could be improved is if it could automatically run scans every month after implementation. If it is possible to set it in the SAST portal to scan the repositories automaticall...

See all answers

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Comparisons

SonarQube vs Checkmarx One

Compared 37% of the time

Veracode vs Checkmarx One

Compared 3% of the time

Checkmarx SAST vs Checkmarx One

Compared 2% of the time

OpenText Core Application Security vs Checkmarx One

Compared 2% of the time

Fortify Software Security Center vs Checkmarx One

Compared 2% of the time

More Checkmarx One Competitors

SonarQube vs Defensics Protocol Fuzzing

Compared 7% of the time

Blue Cedar vs Defensics Protocol Fuzzing

Compared 7% of the time

GitLab vs Defensics Protocol Fuzzing

Compared 6% of the time

HCL AppScan vs Defensics Protocol Fuzzing

Compared 6% of the time

Coverity Static vs Defensics Protocol Fuzzing

Compared 6% of the time

More Defensics Protocol Fuzzing Competitors

Product Reports

Buyer's Guide

Checkmarx One

May 2026

Download Checkmarx One product report

Buyer's Guide

Defensics Protocol Fuzzing vs. GitLab

April 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

May 2026

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