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Klocwork vs OWASP Zap comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Oct 8, 2024

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

Klocwork
Ranking in Static Application Security Testing (SAST)
15th
Average Rating
8.0
Reviews Sentiment
6.8
Number of Reviews
25
Ranking in other categories
Application Security Tools (21st), Static Code Analysis (3rd)
OWASP Zap
Ranking in Static Application Security Testing (SAST)
16th
Average Rating
7.6
Reviews Sentiment
7.3
Number of Reviews
41
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2026, in the Static Application Security Testing (SAST) category, the mindshare of Klocwork is 1.4%, down from 1.7% compared to the previous year. The mindshare of OWASP Zap is 2.7%, down from 5.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Static Application Security Testing (SAST) Mindshare Distribution
ProductMindshare (%)
Klocwork1.4%
OWASP Zap2.7%
Other95.9%
Static Application Security Testing (SAST)
 

Featured Reviews

KG
Manager, Quality, Functional Safety, Cybersecurity Embedded Processing at a manufacturing company with 10,001+ employees
Experience with compliance improvements and efficiency boosts but static analysis engine shows a need for enhancement
One area for improvement is that when customers use different static analysis tools, they report more issues compared to Klocwork. The static analysis engine of Klocwork has areas that need improvement. Customers using different static analysis tools report more issues than with Klocwork, indicating that Klocwork's engine is not as superior. Klocwork should be able to analyze large codebases efficiently, supporting a desktop version for periodic small delta changes before pushing to the server.
Amit Beniwal - PeerSpot reviewer
Project Manager at Al Hassan LLC
Simplifies vulnerability discovery and has high quality support
There are areas for improvement with OWASP Zap, particularly in the alignment of vulnerabilities concerning CVSS scores. Sometimes, a vulnerability initially categorized as high severity may be reduced to medium or low over time after security patches are applied. This alignment with the present severity score and CVSS score could be improved.

Quotes from Members

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

Pros

"One can increase the number of vendors, so the solution is scalable."
"Overall I find Klocwork's features superior for our needs."
"The reporting helps us understand the trend of our results and whether we improve over time. We can see the history within Klocwork's server architecture and know that we're making things better. It creates a great story for our management. We can demonstrate value and how our software is developing over time."
"The customer support team is very responsive, proactive, and engages in conversations to ensure our needs are met."
"The tool helps the team to think beforehand about corner cases or potential bugs that might arise in real-time."
"On-the-fly analysis and incremental analysis are the best parts of Klocwork, and currently we are using both of these features very effectively."
"Klocwork is user-friendly, with a client-server architecture that provides all needed compliance."
"It saves a lot of time when it comes to finding defects, it's basically inputted in every access we do."
"The reporting is quite intuitive, which gives you a clear indication of what kind of vulnerability you have that you can drill down on to gather more information."
"OWASP Zap is a good tool, one of my favorites for a long time, and I would recommend it."
"OWASP is the best."
"The scalability of this product is very good."
"​It has improved my organization with faster security tests.​"
"The interface is easy to use."
"The API is exceptional."
"The stability of the solution is very good."
 

Cons

"Every update that we receive requires of us a lengthy and involved process."
"We bought Klocwork, but it was limited to one little program, but the program is now sort of failing. So, we have a license for usage on a program that is sort of failing, and we really can't use the license on anything else."
"Global variables sometimes generate false positives. Variables with global scopes sometimes produce false positives, which is annoying and time consuming because I get violations from Klocwork which after personal analysis turn out to be not true."
"Klocwork has to improve its features to stay ahead of other free solutions."
"The main problem is that since it only parses the code, the warnings or the problems that are given as a result of the report can sometimes require a lot of effort to analyze."
"There are many things that can be improved. The code used between projects is one of the very painful points in Klocwork."
"I believe it should support more languages, such as Python and JavaScript."
"Under NIST cybersecurity standards, we must address vulnerabilities within a specified time after discovering them. When we try to propagate those updates and fixes through the system, it would be nice if the clients could reconnect to the existing server or have the server dynamically updated in some way. I know that isn't easy, but maybe processes could be enhanced to make that more streamlined from a DevOps perspective."
"If there was an easier to understand exactly what has been checked and what has not been checked, it would make this solution better. We have to trust that it has checked all known vulnerabilities but it's a bit hard to see after the scanning."
"The technical support team must be proactive."
"When comparing OWASP Zap and Burp Suite, the main difference besides pricing is that OWASP Zap has limitations with reporting levels and UI, which affects its reporting capabilities, whereas Burp Suite is already advancing with new AI features and scanning capabilities that OWASP Zap seems to be lacking."
"The reporting feature could be more descriptive."
"The computers perform somewhat slowly when loading a large number of queries into memory."
"It's possibly just a limitation of the product itself but sometimes it won't scan a particular website so you have to manually go in and make some configuration changes."
"As security evolves, we would like DevOps built into it. As of now, Zap does not provide this."
"Right now, I can't give it off to a team and expect them to give me a report that I'm happy with."
 

Pricing and Cost Advice

"Klocwork should not to be quite so heavy handed on the licensing for very specific programs."
"Licensing fees are paid annually, but they also have a perpetual license."
"The pricing for Klocwork is very competitive if you compare it from apple to apple. It has competitive pricing regarding the licensing model and the per-license cost. Klocwork isn't a high-end investment for anyone deploying it; even SMBs can afford it. The Klocwork cost per user would depend on the license type, so I'm unable to mention a ballpark figure because it would depend on the type of installation and how the deployment will be, and the nodes to give an accurate calculation or figure. The total price depends on the package, so my company could never publish pricing for Klocwork on the website. My team first collects information from potential clients on the deployment scenario, project environment, etc., before suggesting a package for Klocwork. My rating for Klocwork in terms of pricing is a five because of its flexible license models. There's a license model for every type of organization, whether small, midsize, or enterprise, so it's a five out of five for me."
"This solution offers competitive pricing."
"When it comes to licensing, the solution has two packages, one for a fixed and the other for a floating server, with the former being more cost effective than the latter."
"The limitation that we have is that Klocwork is licensed to certain programs, and if you want to license them to other programs, you have to pay more money."
"Klocwork is still tight on their licensing. If Klocwork would loosen up on the licensing, and where the license could be used, and how many different programs could be run on it, then we have several development programs that I would love to be able to use it for going forward."
"There are other solutions on the market such as Microsoft Visual Studio. They have been adding more static code analysis features that come for free. It is getting better all the time. That is one of the possibilities is that we've been considering that we may stop using the Klocwork because it doesn't give us any added value."
"This solution is open source and free."
"OWASP ZAP is a free tool provided by OWASP’s engineers and experts. There is an option to donate."
"It's free and open, currently under the Apache 2 license. If ZAP does what you need it to do, selling a free solution is a very easy."
"The solution’s pricing is high."
"The tool is open-source."
"The tool is open source."
"We have used the freeware version. I believe Zap only has freeware."
"This app is completely free and open source. So there is no question about any pricing."
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Top Industries

By visitors reading reviews
Manufacturing Company
21%
Construction Company
9%
Transportation Company
8%
Computer Software Company
6%
Computer Software Company
10%
University
9%
Financial Services Firm
9%
Comms Service Provider
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business12
Midsize Enterprise2
Large Enterprise13
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise11
Large Enterprise22
 

Questions from the Community

What is your experience regarding pricing and costs for Klocwork?
Klocwork's pricing seems attractive, as it uses a per-user license model that does not have a lot of overhead.
What needs improvement with Klocwork?
One area for improvement is that when customers use different static analysis tools, they report more issues compared to Klocwork. The static analysis engine of Klocwork has areas that need improve...
What is your primary use case for Klocwork?
I work on tools such as Klocwork, LDRA, as well as Jira and Confluence, focusing more on the software quality assurance aspect. We use Klocwork for coding and aggregate checks. We use it for static...
Is OWASP Zap better than PortSwigger Burp Suite Pro?
OWASP Zap and PortSwigger Burp Suite Pro have many similar features. OWASP Zap has web application scanning available with basic security vulnerabilities while Burp Suite Pro has it available with ...
What is your experience regarding pricing and costs for OWASP Zap?
OWASP might be cost-effective, however, people prefer to use the free edition available as open source.
What needs improvement with OWASP Zap?
The improvement that has to be done for APIs focuses on manual activities where the feature exists, but it is not at the same level as what Burp Suite does with intercepting and tools such as Postm...
 

Comparisons

 

Overview

 

Sample Customers

ACCESS Co Ltd, Risk-AI, Winbond Electronics, Bristol-Myers Squibb Pharmaceutical Research Institute, University of Southern California, Alebra Technologies, SIMULIA, Risk Management Solutions, Brigham Young University, SRD, HRL
1. Google 2. Microsoft 3. IBM 4. Amazon 5. Facebook 6. Twitter 7. LinkedIn 8. Netflix 9. Adobe 10. PayPal 11. Salesforce 12. Cisco 13. Oracle 14. Intel 15. HP 16. Dell 17. VMware 18. Symantec 19. McAfee 20. Citrix 21. Red Hat 22. Juniper Networks 23. SAP 24. Accenture 25. Deloitte 26. Ernst & Young 27. PwC 28. KPMG 29. Capgemini 30. Infosys 31. Wipro 32. TCS
Find out what your peers are saying about Klocwork vs. OWASP Zap and other solutions. Updated: August 2026.
909,725 professionals have used our research since 2012.