OWASP ZAP vs Checkmarx: Which is Better in 2026?
Choosing between OWASP ZAP and Checkmarx comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
OWASP ZAP
Open-source web application security scanner
Best for you if:
- • You need something completely free
- • OWASP ZAP is a free security testing tool for finding web application vulnerabilities
- • It scans for security issues with automated and manual testing capabilities
Checkmarx
Application security testing platform
Best for you if:
- • Checkmarx is an enterprise application security testing platform for finding vulnerabilities in code
- • It provides SAST, SCA, and DAST scanning integrated into CI/CD pipelines
| At a Glance |  OWASP ZAP |  Checkmarx |
|---|---|---|
Starts at | Free | Paid |
Best For | Security | Security |
Rating | - | - |
Choose OWASP ZAP or Checkmarx?
Choose OWASP ZAP if
Open-source web application security scanner
- Free security scanner
- Good for web apps
- Active community
- You want a fully free tool (Checkmarx requires payment)
Choose Checkmarx if
Application security testing platform
- Enterprise SAST
- Good vulnerability detection
- CI/CD integration
| Feature | OWASP ZAP | Checkmarx |
|---|---|---|
| Pricing Model | Free | Paid |
| User Rating | ★4.5/5 22 reviews | ★4.2/5 65 reviews |
| Categories | SecurityTesting & QA | SecurityDeveloper Tools |
In-Depth Analysis
OWASP ZAP
Open-source web application security scanner
Strengths
- +Free security scanner
- +Good for web apps
- +Active community
- +CI/CD integration
- +Open source
Weaknesses
- -Learning curve
- -False positives
- -Performance varies
- -UI dated
- -Configuration needed
Key features
Checkmarx
Application security testing platform
Strengths
- +Enterprise SAST
- +Good vulnerability detection
- +CI/CD integration
- +Compliance support
- +Many languages
Weaknesses
- -Very expensive
- -False positives
- -Learning curve
- -Complex setup
- -Slow scans
Key features
Pricing: OWASP ZAP vs Checkmarx
| Plan | OWASP ZAP | Checkmarx |
|---|---|---|
| Tier 1 | Free Free | custom Essentials |
| Tier 2 | N/A | custom Professional |
| Tier 3 | N/A | custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on OWASP ZAP pricing and Checkmarx pricing.
Who Should Use What?
On a budget?
OWASP ZAP is free. Checkmarx is paid.
Go with: OWASP ZAP
Want the highest-rated option?
Neither has user reviews yet.
Go with: OWASP ZAP
Value user reviews?
Neither has user reviews yet.
Go with: OWASP ZAP
3 Questions to Help You Decide
What's your budget?
OWASP ZAP is free. Checkmarx is paid. Go with OWASP ZAP if free matters most.
What's your use case?
Both are security tools. Compare their specific features to decide.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
OWASP ZAP
- Higher user rating: 4.5/5 vs 4.2/5
- Completely free
- Our pick for this comparison
Checkmarx
- Larger review base (65 reviews)
The Bottom Line
OWASP ZAP is our pick.
Frequently Asked Questions
Is OWASP ZAP or Checkmarx better?
OWASP ZAP is rated in our evaluation. OWASP ZAP is free and Checkmarx is paid.
What are OWASP ZAP and Checkmarx used for?
OWASP ZAP: Open-source web application security scanner. Checkmarx: Application security testing platform.
What does OWASP ZAP cost vs Checkmarx?
OWASP ZAP is completely free. Checkmarx is a paid tool. Visit their websites for detailed pricing.