Checkmarx vs Nessus: Which is Better in 2026?
Choosing between Checkmarx and Nessus 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:
Checkmarx
Application security testing platform
Best for you if:
- • You need security features specifically
- • 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
Nessus
Vulnerability assessment scanner
Best for you if:
- • You need vulnerability scanning features specifically
- • Nessus is a vulnerability scanner for identifying security issues
- • It scans networks and systems for vulnerabilities, misconfigurations, and malware
| At a Glance |  Checkmarx |  Nessus |
|---|---|---|
Starts at | Custom | $2990/moProfessional |
Best For | Security | Vulnerability Scanning |
Rating | 4.2/5 | 4.6/5 |
Free plan | No | No |
Choose Checkmarx or Nessus?
Choose Checkmarx if
Application security testing platform
- Enterprise SAST
- Good vulnerability detection
- CI/CD integration
- Your work is security-shaped, not vulnerability scanning-shaped
Choose Nessus if
Vulnerability assessment scanner
- Industry standard scanner
- Good vulnerability detection
- Comprehensive coverage
- Your work is vulnerability scanning-shaped, not security-shaped
| Feature | Checkmarx | Nessus |
|---|---|---|
| Pricing Model | Paid | Paid |
| User Rating | ★4.2/5 65 reviews | ★4.6/5 380 reviews |
| Categories | SecurityDeveloper Tools | Vulnerability ScanningSecurity |
In-Depth Analysis
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
Nessus
Vulnerability assessment scanner
Strengths
- +Industry standard scanner
- +Good vulnerability detection
- +Comprehensive coverage
- +Good reporting
- +Active development
Weaknesses
- -Expensive
- -Learning curve
- -Resource intensive
- -Per-asset pricing
- -Better alternatives exist
Key features
Pricing: Checkmarx vs Nessus
| Plan | Checkmarx | Nessus |
|---|---|---|
| Tier 1 | custom Essentials | Free Essentials (Free) |
| Tier 2 | custom Professional | $2990 Professional |
| Tier 3 | custom Enterprise | $5890 Expert |
Pricing verified from each vendor's public pricing page. Compare in detail on Checkmarx pricing and Nessus pricing.
Who Should Use What?
On a budget?
Both are paid. Compare plans on their websites.
Go with: Nessus
Want the highest-rated option?
Checkmarx: 4.2/5 (65 reviews). Nessus: 4.6/5 (380 reviews).
Go with: Nessus
Value user reviews?
Checkmarx: 65 reviews (4.2/5). Nessus: 380 reviews (4.6/5).
Go with: Nessus
3 Questions to Help You Decide
What's your budget?
Both are paid. Pricing won't help you decide here.
What's your use case?
Checkmarx is a security tool. Nessus is in vulnerability scanning. Pick the category that matches your needs.
How important are ratings?
Nessus is rated higher: 4.6/5 vs 4.2/5.
Key Takeaways
Nessus
- Higher user rating: 4.6/5 vs 4.2/5
- Larger review base (380 reviews)
- Our pick for this comparison
Checkmarx
- Better fit for security
The Bottom Line
Nessus is our pick.
Frequently Asked Questions
Is Checkmarx or Nessus better?
Nessus is rated in our evaluation. Both are paid.
What are Checkmarx and Nessus used for?
Checkmarx: Application security testing platform. Nessus: Vulnerability assessment scanner.
What does Checkmarx cost vs Nessus?
Checkmarx is a paid tool. Nessus is a paid tool. Visit their websites for detailed pricing.