Nessus vs Wazuh: Which is Better in 2026?
Choosing between Nessus and Wazuh 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:
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
Wazuh
Open-source security monitoring
Best for you if:
- • You need something completely free
- • You need security monitoring features specifically
- • Wazuh is an open-source security monitoring platform
- • It provides threat detection, compliance, and incident response
| At a Glance |  Nessus | |
|---|---|---|
Starts at | $2990/moProfessional | FreeFree tier available |
Best For | Vulnerability Scanning | Security Monitoring |
Rating | 4.6/5 | 4.5/5 |
Free plan | No | Yes |
Choose Nessus or Wazuh?
Choose Nessus if
Vulnerability assessment scanner
- Industry standard scanner
- Good vulnerability detection
- Comprehensive coverage
- Your work is vulnerability scanning-shaped, not security monitoring-shaped
Choose Wazuh if
Open-source security monitoring
- Open source SIEM
- Good features
- Self-hostable
- You want a fully free tool (Nessus requires payment)
- Your work is security monitoring-shaped, not vulnerability scanning-shaped
| Feature | Nessus | Wazuh |
|---|---|---|
| Pricing Model | Paid | Free |
| User Rating | ★4.6/5 380 reviews | ★4.5/5 63 reviews |
| Categories | Vulnerability ScanningSecurity | Security MonitoringVulnerability Scanning |
In-Depth Analysis
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
Wazuh
Open-source security monitoring
Strengths
- +Open source SIEM
- +Good features
- +Self-hostable
- +Active development
- +Free
Weaknesses
- -Complex setup
- -Learning curve
- -Resource intensive
- -Documentation gaps
- -Enterprise features paid
Key features
Pricing: Nessus vs Wazuh
| Plan | Nessus | Wazuh |
|---|---|---|
| Tier 1 | Free Essentials (Free) | Free Open Source |
| Tier 2 | $2990 Professional | Free Cloud |
| Tier 3 | $5890 Expert | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Nessus pricing and Wazuh pricing.
Who Should Use What?
On a budget?
Wazuh is free. Nessus is paid.
Go with: Wazuh
Want the highest-rated option?
Nessus: 4.6/5 (380 reviews). Wazuh: 4.5/5 (63 reviews).
Go with: Nessus
Value user reviews?
Nessus: 380 reviews (4.6/5). Wazuh: 63 reviews (4.5/5).
Go with: Nessus
3 Questions to Help You Decide
What's your budget?
Nessus is paid. Wazuh is free. Go with Wazuh if free matters most.
What's your use case?
Nessus is a vulnerability scanning tool. Wazuh is in security monitoring. Pick the category that matches your needs.
How important are ratings?
Nessus is rated higher: 4.6/5 vs 4.5/5.
Key Takeaways
Wazuh
- Completely free
- Our pick for this comparison
Nessus
- Higher user rating: 4.6/5 vs 4.5/5
- Larger review base (380 reviews)
- Better fit for vulnerability scanning
The Bottom Line
Wazuh is our pick.
Frequently Asked Questions
Is Nessus or Wazuh better?
Wazuh is rated in our evaluation. Nessus is paid and Wazuh is free.
What are Nessus and Wazuh used for?
Nessus: Vulnerability assessment scanner. Wazuh: Open-source security monitoring.
What does Nessus cost vs Wazuh?
Nessus is a paid tool. Wazuh is completely free. Visit their websites for detailed pricing.