Nmap vs Qualys
A detailed comparison to help you choose between Nmap and Qualys.
Nmap Network discovery and security auditing tool. | Qualys Cloud-based vulnerability management and compliance. | |
|---|---|---|
| Rating | 4.8 (79 reviews) | 4.4 (162 reviews) |
| Pricing Model | free | paid |
| Starting Price | Free | From $0/mo |
| Best For | Best for users seeking privacy and security tools | Best for users seeking privacy and security tools |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | — | — |
Nmap
Pros
- + Multiple scan techniques, including SYN and connect
- + NSE Lua scripts for discovery and vulnerability checks
- + Service/version detection and OS fingerprinting
- + Cross-platform: Windows, macOS, Linux
- + Free for end users under NPSL
Cons
- - NPSL restricts proprietary redistribution without OEM license
- - Some NSE scripts are dangerous if misused
- - Windows features may require Npcap separately
- - Aggressive scans are noisy and easily detected
Qualys
Pros
- + Multiple sensor types: scanners, agents, passive sensors
- + Agent-based continuous scanning workflow
- + External scanning via Qualys-hosted Internet Scanner option
- + Authenticated web app scanning with Selenium script replay
- + Modular platform: VMDR, patch, monitoring apps
Cons
- - Pricing is quote-based and module-dependent
- - Not open-source; limited transparency into internals
- - Setup complexity: sensors, scoping, authentication tuning
- - Not designed for consumer privacy or anonymity
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