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Head-to-head · Port Scanner Software

Nmap vs Masscan

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Nmap #1 in Port Scanner Software 9.4/10 Free plan Free plan✓ 0 of 4 features Visit Nmap
Masscan #7 in Port Scanner Software 8.5/10 Free plan Free plan✓ 1 of 4 features Visit Masscan

Nmap leads on 0 checks, Masscan on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreNmap · 9.4/10
  • Free planboth
  • Most featuresMasscan · 1 of 4

Nmap scores higher on our rubric for port scanner software: 9.4 against 8.5 out of 10; our editors rank them #1 and #7.

On deployment, Masscan gives you Cli where Nmap offers Desktop.

Nmap is the better fit for broad, mature free scanning across major platforms. Masscan is the better fit for high-speed internet-scale SYN scanning.

  • Nmap fits best

    Broad, mature free scanning across major platforms

  • Masscan fits best

    High-speed internet-scale SYN scanning

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Nmap 9.4/10 Visit ↗ Masscan 8.5/10 Visit ↗
At a glance
Editor score 9.4 8.5
Ranking #1 in Port Scanner Software #7 in Port Scanner Software
Best for Broad, mature free scanning across major platforms High-speed internet-scale SYN scanning
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop, Self-hosted Desktop
Platforms Windows, macOS, Linux Windows, macOS, Linux
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Nmap 0/4 · Masscan 1/4
Service detection Not checked yet ✓ (best)
OS detection Not checked yet Not checked yet
Scheduled scans Not checked yet Not checked yet
API access Not checked yet Not checked yet
Specs
Deployment Desktop Cli
Scan scope Not checked yet Internet
Export formats Not checked yet XML, binary, grepable, JSON, list
Our review
Pros
  • Comprehensive TCP and UDP scanning with service and OS detection
  • Zenmap adds profiles, result comparison, history, and topology views
  • Free, open-source coverage across Windows, macOS, and Linux
  • Asynchronous scanning supports very large address ranges
  • Controls transmission rate and supports scan sharding
  • Exports XML, binary, grepable, JSON, and list formats
Cons
  • Primarily command-line operated, which can increase the learning curve
  • No built-in AI features
  • OEM redistribution or embedding requires a separate license
  • Command-line deployment requires comfort with terminal workflows
  • Focused on broad scanning rather than intensive host inspection
  • No AI features
Our verdict

Nmap is a free, open-source network discovery and security auditing tool for network and security professionals. It identifies hosts, open TCP and UDP ports, services and versions, operating systems, device types, and network paths. Its…

Read the review →

Masscan is a free, open-source command-line TCP port scanner for security teams, network administrators, and researchers who need to scan very large address ranges. Its core approach uses asynchronous SYN packets, with support for…

Read the review →
  1. NmapPort Scanner Software 9.4Free plan
  2. MasscanPort Scanner Software 8.5Free plan

Strengths and trade-offs

  • Nmap — where it wins

    • Comprehensive TCP and UDP scanning with service and OS detection
    • Zenmap adds profiles, result comparison, history, and topology views
    • Free, open-source coverage across Windows, macOS, and Linux

    Where it doesn't

    • Primarily command-line operated, which can increase the learning curve
    • No built-in AI features
    • OEM redistribution or embedding requires a separate license

  • Masscan — where it wins

    • Asynchronous scanning supports very large address ranges
    • Controls transmission rate and supports scan sharding
    • Exports XML, binary, grepable, JSON, and list formats

    Where it doesn't

    • Command-line deployment requires comfort with terminal workflows
    • Focused on broad scanning rather than intensive host inspection
    • No AI features

More comparisons

All port scanner software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update