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Head-to-head · Port Scanner Software

Naabu vs Masscan

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Naabu #2 in Port Scanner Software 9.1/10 Free plan Free plan✓ 2 of 4 features Visit Naabu
Masscan #7 in Port Scanner Software 8.5/10 Free plan Free plan✓ 1 of 4 features Visit Masscan

Naabu leads on 0 checks, Masscan on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreNaabu · 9.1/10
  • Free planboth
  • Most featuresNaabu · 2 of 4

Naabu scores higher on our rubric for port scanner software: 9.1 against 8.5 out of 10; our editors rank them #2 and #7.

Naabu is the better fit for internet-scale CLI scanning with integrations. Masscan is the better fit for high-speed internet-scale SYN scanning.

  • Naabu fits best

    Internet-scale CLI scanning with integrations

  • 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 Naabu 9.1/10 Visit ↗ Masscan 8.5/10 Visit ↗
At a glance
Editor score 9.1 8.5
Ranking #2 in Port Scanner Software #7 in Port Scanner Software
Best for Internet-scale CLI scanning with integrations High-speed internet-scale SYN scanning
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment 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 Naabu 2/4 · Masscan 1/4
Service detection ✓ ✓
OS detection Not checked yet Not checked yet
Scheduled scans Not checked yet Not checked yet
API access ✓ (best) Not checked yet
Specs
Deployment Cli Cli
Scan scope Internet Internet
Export formats JSON, CSV, TXT, STDOUT XML, binary, grepable, JSON, list
Our review
Pros
  • Supports SYN, CONNECT, UDP, IPv4, and IPv6 scanning
  • Combines Nmap and Shodan InternetDB with multiple target types
  • Exports JSON, CSV, TXT, and standard-output results
  • Asynchronous scanning supports very large address ranges
  • Controls transmission rate and supports scan sharding
  • Exports XML, binary, grepable, JSON, and list formats
Cons
  • Local CLI use requires command-line familiarity
  • Service-version detection requires a local Nmap installation
  • Narrower CLI focus than broader port-scanning platforms
  • Command-line deployment requires comfort with terminal workflows
  • Focused on broad scanning rather than intensive host inspection
  • No AI features
Our verdict

Naabu is an open-source command-line port scanner written in Go for security researchers, bug bounty hunters, penetration testers, and attack-surface discovery. It enumerates responsive ports across hosts, lists, CIDR ranges, ASNs, and…

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. NaabuPort Scanner Software 9.1Free plan
  2. MasscanPort Scanner Software 8.5Free plan

Strengths and trade-offs

  • Naabu — where it wins

    • Supports SYN, CONNECT, UDP, IPv4, and IPv6 scanning
    • Combines Nmap and Shodan InternetDB with multiple target types
    • Exports JSON, CSV, TXT, and standard-output results

    Where it doesn't

    • Local CLI use requires command-line familiarity
    • Service-version detection requires a local Nmap installation
    • Narrower CLI focus than broader port-scanning platforms

  • 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