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Head-to-head · Port Scanner Software

Masscan vs RustScan

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Masscan #7 in Port Scanner Software 8.5/10 Free plan Free plan✓ 1 of 4 features Visit Masscan
RustScan #8 in Port Scanner Software 8.4/10 Free plan Free plan✓ 2 of 4 features Visit RustScan

Masscan leads on 0 checks, RustScan 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 scoreMasscan · 8.5/10
  • Free planboth
  • Most featuresRustScan · 2 of 4

Masscan scores higher on our rubric for port scanner software: 8.5 against 8.4 out of 10; our editors rank them #7 and #8.

On scan scope, Masscan gives you Internet where RustScan offers Network.

Masscan is the better fit for high-speed internet-scale SYN scanning. RustScan is the better fit for fast Nmap-assisted network reconnaissance.

  • Masscan fits best

    High-speed internet-scale SYN scanning

  • RustScan fits best

    Fast Nmap-assisted network reconnaissance

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Side by side

Feature Masscan 8.5/10 Visit ↗ RustScan 8.4/10 Visit ↗
At a glance
Editor score 8.5 8.4
Ranking #7 in Port Scanner Software #8 in Port Scanner Software
Best for High-speed internet-scale SYN scanning Fast Nmap-assisted network reconnaissance
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Self-hosted, Desktop, Mobile
Platforms Windows, macOS, Linux Windows, macOS, Linux, Android
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market
Features Masscan 1/4 · RustScan 2/4
Service detection ✓ ✓
OS detection Not checked yet ✓ (best)
Scheduled scans Not checked yet Not checked yet
API access Not checked yet Not checked yet
Specs
Deployment Cli Cli
Scan scope Internet Network
Export formats XML, binary, grepable, JSON, list greppable text
Our review
Pros
  • Asynchronous scanning supports very large address ranges
  • Controls transmission rate and supports scan sharding
  • Exports XML, binary, grepable, JSON, and list formats
  • High-speed TCP and UDP scanning with adaptive tuning
  • Supports IPv6, CIDR ranges, files, and configurable port lists
  • Passes discovered ports to Nmap for deeper analysis
Cons
  • Command-line deployment requires comfort with terminal workflows
  • Focused on broad scanning rather than intensive host inspection
  • No AI features
  • Command-line deployment requires terminal-based workflows
  • Windows use is documented through Docker rather than native support
  • Service and OS detection depend on Nmap passthrough
Our verdict

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 →

RustScan is an open-source command-line port scanner for penetration testers, security researchers, and network administrators. It scans hosts, IP addresses, and CIDR ranges, with support for IPv6, configurable port lists and ranges,…

Read the review →
  1. MasscanPort Scanner Software 8.5Free plan
  2. RustScanPort Scanner Software 8.4Free plan

Strengths and trade-offs

  • 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

  • RustScan — where it wins

    • High-speed TCP and UDP scanning with adaptive tuning
    • Supports IPv6, CIDR ranges, files, and configurable port lists
    • Passes discovered ports to Nmap for deeper analysis

    Where it doesn't

    • Command-line deployment requires terminal-based workflows
    • Windows use is documented through Docker rather than native support
    • Service and OS detection depend on Nmap passthrough

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