FREEDOM251

Freedom251 › Compare

Side by side

Port Scanner Software vs ZMap

Both stand on port scanner software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Port Scanner Software

Paid Windows

Port Scanner Software offers focused host and port scanning with a perpetual license. Its Windows-only desktop deployment and network licensing rules matter when planning broader use.

Visit Port Scanner Software

ZMap

Free plan LinuxMacSelf-hosted

Choose ZMap for fast, broad network measurement from a command-line environment, especially when paired with the project’s related tools. Its free Apache-licensed code and multiple probe modules support large survey workflows. Look elsewhere if you need built-in service detection or cannot operate with root privileges for simple IPv4-space scans.

Visit ZMap

The facts

Port Scanner SoftwareZMap
Free planNot publishedYes
Open sourceNot publishedNot published
Runs onWindowsLinux, Mac, Self-hosted
Lowest paid planPort Scanner Software: $19.99, paid onceNot published
Plans published1None
MakerNot publishedNot published
Websitesobolsoft.comzmap.io
On port scanner software#26 of 26#22 of 26

Port Scanner Software: what it does well

  • Scans specified hosts across port ranges
  • Identifies open and closed ports
  • License key does not expire
  • 30-day money-back guarantee
  • Direct Windows installer download

What to know first

  • Windows desktop only
  • Network users need individual licenses
  • EULA disclaims warranties
  • No third-party integrations listed

ZMap: what it does well

  • Free and open source under Apache License 2.0
  • Scans one IPv4 port in under 45 minutes on typical gigabit hardware
  • Supports TCP SYN, ICMP, DNS, UPnP, BACNET, and UDP probes
  • Works with ZGrab for stateful service measurements
  • Exports CSV, JSON, and plain-text results

What to know first

  • A simple IPv4-space scan requires root privileges
  • ZMap itself does not provide service detection
  • Internet-wide scans carry ethical and operational implications

Alternatives to Port Scanner Software Alternatives to ZMap The whole list