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Open Source Nmap Alternatives

The best open source alternative to Nmap is Angry IP Scanner. If that doesn't suit you, our users have ranked more than 25 alternatives to Nmap and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Nmap are Zenmap, Port Authority, MASSCAN and sn0int.

Nmap alternatives are mainly Network Monitors but may also be IP Scanners or Network Analyzers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Nmap.
This page was last updated Jul 3, 2022
Nmap
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  • FreeOpen Source
  • Mac
  • Windows
  • Linux
  • BSD

Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing.

Learn more about Nmap

  1. Angry IP Scanner

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Java

    Open-source and cross-platform network scanner designed to be fast and simple to use.

    Almost everyone thinks Angry IP Scanner is a great alternative to Nmap.
  2. Zenmap

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    Zenmap is the official cross-platform GUI for the Nmap Security Scanner. It is free and runs on Linux, Windows, Mac OS X, etc. Zenmap aims to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users.

    Almost everyone thinks Zenmap is a great alternative to Nmap.


  3. Port Authority

    • FreeOpen Source
    • Android

    A handy systems and security-focused tool, Port Authority is a very fast Android port scanner. Port Authority also allows you to quickly discover hosts on your network and will display useful network information about your device and other hosts.

  4. MASSCAN

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD

    MASSCAN produces results similar to Nmap , the most famous port scanner. Internally, it operates more like scanrand, unicornscan, and ZMap, using asynchronous transmission. The major difference is that it's faster than these other scanners.

  5. sn0int

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD

    sn0int is a semi-automatic OSINT framework and package manager. It was built for IT security professionals and bug hunters to gather intelligence about a given target or about yourself.

    No screenshots yet


  6. WinMTR

    • FreeOpen Source
    • Windows
    • PortableApps.com

    Free Network Diagnostic Tool. WinMTR is an equivalent of mtr for Windows.

    Discontinued

    The program is no longer updated. Last version, 0.92, released in February 2011, can be still downloaded from the official website.

  7. NETworkManager by BornToBeRoot

    • FreeOpen Source
    • Windows

    NETworkManager is a powerful tool for managing networks and troubleshoot network problems!

  8. netdiscover

    • FreeOpen Source
    • Linux

    Netdiscover is an active/passive address reconnaissance tool, mainly developed for those wireless networks without dhcp server, when you are wardriving. It can be also used on hub/switched networks.

    No screenshots yet
  9. skipfish

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD

    A fully automated, active web application security reconnaissance tool. Key features: High speed: pure C code, highly optimized HTTP handling, minimal CPU footprint - easily achieving 2000 requests per second with responsive targets.

    Discontinued

    Skipfish is no longer maintained. Last version, 2.10 beta, released in December 2012, can be still downloaded from Google Code Archive

  10. Scapy

    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    Scapy is a powerful interactive packet manipulation program. It is able to forge or decode packets of a wide number of protocols, send them on the wire, capture them, match requests and replies, and much more.

Showing 10 of 20 alternatives