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 50 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, sn0int and MASSCAN.

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.

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Nmap

277

Free • Open Source
Network Monitor

Mac
Windows
Linux
BSD

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

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Angry IP Scanner
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Free • Open Source
Network Monitor
IP Scanner
Mac
Windows
Linux
Java
49 alternatives to Angry IP Scanner
Open-source and cross-platform network scanner designed to be fast and simple to use.

Angry IP Scanner has no features, suggest some!

Angry IP Scanner vs Nmap opinions
Almost everyone thinks Angry IP Scanner is a great alternative to Nmap.
Zenmap
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No
Free • Open Source
Network Monitor
Mac
Windows
Linux
38 alternatives to Zenmap
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.
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Zenmap Features
Connectivity Testing
Graphical User Interface
Asynchronous
Zenmap vs Nmap opinions
Almost everyone thinks Zenmap is a great alternative to Nmap.
Port Authority
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Yes
No
Free • Open Source
Android
45 alternatives to Port Authority
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.
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Port Authority Features
1. Wake on LANPort Authority can switch on your offline remote computers through the local network from anywhere.
Network Discovery
sn0int
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Yes
No
Free • Open Source
Network Monitor
Mac
Windows
Linux
BSD
19 alternatives to sn0int
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. sn0int is enumerating attack surface by semi-automatically processing public information and...
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sn0int Features
Network Discovery
Data Mining
Information gathering
OSINT
MASSCAN
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Yes
No
Free • Open Source
IP Scanner
Mac
Windows
Linux
BSD
21 alternatives to MASSCAN
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.
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MASSCAN Features
Network Scanner
Network Discovery
WinMTR
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No
Free • Open Source
Windows
PortableApps.com
28 alternatives to WinMTR
Free Network Diagnostic Tool. WinMTR is an equivalent of mtr for Windows.
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WinMTR Features
1. PortableWinMTR can be used from a USB stick or similar with no prior installation.
Traceroute with hop monitoring
Trace Route
Network Tools
Continuous Ping
Discontinued
The program is no longer updated. Last version, 0.92, released in February 2011, can be still downloaded from the official website.
netdiscover
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No
Free • Open Source
Linux
49 alternatives to netdiscover
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.

netdiscover has no features, suggest some!
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NETworkManager by BornToBeRoot
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Yes
No
Free • Open Source
Network Monitor
IP Scanner
Windows
49 alternatives to NETworkManager by BornToBeRoot
NETworkManager is a powerful tool for managing networks and troubleshoot network problems! It includes a variety of tools such as an IP scanner, Port Scanner, Ping Monitor, WiFi analyzer, PuTTY/RemoteDesktop with tabs or an LLDP/CDP capture (and many more) in a unified user...
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NETworkManager by BornToBeRoot Features
1. PortableNETworkManager by BornToBeRoot can be used from a USB stick or similar with no prior installation.
2. Wake on LANNETworkManager by BornToBeRoot can switch on your offline remote computers through the local network from anywhere.
Swiss-army knife tool
Trace Route
RDP
VNC Support
SSH
VNC Viewer
Vernet
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Yes
No
Free • Open Source
Network Monitor
Network Analyzer
Mac
Linux
Android
iPhone
F-Droid
47 alternatives to Vernet
Vernet - Network Analyzer and Monitoring Tool.
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Vernet Features
1. LightweightVernet consumes less device resources compared to similar apps.
skipfish
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Yes
No
Free • Open Source
Vulnerability Scanner
Mac
Windows
Linux
BSD
29 alternatives to skipfish
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.
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skipfish Features
1. Command line interfaceskipfish either have CLI support or is a CLI-only app.
Heuristic Detection
Discontinued
Skipfish is no longer maintained. Last version, 2.10 beta, released in December 2012, can be still downloaded from Google Code Archive