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, NetPeek, Port Authority and NETworkManager by BornToBeRoot.
Open-source, cross-platform network scanner for fast and simple IP and port scanning. It's lightweight, requires no installation, utilizes multithreading for speed, and is extendable via plugins. It pings IPs, resolves hostnames, determines MAC addresses, provides NetBIOS info, and saves results in various formats.
Estonia
EU
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.
United States
Android-focused port scanner quickly discovers hosts and delivers comprehensive network data. Displays local and remote device info, enabling detailed analysis for systems security.
United States
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...
GermanyEU
KillerScan sweeps a network and tells you what is on it: routers, printers, cameras, servers and workstations, not a list of IP addresses.
United States
Network intruder and presence detector. Scans for devices connected to your network and alerts you if new and unknown devices are found.
This is the fastest Internet port scanner. It can scan the entire Internet in under 6 minutes, transmitting 10 million packets per second.
United States
ZMap is a fast single packet network scanner designed for Internet-wide network surveys. On a typical desktop computer with a gigabit Ethernet connection, ZMap is capable scanning the entire public IPv4 address space in under 45 minutes.
United States
Umit: The Nmap Frontend: Umit was designed to accomodate and run more than one scan at time. Each scan is executed and shown inside a Scan Tab, which has a title and organize every information obtained in the scan result.
The Scan Tab tries to facilitate your life, by making th.
Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.
