Top 30 Open-Source IT Discovery Software with Real-Time Network Mapping

Industry‑standard network scanner that discovers hosts, services, OS fingerprints and can export results for visualisation.

Official GUI for Nmap with built‑in topology visualisation and real‑time scan progress monitoring.

Enterprise‑grade network management platform with automatic discovery, performance monitoring and a dynamic network map view.

Full‑featured monitoring suite that includes auto‑discovery rules and a real‑time network topology map with drill‑down capabilities.

Community‑driven network monitoring system offering auto‑discovery, device‑level alerts and an interactive network map widget.

IP address management (IPAM) and data‑center infrastructure management (DCIM) tool that builds a live topology from discovered devices.

Web‑based network discovery and management application that maps layer‑2 topology using SNMP and CDP/LLDP.

Monitoring engine with powerful discovery modules and a real‑time network map add‑on (Icinga Web 2).

Open‑source monitoring core; when paired with the Nagios XI/QL map plugins it provides live network topology visualisation.

Metrics collection (Prometheus) paired with Grafana dashboards; the Grafana Network Map plugin renders real‑time topology from scraped data.

Network monitoring platform with auto‑discovery and a built‑in interactive topology map for supported devices.

Graphing solution that can auto‑discover devices via SNMP and display a live network map through the Cacti Network Map plugin.

Unified monitoring system offering automatic discovery, asset inventory and a dynamic network topology view.

Open‑source IP address management tool that integrates with discovery scripts to visualise live network segments.

Data‑center asset management solution with network discovery extensions and a real‑time rack‑level topology map.

Automation engine that can generate an up‑to‑date inventory of network devices; combined with Ansible‑Playbooks it can feed live maps.

Configuration management system with built‑in network discovery (salt‑ssh) and real‑time state visualisation via the Salt UI.

Log management platform; when paired with the Graylog Network Map plugin it visualises live connections derived from log data.

SDN controller that discovers network topology via southbound protocols (OpenFlow, NETCONF) and presents a live map via its UI.

Network emulation suite that can import real device configurations and display a live, interactive topology diagram.

Packet capture tool with a real‑time network graph (IO Graph) that visualises live traffic flows and host relationships.

High‑performance traffic probe that provides a real‑time network map based on flow data (NetFlow/sFlow).

IDS/IPS engine that can output JSON alerts; when combined with the EveBox UI it shows a live topology of communicating hosts.

Networking component of OpenStack; provides API‑driven discovery of virtual networks and a Horizon dashboard map view.

Wireless network detector, sniffer and intrusion detection system that builds a live map of Wi‑Fi devices and APs.

Powerful interactive packet manipulation program; can be scripted to discover hosts and render a live topology with external tools.

Vulnerability scanner that performs network discovery and can export results for visualisation in tools like Grafana.

Ultra‑fast port scanner; its output can be piped into visualization tools (e.g., Nmap‑XML → Zenmap) for real‑time mapping.

Network scanner designed for Internet‑scale surveys; integrates with ZGrab for service discovery and live topology dashboards.

Free version of Lansweeper that performs automatic network discovery and offers a web‑based real‑time topology map.

Network documentation system with auto‑discovery via SNMP and a dynamic network diagram view.

Free, community‑supported monitoring tool that discovers devices and provides a live network map in its dashboard.

Open‑source network detection and response platform that continuously discovers assets and visualises them on a live map.

While not fully open‑source, community builds exist; it auto‑discovers Mikrotik and other devices and shows a live topology.

Free edition provides automatic discovery and a live network map for small‑to‑medium environments.

A collection of ready‑made Zabbix templates that enhance auto‑discovery and produce real‑time topology maps.

Grafana plugin that consumes data from Prometheus, InfluxDB or Zabbix to render an interactive, real‑time network topology.