Open Source Python Network Scanners

NetAlertX is a network visibility and asset intelligence framework for continuous device discovery and monitoring. It is designed for homelabs, IT teams, MSPs, NOCs, and distributed environments that need a centralized view of connected assets. The platform monitors devices, detects changes, tracks unauthorized hardware, and helps maintain a source of truth for network infrastructure. It supports discovery through methods such as arp-scan, Pi-hole imports, DHCP lease imports, UniFi controller imports, and SNMP-enabled router imports. NetAlertX can send notifications through many services, connect with Home Assistant, expose API endpoints, and support custom automation through webhooks and plugins. It also supports multi-site monitoring through Sync Nodes, making it useful for remote sites, VLANs, branch offices, and segmented networks.

Zippy Ip Scanner is a free, open-source cross-platform IP scanning application written in python.

A Simple Port Scanner in Python. You need python installed on your pc before you can use the script!

VScan is a small, text-based, platform independent port scanner written in python, which supports multithreading and banner grabbing.

Zeus-Scanner is an advanced reconnaissance utility designed to simplify web application reconnaissance for security testing. It combines URL parsing, search engine querying, crawling, proxy support, and vulnerability assessment workflows in one tool. The scanner can work with multiple search engines, extract URLs from Google ban and webcache URLs, and parse robots.txt or sitemap.xml files. It also supports proxy configurations, Tor proxy compatibility, and Tor browser emulation for flexible routing during authorized assessments. Zeus-Scanner includes checks for issues such as XSS, SQL injection, clickjacking, exposed admin panels, port scanning, whois lookup, and header protection. It is most useful for penetration testers and researchers who need a broad reconnaissance toolkit, though its older Python 2-style setup makes environment compatibility important.

scanless is a Python command-line utility and library for running port scans through third-party online scanning services. It is built for users who want quick visibility into exposed ports without running a local scanner directly from their own machine. The tool can scan an IP address or domain, choose a specific supported scanner, select a random scanner, or run all available scanners. It supports services such as ipfingerprints, spiderip, standingtech, viewdns, and yougetsignal. scanless can return raw scan output as well as parsed results that include port, state, service, and protocol details. The repository is archived and no longer maintained, so it is best treated as a legacy utility for authorized testing, research, or reference use.