The best Website Monitoring alternative to Angry IP Scanner is Nmap, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Angry IP Scanner and six of them are Website Monitoring Tools so hopefully you can find a suitable replacement. Other interesting Website Monitoring Tool alternatives to Angry IP Scanner are Zenmap, Advanced Port Scanner, NetworkToolbox - Net security and NetAlertX.
Open-source utility for security auditing and network exploration, utilizing raw IP packets to scan hosts and services, identify OS and service versions, and assess network infrastructure, compatible across major operating systems with advanced GUI and tool suite.
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.
Advanced Port Scanner is a fast and free software for port scanning. It will allow you to quickly find all open ports (TCP and UDP) and detect versions of programs running on them. The utility includes many features simplifying network management.
Provides various scanning options such as WiFi Network IP scanning, Port scanning and integrates the SHODAN scan engine, Security exploit tests and more.
Network intruder and presence detector. Scans for devices connected to your network and alerts you if new and unknown devices are found.
Port Scanner Online is a user-friendly website that allows you to quickly and easily scan the ports of a target system over the internet.
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Command line is generally more flexible than GUI and in this case the ability to use CIDR notation and specify ranges is a great improvement over Angry's simple start-stop.