The best free alternative to inSSIDer is Kismet, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to inSSIDer and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to inSSIDer are Homedale, Vistumbler, WiFi Analyzer - VREM and Wi-Fi Info.
Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and (with appropriate hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic.
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With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength. Use the detected access points with Google Geolocation and Mozilla Location Service to locate yourself.
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![See an overview of all available access points with their signal strength, encryption [WEP/WPA/WPA2], speed and channel.](https://img.alternativeto.net/s/309x197/jpeg/8f3b1d9c-e2be-e311-8c57-002590a05f5f_2_full.png)
Vistumbler is a wireless network scanner and mapping utility designed for Windows Vista and above
Optimize your WiFi network using WiFi Analyzer by examining surrounding WiFi networks, measuring their signal strength as well as identifying crowded channels.
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Powerful network toolset packed into an Android app. Gathers and displays the information about the Wi-Fi network environment!.
WiFi Monitor is a powerful tool that allows you to analyze the state of Wi-Fi networks and gather data about its parameters (signal strength, frequency, connection speed, etc). Useful for setting up a router and checking devices connected to WLAN.
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How strong is your WiFi signal? You can use the NETGEAR WiFi Analytics app to get advanced analytics that help you optimize your existing or newly extended WiFi network.
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netsniff-ng is a free, performant Linux networking toolkit. The gain of performance is reached by zero-copy mechanisms, so that on packet reception and transmission the kernel does not need to copy packets from kernel space to user space and vice versa.
NetStumbler is a tool for Windows that allows you to detect Wireless Local Area Networks (WLANs) using 802.11b, 802.11a and 802.11g. It has many uses:Verify that your network is set up the way you intended, find locations with poor coverage in your WLAN, detect other networks...
The Xirrus Wi-Fi Inspector is a powerful tool for managing and troubleshooting the Wi-Fi on a Windows XP SP2 or later, Vista, or 7 laptop. Built in tests enable you to characterize the integrity and performance of your Wi-Fi connection. Applications include:
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LinSSID is graphically and functionally similar to iwscanner (Linux) and Inssider (Microsoft™ Windows®). It is written entirely in C++ using Linux wireless tools and Qt4.
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![See an overview of all available access points with their signal strength, encryption [WEP/WPA/WPA2], speed and channel.](https://img.alternativeto.net/s/618x394/avif/8f3b1d9c-e2be-e311-8c57-002590a05f5f_2_full.png)
