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inSSIDer vs Vistumbler: catalog facts
inSSIDer	Vistumbler
Freemium Free with an Oscium account. Advanced features require a paid subscription.	Free Free and open source under the GPLv2.
Windows, macOS	Windows
Makes channel overlap and interference immediately obvious Client-level inspection of a chosen access point	GPS logging to map where access points were found KML and GPX export plus live Google Earth tracking
Requires a free account to use at all Advanced features need the paid MetaGeek Plus subscription	Windows only Works best when disconnected from access points while scanning
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.