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Window Switcher vs Alt-Tab Terminator: catalog facts
Window Switcher	Alt-Tab Terminator
Free Free and open source under the MIT licence.	Freemium Free version available; Pro costs $19.95 or less for a lifetime licence.
Windows	Windows
Switches between windows of the same app with one shortcut Optional app-level Alt+Tab switching	Search the list of open windows Large live previews
Windows only Configuration is by editing a file rather than a settings window	Windows only Some features require the paid Pro licence
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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