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Filelight vs FolderSizes: catalog facts
Filelight	FolderSizes
Free Free and open source under the GPL.	Freemium Free version available, with a paid Pro upgrade.
Windows, Linux	Windows
The ring chart makes the biggest space consumers immediately obvious Scans remote and network locations as well as local disks	Analyses network shares as well as local drives Scheduled reports with email delivery
Pulls in KDE libraries on non-KDE desktops	Windows only Some features require the paid Pro edition
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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