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btdu vs gdu: catalog facts
btdu	gdu
Free Free to download from its public GitHub repository.	Free The open-source application is available without a license fee.
Linux, Command line	Windows, macOS, Linux
Accounts for snapshots and shared extents Sampling gives quick results on large volumes	Interactive size inspection with parallel scans
Works only on Btrfs Results are estimates that sharpen as sampling continues	Parallel scanning offers less benefit on mechanical disks.
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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