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crabz vs LZ4: catalog facts
crabz	LZ4
Free Free and open source, dual-licensed under MIT and the Unlicense.	Free Free and open source.
macOS, Linux, Command line	Windows, macOS, Linux, Command line
Multi-threaded compression in the style of pigz Supports Gzip, Zlib, BGZF, Mgzip, raw Deflate and Snap	Very fast compression and decompression Scales across CPU cores
Described by its author as a proof of concept Handles single streams, not archive formats like ZIP or 7z	Lower compression ratio than zstd or xz Compresses single files or streams, not a full archiver
Downloadable app	Downloadable app
Open source	Open source
License: MIT OR Unlicense	License: BSD-2-Clause (library), GPL-2.0 (command-line tool)
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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