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Zstandard vs ouch: catalog facts
Zstandard	ouch
Free Free and open source, dual licensed BSD or GPLv2.	Free The software is free under its open-source licence. Hosting, hardware and external…
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Compression close to zlib's ratio at several times the speed, and much faster decompression The format is standardised in RFC 8878 with multiple independent implementations	One command handles tar, zip, gzip, bzip, xz, zstand and more, picking the format from the file name…
A command-line tool with no graphical interface of its own Maximum ratio is below xz or 7z at their slowest settings, which is the trade it makes on…	It wraps the common formats rather than replacing specialist tools, and it has no interface beyond the terminal.
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	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 September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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