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s5cmd vs duck: catalog facts
s5cmd	duck
Free Free and open source.	Free Free to install through package managers or installers.
Command line	Windows, macOS, Linux, Command line
Parallel execution for fast bulk transfers Works on both S3 and local filesystems	Supports FTP, SFTP, WebDAV, S3 and Swift from one tool Access to Cryptomator encrypted vaults
Command-line only, no graphical interface Focused on S3 rather than other cloud storage protocols	Command line only; use Cyberduck for a graphical interface
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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