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s4cmd vs s5cmd: catalog facts
s4cmd	s5cmd
Free Free and open source under the Apache-2.0 license.	Free Free and open source.
Command line	Command line
Transfers and synchronizes files with S3 storage Supports multipart operations and batch deletion	Parallel execution for fast bulk transfers Works on both S3 and local filesystems
Requires Python and boto3 Designed for S3-compatible object storage	Command-line only, no graphical interface Focused on S3 rather than other cloud storage protocols
Downloadable app	Downloadable app
Open source	Open source
License: Apache-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 October 8, 2026	Official website Full listing and sources Checked September 24, 2026

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