Compare software

s5cmd vs s4cmd: catalog facts
s5cmd	s4cmd
Free Free and open source.	Free Free and open source under the Apache-2.0 license.
Command line	Command line
Parallel execution for fast bulk transfers Works on both S3 and local filesystems	Transfers and synchronizes files with S3 storage Supports multipart operations and batch deletion
Command-line only, no graphical interface Focused on S3 rather than other cloud storage protocols	Requires Python and boto3 Designed for S3-compatible object storage
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
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 September 24, 2026	Official website Full listing and sources Checked October 8, 2026

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