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s4cmd vs Shuk: catalog facts
s4cmd	Shuk
Free Free and open source under the Apache-2.0 license.	Free Free to use; it requires access to an Amazon S3 bucket.
Command line	Command line
Transfers and synchronizes files with S3 storage Supports multipart operations and batch deletion	Uploads files directly from the command line Creates pre-signed URLs for sharing
Requires Python and boto3 Designed for S3-compatible object storage	Requires an Amazon S3 bucket
Downloadable app	Downloadable app
Open source	Closed 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 October 8, 2026

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