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S3Drive vs Zimly: S3 Backup: catalog facts
S3Drive	Zimly: S3 Backup
Freemium Paid storage plans are offered, and the app can also be pointed at your own S3 or Rclone…	Free Free and open source under GPL-3.0-only.
Linux, Android, iOS, Web	Android
Client-side encryption compatible with Rclone Works with any S3 provider or self-hosted MinIO and Ceph	Works with any S3-compatible storage Supports self-hosted MinIO and AWS S3
Proprietary client Bringing your own storage means managing a separate provider account	Requires your own S3 storage and credentials Android only
Downloadable app, Web application, Hosted service	Downloadable app
Closed source	Open source
License: Proprietary	License: GPL-3.0-only
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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