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FolderSync vs ArchiveKeep: catalog facts
FolderSync	ArchiveKeep
Freemium The Android app is free; the desktop app has a 14-day trial.	Free Free and open source.
Windows, macOS, Linux, Android	Android
Supports more than 20 cloud providers Also syncs with SMB and SFTP targets	Replicates an archive across multiple storages Open source and actively developed
Desktop version is paid after a 14-day trial Proprietary software	Early release with possible undiscovered bugs Small project with limited documentation in the research
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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 23, 2026	Official website Full listing and sources Checked October 2, 2026

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