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Insync vs overGrive: catalog facts
Insync	overGrive
Paid Sold as paid licences, with pricing listed on the website.	Paid Commercial software; check the site for current licence terms.
Windows, macOS, Linux, Command line	Linux
Supports Google Drive, OneDrive, SharePoint and Dropbox Multiple accounts and selective or one-way sync	Two-way automatic sync between Google Drive and a local folder Selective sync of chosen Drive folders
Paid licence required Closed source	Only top-level Drive folders can be selected for sync Shared items must be added to My Drive before they sync
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account 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.