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overGrive vs Insync: catalog facts
overGrive	Insync
Paid Commercial software; check the site for current licence terms.	Paid Sold as paid licences, with pricing listed on the website.
Linux	Windows, macOS, Linux, Command line
Two-way automatic sync between Google Drive and a local folder Selective sync of chosen Drive folders	Supports Google Drive, OneDrive, SharePoint and Dropbox Multiple accounts and selective or one-way sync
Only top-level Drive folders can be selected for sync Shared items must be added to My Drive before they sync	Paid licence required Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account 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 2, 2026	Official website Full listing and sources Checked September 23, 2026

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