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Mountain Duck vs Callback Drive for SFTP Servers: catalog facts
Mountain Duck	Callback Drive for SFTP Servers
Paid A paid licence is required after the trial.	Paid Commercial software with a free trial.
Windows, macOS	Windows, Linux, Command line
Remote storage behaves like a local drive in any application Reads and writes Cryptomator vaults for client-side encryption	Remote SFTP files appear as a normal drive Imports settings from PuTTY or FileZilla
Paid licence per user Performance depends heavily on the remote back end and connection	Paid after the trial No macOS version mentioned on the current product page
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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 September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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