Cyberduck Mountain Duck CLI

Smart Synchronization

Ignored Online Selective Sync Sync in Progress On Demand Sync

Version 3

View all files on your remote storage regardless if synced to your computer. Files are synchronized to your local disk when opened to allow offline usage.

Work Offline

Select files and folders to always keep offline on your computer. Other files are downloaded and cached on demand only and otherwise do not take space on your local disk.

Sync Progress

Changes are uploaded in the background as soon as a connection is available.


Transparent client-side encryption using Cryptomator interoperable vaults. Encryption for data at rest prevents unauthorized access regardless of the server or cloud storage infrastructure.

Cryptomator Vaults


Unobtrusive Interface

Runs in the status bar on macOS or the system tray on Windows.


Notification badge when a file is added or updated on the server.

File Updated Notification

Context Menu

Context Menu in File Explorer with sharing and sync options.

Context Menu in

Fully Integrated in Finder and Explorer

Info Panel

Open the Info panel using right-click on a file to set server side metadata, permissions, ACLs and more. Includes advanced settings for Amazon S3 and Amazon CloudFront. Read more.


Create links for others that auto expire with Amazon S3, Microsoft Azure, Backblaze B2 and others. Mountain Duck also supports creating shares in Dropbox, Google Drive and NextCloud & ownCloud deployments. Read more.

Finder Context Menu

Feature & Performance Comparison

We have run set of performance and reliability tests which show our dedication to make Mountain Duck the best available option to mount server and cloud storage as a disk on your desktop.

Compare with Transmit Disk, ExpanDrive & CloudMounter


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We have had a long private beta period with intensive testing to make Mountain Duck work well and fast. This is what our private beta testers have been saying.

This weekend I accidentally stumbled on mounting my entire vagrant disk over FTP using Mountain Duck and it’s been jaw-dropping amazing.

Michael Weigle

Thanks so much for the application! It’s really brilliant, definitely will make web development much simpler!

Bobby Dilley

Thanks works like a charm so far!

Bram Hilgersom

All I can say is - it works and I love it, it is simple, small, unobtrusive and hassle-free.

Rok Lipnik

Ever since I started using the Mountain Duck application I have loved it.

William Andersen Jr.

The reliability and stability of the transfers keeps getting better and better. With high-speed home internet, remove storage such as Wasabi, Google Drive, etc. makes total sense. Mountain Duck allows those to appear as reliable local storage.

Michael Thwaite

Many thanks, this is a great application. The integration with the finder makes working with FTP servers a lot more seamless. I love it!

Christian Von Alten

I've been using Mountain Duck without issues for weeks now. It's massively useful.

Jason Efstathiou

You have created a great tool. I use it every day and I cannot put into words how much this has helped me with my day-to-day tasks.

Jerry Essler

For those looking to mount an IaaS virtual drive, network-drive software works best, with Mountain Duck being our top pick.

I've been using Mountain Duck without issues for weeks now. It's massively useful.

Jason Efstathiou