Kitsmith / Utilities / Cyberduck
A free, open-source (GPL) file transfer client for FTP, SFTP, WebDAV, S3, and most major cloud storage providers — from iterate GmbH.
Our take
A long-running, broad-protocol alternative to a dedicated sync client: it connects to FTP, SFTP, WebDAV, S3, Azure, Backblaze B2, Google Cloud Storage, Google Drive, OneDrive, Dropbox, Box, and several enterprise file-sharing platforms through one Finder-like browser window, plus optional Cryptomator client-side encryption for any of them. It’s a browse-and-transfer tool rather than continuous background sync — closer to an FTP client with cloud support bolted on than to Dropbox. Free and GPL-licensed, maintained on GitHub by iterate GmbH, a Swiss software company that also makes the paid Mountain Duck (mounts the same services as a local disk) and Cyberduck CLI.
- Price
- Free
- License
- Open source
- Requires
- No specific minimum macOS version is published on the project site.
- Get it via
- Homebrew · Direct · Mac App Store
- Developer
- iterate GmbH
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Who made this
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What it does
Broad protocol and cloud support
FTP, SFTP, WebDAV, S3, Azure, Backblaze B2, Google Cloud Storage/Drive, OneDrive, Dropbox, Box, and Nextcloud/ownCloud, among others.
Cryptomator integration
Client-side encrypted vaults that work on top of any connected server or cloud storage.
Finder-style browsing
Quick Look previews, drag-and-drop transfers, and bookmarks organized like the macOS Finder.
The deal
- Free, open source (GPL license)
- No account or subscription required
- Sibling products (Mountain Duck, Cyberduck CLI) from the same company are paid separately
Worth knowing: Cyberduck browses and transfers files on demand rather than continuously syncing folders in the background — for always-on two-way sync, it is not a like-for-like Dropbox replacement.
Cyberduck — questions people ask
Is Cyberduck free?
Yes — free and open source under the GPL license, with no paid tier.
Does Cyberduck sync files continuously in the background?
No — it’s a browse-and-transfer client, not a continuous background sync tool. The same company’s paid Mountain Duck mounts cloud storage as a local disk instead.
Who makes Cyberduck?
iterate GmbH, a Swiss software company that also makes Mountain Duck and Cyberduck CLI.
Is Cyberduck free?
Yes — Cyberduck is free.
Does Cyberduck work alongside a notch app like Alcove?
Yes — Cyberduck lives in the screen, so it runs happily alongside any Dynamic Island hub or notch app.
Where can I download Cyberduck?
Cyberduck is available via Homebrew, Direct, Mac App Store.
Is Cyberduck open source?
Yes — Cyberduck is open source.
Reviews
No public ratings yet. Reader reviews are coming to Kitsmith soon.
Listing hand-verified September 18, 2026 from the developer's site and public sources.
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