To use multiple connections for file transfers with Cyberduck CLI, use the -parallel option. FileZilla can be a struggle to use at times, but it does indeed work. Unless you have specialized needs or strongly held preferences, you’re best avoiding FileZilla and sticking with Cyberduck.

This feature is currently experimental and can be enabled manually. Advantages to Cyberduck: Cyberduck is easier to use, has a polished interface and fits in nicely with the Mac experience. This will split a download into multiple segments for concurrent transfer and assemble the file when complete. We have also worked on improving throughput for downloads with segmenting single large files into parts. In the question What are the best FTP clients for OS X Cyberduck is ranked 2nd while FileZilla is ranked 3rd. Additionally large single file uploads to OpenStack Swift (2GB threshold) and Amazon S3 (100MB threshold) will use multiple connections and upload the file in segments. When comparing FileZilla vs Cyberduck, the Slant community recommends Cyberduck for most people. WinSCP is ranked 1st while Cyberduck is ranked 3rd. In the question What are the best FTP clients for Windows. This feature is supported for all connection protocols for downloads & uploads. When comparing Cyberduck vs WinSCP, the Slant community recommends WinSCP for most people. The maximum number of connections to open is limited with the control in the lower right of the Transfers window. Enable Multiple Connections per default in Preferences → Transfers or when per bookmark. When there are many small files this can double or triple transfer speeds because of the parallel execution. Version 4.7 of Cyberduck brings support to use multiple connections for downloads and uploads.

Filezilla vs cyberduck parallel sftp