Cyberduck supports transfers between servers regardless of the protocol by simply opening two browser windows connected to different hosts and drag file and folders between.
With Cyberduck CLI, there is now also the option to automate such tasks with a script running on Mac, Windows or Linux to keep a current copy of files on a different host for failsafe access. Use the
--copy option to do the same but allowing you to automate the task. Consider you want to copy files from Amazon S3 to Rackspace CloudFiles running OpenStack Swift, all you need is the command
duck --copy s3://<Access Key ID>@<bucket>/ rackspace://<Username>@<container>/
to copy all files. Use the
--existing compare option for subsequent invocations to only transfer new and changed files.