You don't need to use a third-party integration tool, though those tools help if you want to schedule/automate the transfer of data across workspaces, especially as part of a strong enterprise-grade ecosystem.
Anaplan Connect is definitely an option (which you can also set up with a local scheduler for automation). You would just point Anaplan Connect to the Import Action, or Process Action which may be better suited for this particular case, in order to transfer the data.
Let me know if you'd like more details on any of that, hope that helps!
The link that is posted in your reply is broken and provides a not found error when clicked. Is there an updated link to documentation that could provide an overview of how to import data across Workspaces?