If you are looking for importing and exporting of data, Salesforce dataloader will help to do that...
Please check this..
If you are looking for data import from external integration we do use Pentaho..
I hope you are not taking about Tenant on-boarding as in AR system...
Yes, It is something like I will download the excel format, answer the tables and once done import it back to remedyforce.
Very effective for the beginners that wants to import a bulk of data.
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You might also want to have a look at the following:
Both may assist you as well.