How to back up Simpplr data?

All Simpplr data is stored in Custom Objects in Salesforce, so it should also be getting backed up with other Salesforce data.
 
You can manually create or schedule backup of Simpplr Custom Objects in Salesforce. Go to Salesforce Setup -> Data Export and back up all objects that having "Simpplr" in the object name.

Backup can be schedule on weekly or monthly basis.

You can also have full copy sandbox, which can be refreshed every 30 days.