Flatly is a software-as-a-service that lets people automatically extract, transform and load their business data into spreadsheet files (called "flat files" or "flat file databases"). https://flatly.io
Popular Business Intelligence apps like PowerBI and Google Data Studio can read data natively and directly from flat files.
Flatly provides the service as an easy-to-use, do-it-yourself web app designed for small and medium businesses.
Popular use cases are:
Custom analytics and dashboards
Secure read-access data sharing to peers