The content of Orderly databases is stored as a custom content object in Confluence. This means that all the data is stored by Atlassian.
The only data we store on our side is the metadata required to have the app installed on your Confluence instance, e.g., the base URL.
Besides, Orderly mostly processes the contents of your Orderly databases directly in the browser. But partly also in our backend, which runs on AWS. For example, when a database references entities outside the database, the information that is displayed in the database (the page title, but not the page content) is processed by Orderly.
Find more information on how we process data at K15t and in our apps in our Data Processing Addendum.