With a developer account in HubSpot, you can create an application to integrate with HubSpot. Once you’ve created your app, submit a listing to add your app to the HubSpot App Marketplace. HubSpot will review your listing and follow up via email. Please note, you must be a Super Admin to successfully update and submit the app listing for. If the submit for review button is grayed out, please check that you have filled out all required fields.
To submit an app listing for review:
Once you’ve submitted your application, HubSpot will review it and follow up by email to ask for additional information or notify you of approval.