If you use a third-party integration, where does support for that integration come from?

In the HubSpot Data Integration certification, support for a third-party integration strictly comes from the third-party company that developed and listed the app in the HubSpot App Marketplace. While HubSpot maintains the platform and provides the APIs that the integration uses, the third-party developer is responsible for the code, maintenance, and troubleshooting of their specific connection. This distinction is a core part of the HubSpot Ecosystem policy: the marketplace requirements mandate that every app provider must supply their own setup documentation and at least one direct support contact method (such as an email address or help desk) to assist users with integration-specific bugs or sync errors.