The HubSpot Connect Integrations Program provides a simple one-time connect opportunity either for a one-time data transfer or an ongoing sync.The effort required includes studying documentation, understanding business logic, execution, testing, and maintenance. The category of applications to be integrated, range from marketing / sales to productivity. Most of the times, this integration is as simple as logging into your mobile application using a Facebook Login.
Not every application is available for integration via HubSpot Connect. In such cases, custom development effort is required to integrate HubSpot with the connecting application. API availability is critical to the success of such integrations