Abstract: Various embodiments concern custom adapters for Salesforce platforms that enable synchronization with an external service, such as Google Sheets. More specifically, the custom adapters can be used to read external data from a database associated with the external service, and then continually reference the external data in order to provide a live view of the external data from a Salesforce interface. Thus, the custom adapters enable real-time, live data integration without data replication. The custom adapters also allow the external data to be dynamically mapped to data object(s) that are used to create the Salesforce interface. Therefore, a user may be able to modify the external data using the Salesforce interface and an interface associated with the external service.