This module integrates with multiple parts of drupal uning submodules such as Webform and the HubSpot API to submit Data directly to HubSpot's lead management system.
For example, a Webform-based contact form on your site can send its data to HubSpot, where you may already track potential clients and contacts; or a Webform-based e-newsletter signup could send the lead to HubSpot's targeted marketing system, letting you use your pre-existing email campaigns.