Formstack Sync officially supports integration with the HubSpot platform. To add HubSpot to your Sync integration, follow the steps below:
1. Access your Sync portal and navigate to the Connectors overview
2. Select HubSpot from the "Install a new connector" drop-down field
3. Sign In to Authenticate the HubSpot Connector
Selecting Sign In to HubSpot will bring you to the HubSpot Login seen below:
From here, Grant Access for Formstack Sync.
Then Save the Connector and you are all set!!