We have a lot of Contacts marked as duplicates in Hubspot. But when we look at the details it seems that these Contacts are duplicates with Salesforce … Accounts! Indeed we are also using email field in our SFDC Account object. Most of them are emails like info@mydomain.com.
But if Hubspot Contacts use the same email address the sync is interupted and these records are marked as duplicates.
HubSpot deduplicates Salesforce accounts to HubSpot companies based on their associated Salesforce Account ID. When two contacts are syncing between HubSpot and Salesforce, if the Salesforce contact is associated with a Salesforce account, that account will either deduplicate with the HubSpot company that the Salesforce contact in HubSpot is associated with or it will create a new HubSpot company.