Please note: when bulk resyncing company/account field mappings, HubSpot cannot sync more than 200,000 companies at the same time. This can result in a We couldn't sync all your updates for this mapping error.
A Salesforce account does not require an associated contact to create a company in HubSpot.
How HubSpot companies sync to Salesforce
When a company is created in HubSpot, the integration will automatically create a Salesforce account if any of the following criteria is met: