You can turn on the option for HubSpot to automatically associate contacts with companies by matching the domain in a contact's Email value to the company's Company domain name value. For example, a contact with the email address "sandra@example.com" will be associated to the company with the Company domain name "example.com."
With the setting turned on:
Additionally, HubSpot AI will automatically associate recorded calls to the primary company associated with the call’s participants. Learn how to turn this off in your calling settings.
In the left sidebar menu, navigate to Objects > Companies.
In the Automation section, select the Create and associate companies with contacts checkbox.
In the dialog box, choose whether or not to allow HubSpot to create new company records and associations based on your existing contacts' email addresses:
Click Yes to retroactively create company records and associate existing contacts based on their email addresses. Both existing and new contacts will be automatically associated with companies based on their email address.
You can exclude up to 1000 domains from automatic association.
In the left sidebar menu, navigate to Objects > Companies.
Under the Create and associate contacts and companies checkbox, click Exclude a domain out of automatic association.
Please note: if you remove a domain from the Opted out domains list and want it to be automatically associated moving forward, you will need to turn off automatic association and turn it back on by clearing and reselecting the Create and associate companies with contacts checkbox.