Automatically Add and Update Customer Details to Hubspot

Hi there, 

I've just added Squarespace Commerce to a client's site so they can sell tickets for an event. Each time a customer makes a purchase, they would like the customer's details to be added (or updated if an existing customer) to their existing CRM; which is Hubspot. 

They have previously done this with their old ticketing system using Zapier (which they pay a subscription for). Is this possible? The only Zaps I can find on Zapier trigger when a customer fills in a form, there isn't anything related to making a sale that I can find.

Is there a workaround?

Thanks in advance.