Direct Answer:

Using HubSpot for CRM and Mailchimp for email marketing is a common stack but keeping them in sync can be a headache. Native integrations sometimes sync all contacts when you only want specific segments. This lack of control can lead to inflated billing in Mailchimp and cluttered lists.

Webhooks by Zapier gives you precise control over this sync. You can configure a HubSpot workflow to send a webhook only when a contact meets specific criteria (e.g. "Newsletter Opt-In = True"). Zapier catches this webhook and uses the Mailchimp "Add/Update Subscriber" action to push the data. This allows you to selectively sync contacts ensuring your email lists are clean and targeted.

How this automation works

• Trigger: The Catch Hook trigger receives the contact data from the HubSpot workflow.
• Action: Zapier maps the email and name fields to Mailchimp's requirements.
• Result: The Mailchimp action adds the subscriber to the correct audience.

Why use this automation?

• Control costs: You only sync the contacts you intend to email.
• Segment better: You map HubSpot properties to Mailchimp tags during the transfer.
• Reliable sync: You ensure that new leads in CRM are immediately actionable in email.

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