# Add New HubSpot Contacts to Mailchimp Lists

> Watch HubSpot for new contacts and add each one as a Mailchimp subscriber, or update an existing one, so your email list stays current without manual copying.

- URL: https://www.automongo.com/automations/hubspot-to-mailchimp/
- Summary: Sync every new HubSpot contact into a Mailchimp audience so campaigns never miss them.
- Tools: Zapier
- Difficulty: Beginner
- Category: Marketing
- Tags: hubspot, mailchimp, contacts, email-marketing, list-sync
- Published: 2026-10-25
- External resource: https://zapier.com/apps/hubspot/integrations/mailchimp/1785/add-new-hubspot-contacts-to-mailchimp-lists

## How It Works

The Zap polls HubSpot for new contacts. Every time a contact is created in HubSpot, the Zap passes the record to Mailchimp's Add/Update Subscriber action and writes the person into the audience you choose. The same action updates an existing subscriber if the email already exists, so sales and marketing stay in sync without duplicate list rows.

### Setup Steps

1. **Connect HubSpot**: Sign in to the HubSpot portal that holds your contacts and grant Zapier read access.
2. **Connect Mailchimp**: Sign in to the Mailchimp account and allow Zapier to write subscribers.
3. **Pick the Audience**: In the Mailchimp step, choose the audience that should receive new HubSpot contacts.
4. **Map the Fields**: Match HubSpot email, first name, last name, and any tags you track to the Mailchimp merge fields.
5. **Turn On the Zap**: Publish the Zap so new HubSpot contacts flow into Mailchimp automatically.

### Automation Workflow

```
HubSpot (New Contact) → Mailchimp (Add/Update Subscriber)
```

### Benefits

- **Nothing Falls Through**: Every HubSpot contact lands in Mailchimp, so promotional sends never miss a new lead.
- **Idempotent Writes**: Add/Update Subscriber handles the duplicate case, so re-running the Zap never creates list bloat.
- **Zero Maintenance**: Mapping the audience once is enough; the Zap keeps running without weekly cleanup.
- **Campaign-Ready**: Marketers design the campaign; the list is already updated by the time the send goes out.

### Use Cases

- SaaS marketing teams running Mailchimp newsletters while sales lives in HubSpot.
- E-commerce brands syncing new wholesale contacts into a dedicated Mailchimp audience.
- Event teams pushing new HubSpot contacts into a Mailchimp audience segment for pre-event email sequences.
- Nonprofits adding every new donor contact into a Mailchimp list for stewardship emails.