Connect non-Hubspot forms to Mailchimp

Using Hubspot with Mailchimp lets you capture leads from non-Hubspot forms and send them directly into targeted email lists without manual work.

This guide walks through how to connect those external forms to Mailchimp, how to map fields, and how to keep your data clean and consistent.

How the Hubspot and Mailchimp connection works

When a visitor submits a non-Hubspot form on your website, Hubspot can detect that submission, create or update a contact, and then pass that contact to Mailchimp through list and field mappings.

The connection typically relies on three core elements:

• The non-Hubspot form embedded on your site
• The tracking code that allows Hubspot to see the form submission
• Your Mailchimp audience (list) and any related tags or groups

Once these are in place, you configure an action so that each qualifying form submission is sent to the right Mailchimp list with the correct data.

Prerequisites for using Hubspot with Mailchimp

Before you connect non-Hubspot forms, confirm that your environment meets the basic requirements.

Accounts and access you need in Hubspot

• An active Hubspot account with permissions to manage forms and integrations
• Hubspot tracking code installed on every page that hosts a non-Hubspot form
• Access to the forms or settings area where non-Hubspot forms are detected

Accounts and settings inside Mailchimp

• An active Mailchimp account
• At least one Mailchimp audience (list) already created
• Any custom fields or merge tags you plan to map from form fields

If you need implementation or integration assistance beyond this tutorial, you can contact a Hubspot specialist at Consultevo for consulting and technical setup help.

Step-by-step: connect a non-Hubspot form

Follow these steps to connect a detected non-Hubspot form to Mailchimp so every new submission becomes a contact in your selected audience.

1. Confirm Hubspot is detecting your form

1. Log in to your Hubspot account.
2. Navigate to the forms area where non-Hubspot forms appear.
3. Check the list of detected forms and locate the form you want to sync with Mailchimp.

If the form does not appear, verify that:

• The page has the Hubspot tracking code installed.
• The form is a standard HTML form rather than a canvas, iframe, or script-only widget.

2. Open the non-Hubspot form settings

1. Select the detected non-Hubspot form.
2. Open its detailed settings or options panel.
3. Locate any section labeled for actions, integrations, or follow-up options.

This area is where Hubspot lets you define how a submission creates or updates a contact and how it syncs with Mailchimp.

3. Connect the form to Mailchimp

1. In the form settings, find the option to add or configure a Mailchimp action.
2. Choose the Mailchimp account or connect one if you have not already done so.
3. Select the specific Mailchimp audience (list) where new contacts should be added.

Make sure you pick the list used for the campaign or automation that will follow these sign-ups.

Map Hubspot form fields to Mailchimp

Accurate data mapping is essential so contacts appear correctly in Mailchimp and can be segmented or personalized in campaigns.

4. Align contact properties and merge fields

1. Within the Mailchimp action settings in Hubspot, open the field mapping or property mapping area.
2. For each form field, choose the corresponding Mailchimp field or merge tag (for example, email, first name, last name).
3. Ensure required fields in Mailchimp, especially email address, are mapped from mandatory fields in your form.

You can usually map:

• Email address
• First name and last name
• Company name
• Custom fields such as interests, product type, or source

5. Add tags or groups in Mailchimp

Depending on how Mailchimp is configured, your Hubspot action may let you assign:

• Tags that label contacts based on the non-Hubspot form they used
• Groups or segments for specific marketing workflows

Use consistent naming for tags so you can easily filter contacts and measure performance of each form and channel.

Test the Hubspot and Mailchimp sync

Before relying on your integration in a live campaign, run tests to confirm that submissions pass correctly to Mailchimp.

6. Submit a test form entry

1. Open the live page containing the non-Hubspot form.
2. Submit a test entry using a unique email address.
3. Wait a short period to allow Hubspot to process the submission and send it to Mailchimp.

7. Verify the contact inside Mailchimp

1. Log in to your Mailchimp account.
2. Open the audience (list) you selected earlier.
3. Search for the test email address.

Check that:

• The contact exists in the correct audience.
• Fields such as name and custom properties match what you entered in the form.
• Any tags or groups configured in Hubspot are visible on the contact in Mailchimp.

If the contact does not appear, revisit your field mappings and Mailchimp action settings in Hubspot and repeat the test after any adjustments.

Optimize non-Hubspot form performance

Once your integration is working, you can improve results by refining form fields and how you use Mailchimp campaigns.

Use appropriate number of fields

Balance the information you request with conversion rates:

• Keep required fields to a minimum for top-of-funnel offers.
• Use optional fields or additional non-Hubspot forms for deeper qualification.
• Ensure every field you sync to Mailchimp has a real purpose in segmentation or personalization.

Leverage automation and segmentation in Mailchimp

With the integration configured in Hubspot, you can:

• Trigger Mailchimp welcome sequences for each new subscriber.
• Segment contacts by the specific non-Hubspot form that created them.
• Run nurture campaigns tailored to interests captured in custom fields.

Troubleshooting common integration issues

When non-Hubspot forms do not appear in Mailchimp as expected, most issues fall into a few categories.

Tracking and detection problems

• Confirm that the Hubspot tracking code is installed correctly on the form page.
• Avoid form types that cannot be detected, such as some embedded widgets or iframes.
• Test on a public, accessible URL rather than a local development environment.

Field and list configuration issues

• Verify that the email field in the form maps to the primary email field in Mailchimp.
• Check that required Mailchimp fields have valid mappings from Hubspot properties.
• Ensure that you selected the correct Mailchimp audience in the form action.

Where to find official documentation

For exact, up-to-date instructions and any new configuration options, review the official Hubspot documentation at this Mailchimp integration guide. It provides the latest screenshots, interface labels, and compatibility notes.

Next steps with Hubspot and Mailchimp

After your non-Hubspot forms are connected and tested, you can expand your strategy by adding more forms, refining lists, and building automation journeys in Mailchimp. Periodically review field mappings and tags in Hubspot so your data stays aligned with evolving campaigns and reporting needs.

Need Help With Hubspot?

If you want expert help building, automating, or scaling your Hubspot , work with ConsultEvo, a team who has a decade of Hubspot experience.

Scale Hubspot

“`