Mailchimp Squarespace Integration

Method 1: Mailchimp Extension (Commerce Plans)

How to Connect

Go to Extensions in your Squarespace dashboard and search for Mailchimp. Click Connect and authorize Mailchimp to access your Squarespace Commerce data. The extension syncs customer information, purchase history, and subscriber data between the two platforms automatically.

What the Extension Syncs

The Mailchimp extension pulls customer data from Squarespace Commerce - names, email addresses, purchase history, and order values. This data powers Mailchimp's e-commerce features: purchase-based segmentation, product recommendation emails, and revenue attribution reporting. You can see which email campaigns generate actual sales.

Limitations

The extension requires a Commerce plan and primarily syncs e-commerce data. It does not automatically add Squarespace form submissions (contact forms, newsletter signups) to your Mailchimp list - those require a separate connection method. For a detailed walkthrough of all Mailchimp connection methods, our guide to integrating Mailchimp with Squarespace covers every approach.

Method 2: Embedded Mailchimp Forms (All Plans)

Creating an Embedded Form in Mailchimp

In your Mailchimp dashboard, go to Audience > Signup Forms > Embedded Forms. Customize the form fields (email is required; name, company, and other fields are optional), design the form to match your Squarespace site's colors and fonts, and copy the generated HTML embed code.

Adding the Form to Squarespace

Add a Code Block to the page where you want the signup form, paste the Mailchimp embed code, and set the display mode to HTML. The form renders inline on your page and submits data directly to your Mailchimp audience - no middleware needed. For Code Block implementation, our guide to HTML code embedding on Squarespace covers responsive form embedding.

Styling the Embedded Form

Mailchimp's default form styling rarely matches your Squarespace template perfectly. Use Custom CSS in Squarespace to override the Mailchimp form's fonts, colors, input field styles, and button appearance. Target the Mailchimp form container class in your CSS. For CSS styling techniques, our guide to adding custom CSS to Squarespace covers targeting embedded elements.

Method 3: Squarespace Newsletter Block with Mailchimp

Squarespace's native Newsletter Block can connect to Mailchimp. Add a Newsletter Block to your page, and in the block's storage settings, select Mailchimp as the destination. Connect your Mailchimp account and choose the audience list where subscribers should be added. This creates a native-looking signup form that matches your template while sending data to Mailchimp.

The Newsletter Block method is simpler than the embedded form approach and produces a form that matches your template automatically. However, it offers fewer customization options than a fully embedded Mailchimp form.

Method 4: Zapier for Form Submissions

If you use Squarespace's native Form Blocks for contact forms and inquiries, Zapier can automatically add those form submissions to your Mailchimp audience. Create a Zap with "New Form Submission" as the trigger and "Add Subscriber to Audience" as the action. Map the form's email field to Mailchimp's email field and any other relevant data.

This method captures leads from every form on your site - not just newsletter signups - and adds them to Mailchimp for follow-up campaigns. For Zapier setup, our guide to using Zapier with Squarespace covers the workflow configuration.

Mailchimp Email Campaigns for Squarespace

Welcome Series

Automatically send a series of welcome emails when someone subscribes through your Squarespace site. Introduce your brand, share your best content, offer a first-purchase discount, and build the relationship before sending promotional campaigns.

Abandoned Cart Emails

With the Mailchimp extension connected to Squarespace Commerce, you can trigger abandoned cart emails when customers start checkout but do not complete the purchase. Include the abandoned products, images, and a direct link back to checkout.

Post-Purchase Follow-Ups

Send automated follow-up emails after a purchase - order confirmation, shipping updates, review requests, and product recommendations based on what the customer bought. These flows build loyalty and generate repeat purchases.

Segmented Campaigns

Use Mailchimp's segmentation tools to send targeted campaigns based on Squarespace data - customers who bought specific products, subscribers who joined from specific pages, or contacts who have not opened emails in 90 days. Segmented emails consistently outperform generic broadcasts.

Mailchimp vs. Squarespace Email Campaigns vs. Klaviyo

Mailchimp offers the best balance of features, ease of use, and pricing for most small businesses. It handles newsletters, automation, landing pages, and basic e-commerce email marketing.

Squarespace Email Campaigns is simpler and fully integrated - no third-party connection needed. Best for businesses that want basic newsletters without managing another platform.

Klaviyo is the most powerful option for e-commerce-focused email marketing with deep behavioral tracking and revenue attribution. Best for stores where email drives significant revenue. For Klaviyo setup, our guide to Klaviyo Squarespace integration covers the e-commerce connection.

Mailchimp Integration Best Practices

Use double opt-in. Configure Mailchimp to send a confirmation email before adding subscribers. This ensures your list contains real, engaged contacts and complies with email marketing regulations.

Segment from day one. Tag subscribers based on how they signed up - newsletter form, contact form, purchase, or popup. Different sources indicate different intent levels, and your email campaigns should reflect that.

Place signup forms strategically. Add newsletter signup forms in your footer (every page), after blog posts (readers who finished your content are engaged), and on a dedicated signup page. Multiple touchpoints increase total signups. For design placement strategies, our Squarespace design tips guide covers CTA positioning.

Clean your list regularly. Remove unengaged subscribers (no opens in 6+ months) to maintain deliverability and reduce costs. Mailchimp charges based on subscriber count, so a clean list is both more effective and more affordable. For SEO and marketing strategy, our Squarespace SEO guide covers how email engagement supports overall digital presence.

Troubleshooting Mailchimp Squarespace Integration

Subscribers Not Appearing in Mailchimp

Check which connection method you are using. The Newsletter Block connection sends data to Mailchimp when someone submits the form. Embedded Mailchimp forms send data directly. The Extensions marketplace connection syncs Commerce customers only. Verify the right method is active for the type of subscriber you expect.

Extension Not Syncing Commerce Data

Verify the extension is connected in both the Squarespace Extensions panel and Mailchimp's Integrations settings. Check that your Squarespace plan is Commerce Basic or Advanced. Allow 24 hours for historical data to sync after initial connection.

Embedded Form Looks Wrong on Squarespace

Mailchimp's default form CSS conflicts with your Squarespace template. Override the styling in Design > Custom CSS by targeting Mailchimp form classes. Set width to 100%, match your template's font family and sizes, and style the submit button to match your Squarespace buttons.

Connect Mailchimp and Start Growing Your List

Mailchimp integration turns every visitor interaction on your Squarespace site into an email marketing opportunity. Newsletter signups, form submissions, and purchases all feed into Mailchimp's automation engine - welcome series, abandoned cart recovery, and segmented campaigns that drive engagement and revenue.

Start with the connection method that matches your plan and needs. Add signup forms to your highest-traffic pages. Set up a welcome series for new subscribers. Then build from there as your list grows.