Mailchimp for WordPress

The most popular, developer-friendly Mailchimp integration plugin for WordPress.

• Official Website: https://www.mailchimp.com/
• Primary Category: Email Newsletters & Marketing Automation
• License / Pricing: Freemium

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Overview

Mailchimp for WordPress (MC4WP) by ibericode has powered over 2 million websites. It makes creating beautiful newsletter signup forms effortless while seamlessly adding newsletter opt-in checkboxes to WooCommerce checkouts, comment forms, and registration pages.

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Key Features

• Custom HTML Forms: Total control over signup form HTML markup and styling to match any theme.
• Checkout Opt-Ins: Integrates opt-in checkboxes into WooCommerce, Easy Digital Downloads, and BuddyPress.
• List & Tag Sync: Map form fields directly to Mailchimp merge tags, interest groups, and subscriber tags.
• Developer API Hooks: Dozens of filters and action hooks to modify payload data before sending to Mailchimp.
• Double Opt-In: Full support for GDPR-compliant double opt-in confirmation sequences.

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Code & Integration Example

// Add custom interest group during MC4WP subscription
add_filter( 'mc4wp_form_data', function( $data ) {
    $data['INTERESTS']['group_id'] = true;
    return $data;
} );

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Why Developers Choose Mailchimp for WordPress

MC4WP is lightweight, rock solid, and respected by developers as the definitive Mailchimp WordPress bridge.

• Developer Friendly: Built to respect WordPress coding standards with action hooks and filters.
• Actively Maintained: Frequently updated for the latest major WordPress versions.
• Community Backed: Comprehensive documentation, tutorials, and community support forums.