MC4WP Premium — Mailchimp for WordPress Forms and Newsletter Plugin

MC4WP (Mailchimp for WordPress) is the most popular plugin for connecting WordPress to Mailchimp, with over 77 million downloads. It lets you add sign-up forms to your site via shortcode, widget, or Gutenberg block, and integrates with WooCommerce, Contact Form 7, Gravity Forms, Ninja Forms, and WPForms to automatically subscribe customers. The plugin handles double opt-in, supports Mailchimp tags and groups, and includes a form builder with customizable HTML templates. For sites already using Mailchimp for email marketing, MC4WP is the standard integration tool, making it easy to grow your email list directly from your WordPress site. It competes with MailPoet Premium in the email marketing space, but MC4WP focuses specifically on Mailchimp integration rather than providing a standalone email sending solution.

The plugin uses the Mailchimp API v3 for subscriber management, with support for list segmentation, interest groups, and merge tags. It includes built-in caching for API responses to reduce load times and avoid rate limiting.

Competitive Features

• Mailchimp integration — connect your WordPress site to Mailchimp in seconds with API key authentication
• Custom sign-up forms — build forms with HTML templates or use the built-in form builder with field customization
• WooCommerce integration — automatically subscribe customers to Mailchimp lists based on purchase behavior
• Form builder integration — works with Contact Form 7, Gravity Forms, WPForms, Ninja Forms, and more
• Double opt-in — configurable opt-in options per Mailchimp audience with custom confirmation messages
• Mailchimp tags — automatically tag subscribers based on form used or product purchased
• Interest groups — assign subscribers to Mailchimp interest groups through form fields

Key Features

• Form types — shortcode [mc4wp_form], Gutenberg block, widget, and PHP function mc4wp_show_form()
• Form styling — built-in form themes with custom CSS support for complete design control
• Checkbox integration — add newsletter sign-up checkboxes to comment, registration, and checkout forms
• Top Bar add-on — sticky top bar sign-up form with customizable design (free add-on)
• Boxzilla popup — popup sign-up forms with exit intent and scroll triggers (free add-on)
• Ajax submission — form submission without page reload with real-time validation
• GDPR tools — consent checkboxes and data privacy controls for compliance

Comparison with Competitors

MC4WP vs MailPoet Premium

Aspect	MC4WP	MailPoet Premium
Email sending	Via Mailchimp	Built-in (MailPoet Sending Service)
WooCommerce integration	Yes	Yes
Form builder	HTML templates	Drag-and-drop
Automation	Via Mailchimp	Built-in
Data storage	Mailchimp servers	Your server

Bottom line: MailPoet Premium runs on your own server and includes built-in email sending. MC4WP is the better choice if you’re already using Mailchimp and want deep WordPress integration without switching platforms.

Recommended Stack: MC4WP connects WordPress to Mailchimp. For popup forms to grow your email list faster, pair it with OptinMonster for exit-intent popups.

Official Changelog

Version 4.14.1

Release Date: September 10, 2026

• Security: Escape dynamic content tags based on where they appear in the HTML. Values in URL attributes can no longer use a protocol like javascript:, and values in event handler attributes are removed.
• Integrations: Prosopo Procaptcha now follows the alignment of the surrounding form.
• Integrations: Fixed Prosopo Procaptcha breaking other scripts on the page when the theme wraps the form in paragraph tags.
• Misc: Fixed the Mailchimp Site Tracking Pixel not finding an already connected site for the same domain, for example when it was registered with a www. prefix or on a multisite subdirectory install.
• Misc: Log the full Mailchimp error message when the Site Tracking Pixel fails to connect.

Version 4.14.0

Release Date: August 4, 2026

• Integrations: Show the sign-up checkbox on the admin “Add New User” form.
• Misc: Added a code snippet for sending the WordPress username to Mailchimp with User Sync.
• Misc: Updated WordPress Coding Standards to 3.4 and fixed a few incorrect type annotations.

Version 4.13.1

Release Date: June 22, 2026

• Forms: Improved handling of pasted form wrapper tags in form content.
• Forms: Removed mc4wp_default_form_id option. The first available form is now the default.
• Forms: Improved the {email} dynamic content tag by detecting common lowercase email field names.
• Misc: Adhere to DB, Security, I18n sniffs from WordPress Coding Standards.
• Misc: Prevent direct access to plugin configuration files.
• Misc: Removed the plugin review request from the footer of plugin admin pages.
• Security: Added Patchstack vulnerability disclosure instructions to the plugin FAQ and security policy.

Frequently Asked Questions

Is MC4WP free?

The core plugin is free and includes form creation, Mailchimp integration, and basic styling. The premium version adds WooCommerce integration, advanced form styling, and priority support.

Does MC4WP work with WooCommerce?

Yes. The premium version automatically subscribes WooCommerce customers to your Mailchimp lists based on purchase behavior, and can add purchase data to Mailchimp for targeted campaigns.

Can I add a sign-up checkbox to my Contact Form 7 forms?

Yes. MC4WP provides a shortcode [mc4wp_checkbox] that you can add to any CF7 form to display a newsletter sign-up checkbox.

How do I style the sign-up form?

MC4WP includes built-in form themes that you can select from the settings. For advanced customization, you can add custom CSS targeting form elements like .mc4wp-form, .mc4wp-form p, and .mc4wp-form input.

Does MC4WP support GDPR compliance?

Yes. MC4WP includes consent checkboxes, data privacy controls, and the ability to add confirmation checkboxes to all integrated forms.