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MC4WP: Mailchimp for WordPress

By Danny van Kooten

E-commerce & Shopping /

Reviewed by Omar Dabbas

Trusted WordPress expert with 20+ years of experience evaluating plugins for the WP ecosystem.

MC4WP: Mailchimp for WordPress Review - In-Depth Analysis

The #1 Mailchimp plugin for WordPress. Allows you to add a multitude of newsletter sign-up methods to your site.

Performance Overview

WPS Score

7.57/10

User Rating

4.8/5 (based on 1497+ reviews)

Active Installations

1,000,000+

Update Frequency

Outstanding It is calculated using the weighted average of same category plugins.

Security Score

4.9 / 10 (Low Risk) It is calculated using the weighted average of all versions.

What It Does

Allowing your visitors to subscribe to your newsletter should be easy. With this plugin, it finally is.

This plugin helps you grow your email list in Mailchimp. You can use it to create good looking and accessible sign-up forms or integrate with any other existing form on your WordPress site, like your contact, comment or checkout form.

Connect with your Mailchimp account in seconds. Sign-up forms are user-friendly and mobile optimized. You have complete control over the form fields and can build your forms using native HTML.

Seamless integration with various plugins like WooCommerce, Contact Form 7, and Gravity Forms is available. If your plugin is not listed, you can still use the custom integration feature.

The premium version allows you to send WooCommerce orders to Mailchimp, enabling you to track subscriber purchases and campaign revenue.

Well documented through a knowledge base, this plugin is developer friendly and compatible with PHP 8.5. Mailchimp is a popular newsletter service that is free for lists with up to 500 subscribers.

If you need help, you can search the knowledge base, open a support topic, or contact premium support via email.

Comparing to Alternatives

MC4WP sits in a crowded field of email marketing connectors for WordPress, ranging from Mailchimp-specific tools to broader ESP integrations. It remains a popular choice thanks to its long track record and simplicity, though several competitors offer deeper e-commerce or multi-provider flexibility.

Top alternatives

Strengths

Very high user satisfaction with a 92% five-star rating
Simple, intuitive setup for connecting Mailchimp forms and lists
Long-standing reliability, with users reporting years of stable use
Responsive and knowledgeable support team
Works well for basic form and popup integrations without extra plugins

Weaknesses

Notable history of security vulnerabilities across multiple versions
Primarily focused on Mailchimp, limiting flexibility for multi-ESP setups
Some advanced marketing automation features require the Pro upgrade

User Sentiment Analysis

With 1,497 ratings and a 4.8/5 average, sentiment is overwhelmingly positive—92% of reviewers give five stars, and only 3.9% fall into the 1-2 star range. Recent reviews reinforce this, highlighting ease of use, reliability, and strong customer support.

Positive highlights

"Perfect and fast help by Arne from your support team" — kowalke
"We've used this for over a decade and it continues to work very reliably" — ilumos
"Reliable, well maintained, and easy to use... support team is fast, professional, and very helpful" — m4
"Connected my newsletter lists in a minute. New subscribers sync immediately" — tsengco
"Very very useful it helps me solve a big issue concerning mailing subscribers" — madjidbekai2026

Common complaints

Weaknesses

A documented history of nine security vulnerabilities, including high and medium severity XSS and unauthenticated subscription deletion issues
No 1-2 star reviews were available to surface specific recurring complaints, making it harder to gauge common pain points

Who Should Use This?

Best for

MC4WP is ideal for site owners who specifically use Mailchimp and want a straightforward, no-frills way to connect signup forms, popups, and checkout fields to their mailing lists. Its long track record and strong support make it a solid choice for bloggers, small businesses, and anyone prioritizing simplicity over complex automation.

Not ideal for

Users needing multi-ESP flexibility or deep WooCommerce-specific automation may find dedicated alternatives more suitable. Security-conscious site owners should also ensure they stay current with updates, given the plugin's history of patched vulnerabilities, including a high-severity reflected XSS issue and an unauthenticated subscription deletion flaw.

Pricing & Value

Free version includes

The free version covers core Mailchimp integration: connecting forms, syncing subscribers, and basic popup or widget functionality, which is enough for most straightforward mailing list needs.

Pro version (59 - 149 USD / year)

The Pro version typically unlocks advanced features such as more sophisticated form styling, conditional logic, e-commerce data syncing, and additional integrations with other WordPress plugins and page builders.

Final Verdict

MC4WP earns its strong reputation through years of reliable performance, ease of use, and consistently praised support—reflected in its 4.8/5 rating and overwhelming five-star share. For users who just need dependable Mailchimp integration without much complexity, it remains a dependable pick, and the free version alone satisfies most basic use cases.

That said, its lengthy history of security patches, including a high-severity XSS and an unauthenticated deletion vulnerability, means users must stay diligent about updates. Combined with strong competition from alternatives offering broader ESP support or deeper WooCommerce integration, MC4WP is best suited to Mailchimp loyalists who prioritize simplicity and are committed to keeping the plugin current.

Other Notable Features

Here are a few other notable features of this free MC4WP: Mailchimp for WordPress plugin.

Form

Mailchimp

Newsletter

Screenshots

FAQ

You can find your Mailchimp API key here

Use the following shortcode in your CF7 form to display a newsletter sign-up checkbox.

[mc4wp_checkbox "Subscribe to our newsletter?"]

Our knowledge base has more information on connecting Contact Form 7 and Mailchimp.

You can use custom CSS to style the sign-up form if you do not like the themes that come with the plugin. The following selectors can be used to target the various form elements.

.mc4wp-form { ... } /* the form element */ .mc4wp-form p { ... } /* form paragraphs */ .mc4wp-form label { ... } /* labels */ .mc4wp-form input { ... } /* input fields */ .mc4wp-form input[type="checkbox"] { ... } /* checkboxes */ .mc4wp-form input[type="submit"] { ... } /* submit button */ .mc4wp-alert { ... } /* success & error messages */ .mc4wp-success { ... } /* success message */ .mc4wp-error { ... } /* error messages */

You can add your custom CSS to your theme stylesheet or (easier) by using a plugin like Simple Custom CSS