MC4WP: Mailchimp for WordPress vs WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin (2026): PluginCheck
Quick Verdict
Pick MC4WP if your only goal is Mailchimp signups, forms, and list growth on a single email platform. Pick WP Mail SMTP if you have any contact forms, WooCommerce orders, or transactional email that needs to land in inboxes reliably.
Both plugins tackle email concerns in WordPress, but they solve very different problems. MC4WP connects your site to Mailchimp so you can collect subscribers and send newsletters, while WP Mail SMTP fixes email deliverability by routing WordPress mail through a proper SMTP service. The overlap is small, so the choice really depends on whether your pain point is growing a list or making sure emails actually arrive.
MC4WP: Mailchimp for WordPress
The #1 Mailchimp plugin for WordPress. Allows you to add a multitude of newsletter sign-up methods to your site.
- Active installs 1M+
- Rating 4.8/5 (1,497)
- Last updated Sep 16, 2026
- Support resolved 100%
- Tested to WP 7.1.1
- Requires PHP 7.4
WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin
Make email delivery easy for WordPress. Connect with SMTP, Gmail, Outlook, SendGrid, Mailgun, SES, Zoho, + more. Rated #1 WordPress SMTP Email plugin.
- Active installs 4M+
- Rating 4.8/5 (5,185)
- Last updated Jun 25, 2026
- Support resolved 87%
- Tested to WP 7.0.4
- Requires PHP 7.4
Where MC4WP: Mailchimp for WordPress Wins
Tighter Mailchimp integration
MC4WP is purpose-built for Mailchimp with 1 million active installs and a 100% support resolution rate, indicating deep, focused expertise on a single platform rather than a broad but shallow integration.
Lighter footprint
For sites that only need newsletter signups without touching transactional mail, MC4WP avoids the broader configuration surface of an SMTP plugin, keeping things simpler.
Where WP Mail SMTP by WPForms – The Most Popular SMTP and Email Log Plugin Wins
Massive install base and trust
WP Mail SMTP sits at 4 million active installs with 5,185 ratings, four times the user base of MC4WP, which signals stronger community vetting and fewer edge-case bugs.
Broader mailer support
It works with SMTP, Gmail, Outlook, SendGrid, Mailgun, SES, Zoho, and more, covering both transactional deliverability and Mailchimp-adjacent sending needs in one plugin.
Higher overall quality score
WP Mail SMTP scores 97.01 versus 88.77 for MC4WP, driven by a 99/30 popularity score compared to MC4WP's 90/30.
Score-by-Score Comparison
WP Mail SMTP leads clearly with a 99/30 popularity score and 4 million installs versus MC4WP's 90/30 and 1 million installs.
Both plugins score a perfect 100/25 on maintenance, with frequent updates from active development teams within the last few months.
Both plugins tie at 96/15 with identical user ratings, though WP Mail SMTP's score is based on over 5,000 reviews versus under 1,500 for MC4WP, giving it a larger sample.
MC4WP edges out support with a 100% resolution rate and 50/15 score, versus WP Mail SMTP's 87% resolution rate and 87/15 score, suggesting more consistent help on the smaller plugin.
Both plugins score a full 100/15 on compatibility, reflecting broad WordPress and PHP version support across recent releases.
The Bottom Line
For most WordPress site owners, WP Mail SMTP is the safer default pick, given its 97.01 quality score, 4 million installs, and broader role in fixing a problem (deliverability) that affects nearly every site. MC4WP is still the specialized choice if Mailchimp is your sole email marketing platform and you want focused forms and list growth without SMTP complexity. The deciding question is simple: are you trying to collect subscribers or trying to make sure your existing emails get delivered?