Download websites that use MailChimp for WordPress

About MailChimp for WordPress

Version data is the part of a technology profile that ages fastest and reveals the most. For MailChimp for WordPress a release string can be read from a large share of the population, and across those sites we count 149 distinct releases still in circulation. One of them, 4.14.1, recurs across a substantial part of the group, while the remainder spreads over a long tail of older builds that nobody has touched in years.

A spread like that is a behavioural measurement rather than a technical one. Managed hosts that force updates cluster their customers on recent releases, self managed sites drift backwards at the speed of their owners' attention, and abandoned sites freeze at whatever was current when the last person stopped logging in. Anyone selling maintenance, security or a managed platform can read the tail directly as a list of sites that have stopped being cared for, and anyone tracking vulnerability exposure can use the same tail to bound the size of an affected population instead of guessing at it.

The plugin itself is a bridge between two systems. Written in PHP and published under GPL v2 by ibericode since 2012, it connects forms on a site to a mailing list account held with an outside email service. Presence therefore implies two things at once, which is unusual for a single field. The site collects email addresses from visitors, and the site has a commercial relationship with a specific provider. Few technologies hand you the intent and the vendor in the same observation.

The plugin is also not the official integration, which is worth knowing before drawing conclusions about lock in. An independent developer built a more flexible form layer than the official one, and site owners chose it deliberately, often alongside a separate form builder or a shop. The neighbours are informative in their own right, because a subscription form beside a checkout is a lifecycle marketing setup, while a subscription form standing alone is usually a publisher or a lead capture page.

As of October 2026 the plugin is detected on 68,488 sites, with 26,981 in United States and the domain mix led by .com. English language markets are heavily represented, which follows the commercial footprint of the email service rather than anything about the plugin.

The limits are worth stating. Version strings come from asset URLs and query parameters that caching, minification and optimisation plugins can strip, so version coverage is a subset of the total and a missing version is not evidence of an old install. Detection also cannot see whether the connected account is active, whether campaigns still go out, or how many subscribers sit behind the form.

A per domain lookup answers whether one site runs the plugin. The download answers the questions that need the population: which sites run outdated releases, which sectors pair email capture with commerce, which countries lag on updates, and how many sites dropped the integration between two crawls. Competing email platforms use it as a prospecting base, agencies use it to find maintenance work, and researchers use the version distribution as one of the few clean measures of update discipline available across the open web.