Description
The MailChimp addon connects Pie Register registration forms directly to your MailChimp lists, adding an opt-in field at signup and sending each new user as a subscriber as soon as the account is created. Designed for those who capture leads via registration in WordPress and want to feed email marketing campaigns without exporting CSV or manually entering contacts into the platform.
Key Features of MailChimp
- Automatic sync of signups
Sends each new Pie Register user as a subscriber to the chosen list. - Opt-in field on the form
Includes a consent checkbox in signup to authorize sending to the list. - Target list selection
Allows choosing which MailChimp audience the new contacts are added to. - Mapping of registration fields
Routes form data to the corresponding merge fields in the MailChimp account. - Connection via API key
Sets up the integration by entering the MailChimp API Key in the Pie Register panel.
Benefits of MailChimp
- Always updated list
Each new signup appears in the audience without manual work or periodic import. - Consent compliance
Explicit opt-in helps respect best practices of permission before campaign triggers. - More time for strategy
Eliminates back and forth between WordPress and MailChimp and frees focus for content and segmentation. - Email funnel ready from signup
The contact enters automation the moment they create an account on the site.
Who is MailChimp recommended for?
- Those running a membership site in WordPress and using MailChimp as their primary email tool.
- Designed for those who produce courses, communities or restricted areas and want to nurture new signups with automatic sequences.
- Those already using Pie Register for custom registration and need each signup become a lead in the email audience.
How to download MailChimp
MailChimp is available for download here in Ultrapack. After downloading the .zip file, install it in Plugins > Add New > Upload Plugin, select the file and activate with Pie Register already installed. Then open the Pie Register settings to enter the API key and choose the target list.
For WordPress sites that capture leads via registration forms, MailChimp turns signup into a marketing event, linking registration and email nurturing into one flow. By removing the manual step of migrating contacts between platforms, the addon keeps the audience synced and opens space to build segmented automations from the first visitor contact with the site.
Frequently asked questions
Is Pie Register MailChimp GPL-licensed?
Yes. Pie Register MailChimp is distributed under the GPL (GNU General Public License). You may legally use, modify and redistribute it on as many sites as you want.
Can I use Pie Register MailChimp on multiple sites?
Yes. You can install Pie Register MailChimp on as many sites as you want. Only automatic updates through Ultrapack Auto Updater have a limit: from 3 to 80 sites, depending on the plan.
How much does Pie Register MailChimp cost at Ultrapack?
Pie Register MailChimp costs US$2.99 as a single purchase, and it is also included in the subscription plans starting at US$12/mo (VIP I).
Does Pie Register MailChimp include updates?
Yes. The current version of Pie Register MailChimp is 2.4.7, published at Ultrapack on Dec 5, 2023. Subscribers update straight from the WordPress dashboard with UAU (Ultrapack Auto Updater).
Is Pie Register MailChimp scanned before publication?
Yes. Every version of Pie Register MailChimp goes through a malware scan (ClamAV and YARA rules, at UltraHub) before it is published.
How to install
Automatic updates: this item is updated by the Ultrapack Auto Updater. With it installed, the new version shows up in your dashboard like any other WordPress update (how to set it up).
- Download the file
pie-register-mailchimp.zip. - In the WordPress dashboard, go to Plugins > Add New > Upload Plugin.
- Select the file
pie-register-mailchimp.zipand click Install Now. - Click Activate.
Stuck on a step? Open a ticket telling us which one you stopped at.

UAU Ready