Description
The Mailchimp addon connects WS Form forms to your Mailchimp audience, adding an “Add to a Mailchimp List” action that triggers on form submission or save and maps fields to merge fields, interest groups, and tags. The integration supports double opt-in via Pending status, VIP marking, and updating existing contacts, catering to those who capture leads through WordPress and want to feed segmented campaigns without exporting spreadsheets.
Key Features of Mailchimp
- Send-time registration action
Triggers “Add to a Mailchimp List” when the form is saved or submitted. - Merge field mapping
Links each form field to the matching merge field of the audience. - Interest group mapping
Converts Select, Checkbox, and Radio fields into contact interests in Mailchimp. - Tag management
Adds, removes, and updates tags on new or existing contacts in the list. - Double opt-in support
Registers contacts with Pending status for sending the confirmation email configured in the list.
Benefits of Mailchimp
- Automated lead capture
Each submission turns into a segmented contact in the audience without manual spreadsheet export. - Campaign-ready segmentation
Tags and interest groups categorize the contact at the moment of registration. - GDPR compliance
An unchecked opt-in checkbox and double-confirmation flow cover explicit consent. - Form synced with the list
Automatic creation from the audience eliminates rework when designing the signup.
Who Should Use Mailchimp?
- Those who use Mailchimp as their email marketing foundation and want to capture leads through WordPress without exporting CSV.
- Marketing teams that need to segment contacts by interest and tag at sign-up.
- Those who manage newsletters, event lists, or restricted areas and require a double-opt-in flow per GDPR.
How to Download Mailchimp
Mailchimp is available for download here on Ultrapack. After downloading the .zip file, install it via Plugins > Add New > Upload Plugin, select the file and activate; the base WS Form plugin must be installed and active. The new “Add to a Mailchimp List” action then appears in the action settings of each form.
For those already working with Mailchimp and using WS Form for capture, this addon closes the loop between data collection and sending: each registration enters the correct audience with filled merge fields, marked interest groups, and applied tags. Creating a form from an existing list and updating registered contacts reduce maintenance effort as the segmentation strategy evolves.
Frequently asked questions
Is WS Form Mailchimp GPL-licensed?
Yes. WS Form 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 WS Form Mailchimp on multiple sites?
Yes. You can use WS Form Mailchimp on multiple sites. The number of sites connected to Ultrapack Auto Updater is limited by your plan.
How much does WS Form Mailchimp cost at Ultrapack?
WS Form 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 WS Form Mailchimp include updates?
Yes. The current version of WS Form Mailchimp is 1.0.14, published at Ultrapack on Nov 30, 2023. Subscribers update straight from the WordPress dashboard with UAU (Ultrapack Auto Updater).
Is WS Form Mailchimp scanned before publication?
Yes. Every version of WS Form Mailchimp goes through a malware scan (ClamAV and YARA rules, at UltraHub) before it is published.
What changed in this version
Version 1.0.14 06/22/2022
- Added: Support for subscription to multiple lists by using more than one action
Version 1.0.13 Sep 2, 2022
- Added: GDPR preference opt-in if opt-in field specified and settings and member checks it
Version 1.0.12 Sep 2, 2022
- Bug Fix: MD5 hash using lowercase of email address
Version 1.0.11 06/14/2021
- Added: status_if_new parameter added
Version 1.0.10 Sep 11, 2021
- Added: Added support for parse variables in tags
Release notes published by the developer.
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
ws-form-mailchimp.zip. - In the WordPress dashboard, go to Plugins > Add New > Upload Plugin.
- Select the file
ws-form-mailchimp.zipand click Install Now. - Click Activate.
Stuck on a step? Open a ticket telling us which one you stopped at.

UAU Ready