wpsolutions

The Contact Form 7 AutoResponder Addon plugin allows you to automatically add people to your MailChimp list after they’ve submitted one of your Contact Form 7 forms.
The plugin will read any type of configured fields which are submitted from your CF7 form and insert the information in the relevant Mailchimp list.
For more information on how to configure and use this plugin please <a href="https://wpsolutions-hq.com/contact-form-7-mailchimp-addon-plugin" rel="nofollow ugc">see this</a> page.

CF7 AutoResponder Addon

Allows automatic subscription of people to your MailChimp list after they've submitted a CF7 form. > GDPR-compliance: This plugin works in ta …

Dave Doolin

Aweber Super Simple is a plugin that will subscribe a user whenever 
he/she registers to your blog.
The AWeber Super Simple options page allows you to configure the plugin to: 
* Choose whether or not to display the optin checkbox. Users may register if optin isn’t shown, and will not added to autoresponder. 
* Choose a checked or unchecked default status for the optin checkbox on registration. 
* Provide a custom optin greeting message for visitors
This code base is at least once, possibly 3, 3 or more times removed from what was the original 
code base. Wherever or whenever the ultimate source, the base code is old in WordPress years. 
Current effort is to bring everything up to 2.8 coding standards before attempting any extensions.
<h3>Support</h3>
Initial functionality will be supported on a time-available basis.
Installation, configuration and further programming support may be 
available on a contract basis. Contact author with request.

Aweber Super Simple

AWeber Super Simple allows you to subscribe users to an AWeber autoresponder when they register on your blog. NOTE: ALPHA VERSION.  Be careful.

CF7 AutoResponder Addon vs Aweber Super Simple