The actual version of Freesoul supports MailChimp as a newsletter provider.

You will find the Mailchimp settings page clicking on the sub-menu item of Freesoul Settings “MailChimp Settings”

After saving the Mailchimp API key, Freesoul will fetch all your MailChimp lists.

You can include the newsletter opt-in associated to one of your MailChimp lists in any pages or posts using the Freesoul Builder element “Newsletter”.