Our Campaign Monitor WordPress plugin adds leads automatically from your WordPress forms to your Campaign Monitor account. Select a list, match up form fields to Campaign Monitor fields, and you're done.
Campaign Monitor is included in the Formidable Forms Business license.
Formidable is perhaps the single most useful WP plugin I've ever come across - wonderful product and I must also say extremely fast support response.John Bowden
Accept one-time payments directly on your site, using Authorize.net AIM.
Add custom fields to configure WooCommerce product forms to collect more data.
Add WordPress form leads to GetResponse and trigger their marketing automations.