Lob - A simple API to integrate print & mail solutions into your applications.

Goldmine CRM - Goldmine CRM is a Customer Relationship Management software that helps you build and manage your contact list, send follow-up emails, track your results and build better customer relationships using customer data and insights.

PostGrid - Transform your Offline Communications. Use our fully-documented REST API to send personalized letters, checks, postcards and improve address accuracy.

Tour de Force CRM - Tour de Force provides CRM, SFA, and BI software solutions that integrate with Outlook and your ERP system.

AmazingMail - Business print-mail solution

YetiForce CRM - Yetiforce helps companies best utilize free professional opensource CRM to lower costs and improve performance throughout the entire communication structure.