We started using Inbox25 for stand-alone email campaigns. The integration with our Sugar CRM system was our primary decision for selecting it along with the lower costs compared to other marketing automation platforms. It worked well for us to send out email campaigns for the first four years. We recently expanded to utilize more advanced capabilities including full marketing automation for drip campaigns. While it was a lot more work to setup, it is now running and producing results. We use Inbox25 for email campaigns to all audiences - suspects, prospects, and customers across four lines of business including our calibration lab, ERP software business, and Anytime Collect
product line which is all very different business units with unique needs from a marketing perspective.