When a company is ready to market to its existing customers, having the right tools on hand makes the prospect easier. Open source customer relationship management (CRM) software is an ideal solution for digging through all of the data and making sure that marketing to existing customers goes as smoothly as possible. The team at EspoCRM understands how to create and develop open source CRM tools that are both powerful and easy to use. Their tools are ideal for new employees and experienced data analysts alike. Companies that use the open source CRM tools provided by EspoCRM may find that their sales go up, especially their existing customer sales. The tools can be used to send reminders or special offers to customers who have not shopped in a while. The tools could also be used to market related products or services to people who have made a related product purchase.