List of the Top 3 Billing and Invoicing Software for Zen Cart in 2025

Square POS is an easy-to-use point-of-sale solution that offers a comprehensive array of features for managing various retail operations. Users can efficiently track inventory and sales, process payments online, and issue digital receipts. This versatile system is compatible with both Android and iOS devices. Notably, Square POS can operate offline by saving transaction data locally, automatically syncing with the cloud once an Internet connection is reestablished. Users can keep track of essential details like product names, pricing, and quantities with ease. Additionally, it includes functionalities such as barcode scanning, discount applications, credit card processing, gift card management, and the ability to handle refunds, making it a valuable tool for businesses of all sizes. With its user-friendly interface and robust capabilities, Square POS is designed to enhance the overall customer experience while streamlining operations.

Discover how Keap can streamline your operations, automate everyday responsibilities, and enhance your lead conversion. Formerly known as Infusionsoft, Keap serves as a comprehensive CRM solution tailored for small businesses. This platform enables small enterprises to perform their tasks more efficiently and intelligently. By consolidating client details and daily activities into a single location, Keap liberates you from monotonous chores. All your leads, whether recent or established, are easily accessible together. You can retrieve client information anytime, from anywhere, ensuring you never miss a beat. With streamlined scheduling and quoting features, Keap alleviates the stress associated with securing new projects. In addition, you can monitor unpaid invoices and accelerate your payment processes. Build lasting connections by referring friends and enhancing your professional network, all while enjoying the benefits of a well-organized system. The transformation it offers can significantly boost your business's productivity and growth.

Experience payment processing without any merchant fees and no hidden charges with EzPay America. Our exceptional customer service ensures transparency, as we guarantee that there will be no undisclosed fees for merchant services or ACH payments. We recognize the frustration of receiving inflated statements, which is why we promise that our charges will never exceed zero, regardless of whether your monthly card processing is $5,000 or an impressive $5,000,000 annually. With us, you can say goodbye to merchant fees for good, and our cash discount programs are readily accessible across all states in the US. Not only do we not impose monthly fees, but we also provide a detailed monthly statement that highlights your savings compared to traditional service costs. Additionally, we believe that there should be no charges for closing out at the end of the business day, allowing you to batch as many transactions as you wish without extra costs. This feature exemplifies the numerous advantages of choosing EzPay America's innovative payment system for your business.