What is Invoicing Software? If your system of invoicing is still manual, you are missing the ease, accuracy, and automation of invoicing software. It’s time to discover the power of invoicing software! Invoicing software is a totally digital solution designed and developed to automate and streamline the routine invoicing work for small businesses and freelance professionals. It is a perfect invoicing mentor for people who want to focus on growth rather than getting entangled in only administrative work all day long.