Addsum Business Software is a provider of business software solutions designed primarily for small to mid-sized businesses. The company offers comprehensive software packages that focus on accounting, inventory management, payroll, and point-of-sale operations. Their flagship product, Addsum Advanced Accounting, is known for its robust features tailored to meet the diverse needs of various industries. In addition to their software offerings, Addsum provides customization, support, and consultancy services to aid businesses in optimizing their operations through technology.