Vyapar is a SaaS solution for small businesses that offers accounting, invoicing, inventory management, online store management, and client management. It is GST compliant and offers features such as online payment gateway integration, expense management, bank management, and multiple reports. It also supports bar-code generation, bill wise payment, and stock tracking based on serial number, exp. date, mfg date, batch number, etc. Other features include order and estimate management, loan account, e-way bill generation, and multiple device synchronization in real time.