E-commerce refers to buying and selling online. E-business encompasses all business conducted online.
E-commerce is concerned with the firms dealings with its customers, clients or suppliers. E-business refers to undertaking industry, trade and commerce with the help of information technology and communication.
E-commerce includes transactions which are related to money. E-business includes monetary as well as allied activities.
E-commerce requires a website that can represent the business. E-business requires a website, customer relationship management, enterprise resource planning for running the business over the internet.
E-commerce sales can include every element of a sale- ordering a product, paying for a product and having it delivered. E-business includes email marketing, inventory management and content management, online tools like human resources, online job boards, application processers and systems that collect and maintain data about employees.