Electronic commerce is increasing every year as more and more potential customers are connected to the Internet. This brings serious challenges for online companies in areas such as, ordering infrastructure, inventory management, transportation and return logistics. This master thesis has been accomplished with cooperation of five companies, the department of industrial marketing and e-commerce and the department of industrial logistics. The main task of the thesis is to investigate if there are any differences in the logistic order fulfillment in companies that started their businesses directly online and companies that adopted online activities after first establishing an offline business. In order to answer the task the research will not only describe the order fulfillment process in the studied cases but also the authors view of the strategies and models used in each company are given and analyzed. The conclusion showed that the differences are not only bounded whether the company is purely online or acting in both online and offline commerce. Instead other factors such as size and the strategies chosen for the online activities are the crucial reasons for the similarities and dissimilarities between the studied companies.