This study aims to investigate the relationship between the revenues of Saudi telecommunication companies and online shopping. A quantitative methodology was adopted in achieving the study’s aims, where a questionnaire was distributed online among a sample of (300) managers and employees of the administrative units at the biggest three Saudi telecom firms STC, Mobily, and Zain. The collected responses were analyzed by SPSS 23 and the results showed the importance of e-commerce and the advantages and benefits it provides to its individual and corporate users, as it enables small businesses to compete in the international market easily, and helps companies to attract the largest possible number of customers easily and with low cost. The study also showed that there are many challenges and problems that Saudi customers face when using online shopping and limit the effectiveness of this process, most notably it relates to the threat to privacy and information security. The results showed the wide spread of online shopping services in Saudi telecommunication companies, as they rely on it to develop customer services and reach a competitive advantage. Finally, the study concluded that there is a statistically significant positive relationship between revenues of Saudi telecommunication companies and online shopping at a significant level of (α ≤ 0.05). The study recommended the necessity of telecommunication companies to develop their knowledge in online shopping and e-sale services so as not to miss important marketing opportunities and to achieve more profits and competitive advantage.