This report provides a detailed analysis of the competitive strategies employed by two distinct companies: McDonald's and Atlassian. The report begins with an overview of McDonald's, a global fast-food chain, examining its cost advantage through low prices, convenient locations, and efficient processes, as well as its 'three-legged stool' business model involving franchisees, suppliers, and employees. It highlights McDonald's focus on standardization, quality, and adaptation to local markets. The report then shifts to Atlassian, an Australian software company, exploring its differentiation advantage through quality products at low prices, its focus on customer satisfaction, and its unique business model that prioritizes product excellence and online availability. It also discusses Atlassian's upside-down strategy of minimizing sales and marketing expenses. The report concludes by summarizing the key strategies and competitive advantages of both companies, providing insights into their market positions and business models.