Starbucks is the leading player in the global coffee market, with a 20.5% share of the $100 billion market. Other key players include Nestle (16%), Dunkin' Donuts (9%), and McCafe (6%). The company has a strong presence in key markets such as the US, China, and Japan. However, it also faces increasing competition from new entrants, such as specialty coffee shops, fast-food chains like McDonald's and Dunkin' Donuts, and premium tea brands. As a result, Starbucks is constantly innovating to stay ahead of the competition and maintain its leadership position in this dynamic market.