The exact number of coffee varieties in the world is difficult to determine precisely due to various factors such as genetic diversity, regional variations, and ongoing breeding programs. However, it's estimated that there are over 100 species of coffee plants, with the most well-known and commercially significant being Coffea arabica and Coffea robusta.
Within these species, there are numerous cultivars or varieties that have been developed through selective breeding for specific traits such as flavor profile, disease resistance, and yield. Some of the most popular cultivars include Bourbon, Typica, Caturra, Catuai, Gesha (or Geisha), SL28, and Pacamara, among many others.
Additionally, different coffee-growing regions around the world produce coffee with unique characteristics influenced by factors such as altitude, climate, soil composition, and processing methods. This diversity contributes to the rich tapestry of flavors and profiles found in the global coffee market.
Overall, while it's challenging to provide an exact count, the world of coffee is incredibly diverse and continues to evolve with ongoing research, cultivation, and exploration of new varieties and flavors.