There are more than 129 species of coffee in the world. All of them originate from the Coffea genus plant. The most recognized species are Arabica, Robusta, Liberica, and Excelsa. Of these, Arabica is the most widely consumed and the highest in quality. Robusta is typically used more for instant coffee, coffee blends, and energy products.

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Within the Arabica species, there are more than 120 varieties, including Bourbon, Castillo, Colombia, and Geisha/Gesha..

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It is worth noting that coffee has so much in common with the world of wine. The same coffee variety, when planted in different regions of the world, will yield different flavors and profiles. For example, coffees from Latin America (e.g., Brazil, Colombia, Guatemala) are known for being clean and sweet, featuring notes of nuts, chocolate, and caramel, along with a moderate and pleasant acidity. Meanwhile, coffees from Africa (e.g., Ethiopia, Kenya) are recognized for their bright acidity and their floral and fruity notes—including blueberry and citrus—often accompanied by vinous nuances.

 

Even within the same country there are differences in flavor, profile and quality depending on the environmental factors (soil, climate, altitude, and rainfall). These factors shape the unique flavor profile of a coffee bean which in turn is associated with a specific origin. The factors influencing this are collectively known as *terroir*, and the resulting product is referred to as a *single-origin* coffee. Consequently, the very same coffee grown a mile away from another may possess a distinct flavor profile. To aid in distinguishing between them, the highest-quality coffees are accompanied by a cupping report detailing their flavor profiles and tracing their lineage back to a single specific farm or small-scale producer.

 

Large-scale (commercial) coffees, or those of medium to lower quality, do not carry this distinction.​

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Other factors that distinguish flavor include the cultivation process, harvesting method, type of fermentation, drying technique, and roasting style.

 

There are also countless methods for preparing coffee. Coffees that tend to be more acidic or bitter are often mixed with sweeteners (sugar) and creamers (milk) to balance the flavor. Higher-quality coffees, such as Specialty Coffee and Geisha varieties, are typically *NOT* served with added sweeteners or creamers, as the coffee bean itself naturally provides sweetness, flavor, and balance.

 

Worldwide, there are many methods of coffee preparation; for instance, in Indonesia, there is Kopi Luwak—a coffee that undergoes fermentation by passing through the digestive tract of a civet cat, a process that serves to reduce its bitterness. In Ethiopia, there is coffee with spiced butter: a brew prepared using spiced clarified butter (*niter kibbeh*).

 

In summary, coffee is exceptionally unique due to its immense chemical diversity, boasting over 800 aromatic compounds—a figure that actually exceeds that of wine. Its flavor is highly sensitive to its origin (including altitude and soil conditions), and it encompasses thousands of distinct varieties. Unique processing methods (such as washed, natural, or anaerobic techniques) and precise roasting further personalize its varied and complex flavor profiles.
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