Tea

• The final caffeine level of a batch of tea is determined by a variety of outside processes such as fermentation as well as the length of brewing time. According to the Asian Food Information Center, natural tea leaves contain more caffeine than coffee beans, so in terms of amount by weight, tea contains more caffeine.
  
  

Coffee

• Coffee is rightfully considered a go-to drink when people are looking for a jolt of caffeine and energy. The amount of caffeine in a cup of coffee is greater than that of a cup of tea because more coffee beans are needed than tea leaves to brew the same amount of liquid.