Yes, tea contains caffeine. The amount of caffeine included in tea leaves varies based on the type of tea and the method used to make it. While often less caffeinated than coffee, caffeine is still present in tea. The type of tea plant, the manner of processing, the amount of time spent brewing, and the temperature of the water can all affect how much caffeine is present in tea. Herbal teas, such as chamomile, peppermint, and rooibos, are often caffeine-free or contain very low levels of caffeine. However, herbal "tea" is technically not derived from the Camellia sinensis plant like traditional teas (black, green, white, and oolong) are.