On average, a cup of tea contains 1/2 to 1/3 as much caffeine as a cup of coffee. However, with tea you can enjoy caffeine-free herbals, green and white teas that are light in caffeine, and even high-caffeine black teas (still less caffeine than coffee, though). two leaves tea company™ offers a full range of teas with a full range of caffeine, so that you can enjoy our tea no matter what your caffeine needs might be.