All true tea, from the tea plant, contains some caffeine, but the caffeine levels vary widely from one individual to the next. Growing conditions, the cultivar of plant used, and the processing all influence the caffeine levels in the finished leaf.
The way you brew tea also influences the caffeine content of the brewed cup.
Although I do my best to give accurate info, this information is just my best estimate. Caffeine content can be highly variable; if you have a medical sensitivity, try a small amount of a given tea first, to be safe, or seek out a caffeine-free herbal tea.