A recently recognized superfood, the acai berry is related to the cranberry.

Acai berries and cranberries are both berries from the plant family, though they come from different regions - acai from Amazonian palms and cranberries from North American vines. They share similar nutritional profiles as antioxidant-rich fruits. While they're not closely related in botanical taxonomy (acai is a palm fruit, cranberry is a member of the Vaccinium genus along with blueberries), in the context of superfood discussions, they're often grouped together as antioxidant berry superfoods.