For any of you who are on the fence when it comes to plant-based versus animal-based, this is a major gripe that people have with the former. Animal-based proteins, which contain whey, have all nine essential amino acids that are needed for humans to function. Because whey has all nine of these, it is considered a complete protein. Unfortunately, typically, plant-based proteins will miss one or two of these essential amino acids that are needed. Therefore, they are not usually labeled as a complete protein. This is not always the case but reigns true most of the time.
However, all you need to do is combine the protein powder with another. Thus, filling the nutritional gap left behind by a certain brand. Sure, it would be nice if all nine could be combined into one blend but that (most of the time) is one of the bigger drawbacks of plant-based.