What Causes Frequent Defecation And Soft Stool?

Why is my poop alway super soft? It either is like diareah or, if it has some shape to it, it's still very soft like poofy clouds. And I poop often. I feel like I always have to poop. I'm vegan. Am I just not eating enough poop binding foods? It's been this way dor a long time. I want firm rare poop.