Ombre and balayage are both popular hair coloring techniques that create a gradient effect. The main difference between the two lies in the application process and the resulting appearance. Ombre involves a gradual transition from darker roots to lighter ends, creating a more defined and contrasting look. Balayage, on the other hand, is a freehand painting technique where the stylist applies color to specific sections of the hair to create a more natural, sun-kissed appearance with less noticeable regrowth lines.