Voluma vs Sculptra
The only other product that rivals Voluma is Sculptra, though the action is very different. Voluma will provide instant results and will provide volume by presence of the material itself.
Sculptra causes a bio-stimulatory response which spurs your body to produce new collagen so the end results are not product, but your own collagen. The choice of which filler to use will be a personal choice and the recommendations of Dr. Both products provide very customized levels of volume restoration/replacement.