What is the best RF or Ultherapy for breast tightening?

Breast tightening
therapies do not work without skin excision. 
Many women refuse breast lifts because of the vertical scars associated
with the traditional techniques.  For
that reason, a new technique was developed called The Bellesoma Method.  This will reshape your breast tissue creating
upper pole fullness without implants, elevate them higher on the chest wall and
more medial to increase your cleavage. 
The weight of the breast is transferred to the underlying pectoralis
major muscle resulting in pain relief and long term stability.  Vertical scars are avoided, nipple sensation
and the ability to breast feed are maintained.           Best Wishes,Gary Horndeski, M.D.

Thanks for your question! If is difficult to answer without seeing photos/examining you. Speaking in broad terms, a scarless breast lift is best for women with smaller breasts (A and B cups). Radiofrequency skin tightening is a great way to tighten the skin of the breast, the "breast envelope." Make sure you consult with a board certified plastic surgeon and discuss:
-Bodytite with Morpheus to the breasts
-ThermiTight to the breasts
Good luck!

Non surgical breast lift has many advantages. It leaves no scars, it have a very low risk of complications. Specifically Non surgical breast lift does not risk loss of nipple or risk loss of nipple sensation. Non surgical breast lifts also does not interfere with future breast feeding. The transcutanous tightening technologies that Thermage and Ultherapy etc. just don't do enough to tighten the skin to give much of a breast lift. The slightly more invasive RF technology's life BodyTite and Renuvion give nice effective breast lift and still have all the advantages compared to open surgical breast lift.