Israeli startup SofWave Medical is developing non-invasive ultrasound technology for skin tightening. It targets specific layers of skin to reduce wrinkles and has received CE (European) approval. SofWave has just raised $8.4 million of funding.
https://alon-medtech.com/portfolio/
https://www.calcalistech.com/ctech/articles/0,7340,L-3767858,00.html