The world energy demand is still increasing, even though the Covid-19 pandemic had a negative effect on the growth. As a result, despite the lower pace, CO2 emissions are still growing. In this scenario, renewable energy sources play a crucial role in empowering the energy transition. Among renewable energy sources, marine energy and in particular sea waves possess a huge potential. The total world potential of wave energy is estimated to be around 29500 TWh/year, more than the current world electricity demand. There is a lot of research going on, as a result the technologies exploiting wave energy are constantly evolving and growing.