This comparative paper examines the role of social media in the "Chilean Spring" and in the "#YoSoy132" movement. First, it proposes a descriptive framework to approach both movements in a Latin American context. Second, paying special attention to the implosion of the movements. An analysis of the use of different online platforms (Facebook, Twitter and Youtube) is proposed. The results showed that in Chile social networks were "instrumental" while in Mexico were "decisive".