Abstract : In this paper, we examine the contribution of the social Web in the events that led to the fall of the regime of Ben Ali in January 14, 2011. We take an interest in cyberactivism during the revolution for thinking about the ways of writing and archiving of the collective memory of Tunisia. In addition, the role played by cyberactivists through censored social platforms and websites is especially surprising in the sequence of events leading to the collapse considering how strong was the repression. We study the tools, methods and procedures of the actions carried out by cyberactivists to bypass repression, highlighting how in social events the Web acted as a relay of information, a catalyst of contestation and, since January 15, 2011, an outlet of the trauma of Ben Ali's fall. We also investigate about how coordination between the Web and the street took place in the mobilization of the protest. Finally, we reflect on the changing role of online activists in post-revolutionary Tunisia and the need to redefine their roles, their speeches and their goals. The debate about reclaiming the public sphere, a watermark of our analysis, permits to observe how the reconstruction process is at work. The learning of democratic public debate takes place in a context charged with conflict, tension and disagreements of various kinds.