NGOS are willing to present themselves as key actors whose involvement in the decision making process would ensure consideration of populations' expectations. We wondered if they pushed their ideas in international fora accordingly with the principles developed by deliberative democrats, some of whom present NGOs as the mainspring of deliberation at a large scale. To answer this question, we studied the way NGOs (at least the most powerful among them) push their ideas towards international organizations in order to influence their resolutions. Methodologically speaking, we focused on public policy network analysis to be able to identify a group of principle-based NGOs following a common strategy. To complete this analysis, we realized 30 semi-directive interviews and studied 300 press releases. For each of the three organizations we analysed (WTO, WHO, WIPO), we tried to specify the context and the circumstances in which NGOs' activities leaded to an institutionalization of their ideas. We concluded that influential NGOs behave more as interest group and pluralist democrats than as deliberative ones. They contribute to implement international decision making's transparency. In certain cases, they are also able to shape political agendas. At a more general level, this study points out INGOs' advocacy activities and shows the differences in IGOs'openess towards private actors.