Previous research has focused on message characteristics of public webcare conversations. However, webcare conversations are increasingly held on private social networking sites. Little is known to what extent organizations and stakeholders adapt their messages to the affordances of these channels. Employing the uses and gratifications theory, this paper reports on a content analysis of webcare conversations (n = 423) between stakeholders and the Netherlands Red Cross on public and private social networking sites. The stakeholder motives and organizational communication style were analyzed. The findings reveal private channels mainly serve the purpose of customer service: stakeholders approach the organization with questions; the organization uses message personalization to enhance the experience of one-to-one communication. Public social networking sites mainly serve the purpose of reputation management: stakeholders post remarks and compliments; the organization adapts the communication style of its messages to the affordances of the individual platform. Implications for theory and practice are discussed.