PreventionWeb is a platform for collaboration in disaster risk reduction information management. It aims to encourage knowledge sharing, provide a common platform for institutions to connect and share experiences, and facilitate direct interaction between stakeholders. PreventionWeb is owned by partners and stakeholders and facilitated by the UN International Strategy for Disaster Reduction. It provides virtual workspaces, discussion forums, and incentives for collaboration including access to knowledge bases and job opportunities. The platform includes national, regional, and civil society networks and is implemented through a blended approach including online and in-person interactions. Keys to the platform's success include effective moderation, broad participation, quality content, and flexibility to accommodate partners and stakeholders.