The World Wide Web has become an important platform for delivering services in the last decade. Openness and flexibility are indeed key factors for the success of the Web where end-users develop applications freely. As a consequence, end-users become producers and consumers of contents and services. End-users rely for their communication needs on communication platforms (CPs). CPs managed by Service Providers lack sufficient openness and flexibility for end users due to their own complexity. This paper examines the CPs from the perspective of openness and flexibility for end-users, and then proposes a novel concept, My Own Communication Service Provider (MOCSP). The key innovation is to provide an individual CP for an end-user for his/her communication services. To achieve this goal, we design a MOCSP system, based on a top-down and user-centric approach. Moreover, we analyse our approach in terms of benefits for end-users