Although business ecosystems are still at an immature stage of its development, they are regarded to be growing significantly when it comes to research and industrial practices. This mentioned immaturity or in other words an early stage of development is due to the lack of rigid analytical evidence and further insight causing it to be entirely conceptual. Subsequently, a lack of focus from the research point of view addressing the question of how companies can create or initiate business ecosystems while dealing with surrounding restrictions. Based on a multiple case study, this paper presents two archetypal development practices to help practitioners in the establishment of business ecosystems. Finally, it intends to several ways for future research on ecosystem complementors, the organisation and the role of start-ups in ecosystems.