Wikipedia is a website that conveys knowledge in a global perspective. It is an open platform where everyone participates voluntarily and is based on the common vision of gathering all the world’s knowledge. Through free knowledge, more people can learn and share information about the challenges we face. The basis for sustainable development is participation and equality. There are over 300 language versions of Wikipedia and it is estimated that over 200,000 people edit each month on one of the projects. The platforms are designed and developed for global collaboration. It is thus possible to reach many people through collaborations across country and language borders. For libraries, it is another way to be seen as part of an ecosystem of knowledge. To be relevant on a platform where more people can add and contribute with more perspectives. What advantages are there for libraries to operate on Wikimedia’s platforms? What happens if we choose to stand outside?