Creating ideas and having an innovative environment in an organization are crucial regarding gain a competitive advantage. People would utilize community of inquiry (CoI) to boost innovation through tacit knowledge sharing processes which they can learn collaboratively. Social presence, cognitive presence, and teaching presence are considered as dimensional aspects in CoI that could help an effective and efficient collaboration learning. However, the issue of personal identity is deemed to be a barrier due to knowledge sharing. The hidden contributor in a forum discussion can be seen as a way to avoid bureaucracy, conflicts, or the fear of critics. According to the case, the presence aspects within CoI could potentially provide people to have an anonymous identity. This paper proposes anonymity tool of CoI-based platform and evaluates the impacts regarding the element of social presence and cognitive presence. We analyze the tool by developing CoI-based prototype and assess participants' perspectives using an exploratory qualitative study in Pusilkom Universitas Indonesia. Findings of this research stated that anonymity has high influence on the aspect of social presence in sharing while anonymity has low influence on the cognitive aspect of CoI-based knowledge sharing in the organization.