The goal of this article is to inform practitioners and researchers alike about the emerging practice of collaboratively mapping alternative economies. The paper draws from an inventory of over 200 maps, action research, and semi-structured interviews to explore how collaborative mapping – a practice that is largely citizen-driven – may be leveraged for the co-production of (scientific) knowledge about alternative economies. An array of real and ideal types is proposed in order to help navigate the various dimensions of collaborative mapping. Four lines of discussion are proposed: (1) what can we learn from maps when reframed as mappings – as processes? (2) How performativity may bring light to evaluating the transformational nature of knowledge derived from collaborative? (3) How does collaborative mapping offer avenues for rethinking empowerment of citizens in producing knowledge about alternative economies? And, (4) what new challenges are emerging from acknowledging digital knowledge as a commons?