The last five years have seen a global surge in political fact-checking, reporting that specializes in debunking political misinformation. A growing occupational movement, originating in the United States but increasingly international in scope, has sought to legitimize fact-checking as unbiased journalism, to establish common standards and practices, and to secure reliable funding for this emerging genre. As a genuinely transnational professional movement which includes practitioners from multiple journalistic cultures as well as other fields, fact-checking offers a new site to consider whether and how professional journalism is meaningfully becoming globalized. This paper models a novel approach to mapping a diverse organizational landscape in terms of institutional ties to the fields of journalism, academia, and politics. Drawing on fieldwork from two international gatherings of fact-checkers, I array fact-checking outlets on a ternary graph and review their competing understandings of the mission, the target, and the practices of fact-checking. I highlight areas of convergence as well as divergence in this organizational milieu, focusing particular attention on boundaries not drawn-the willingness of professional journalists in this global movement to share jurisdictional authority with non-journalists. I conclude with suggestions for a comparative research agenda focused on this emergent area of practice.Journalism Studies, 2016 http://dx.