Authoritarian states and democracies have long used propaganda and disinformation to manipulate target audiences. Recently interest in this issue has increased, especially as active pro-Kremlin disinformation measures have targeted the Nordic countries. So far, research on disinformation measures in a Nordic context is limited and focuses mainly on how individual countries have been exposed, or how disinformation in regard to a particular and debated issue have affected the debate in individual countries, while research is lacking on how Nordic countries organize themselves and work to identify and counter such threats ina comparative perspective. This comparative case study uses qualitative analysis of literature, policy documents and interviews with expert practitioners to show that Sweden and Finland have established and tested organizations and networks to identify and counter disinformation campaigns. Similar institutionalization is now underway in Denmark and Norway. The states inspire each other and participate in international collaboration. But how the countries participate in such collaboration varies and, moreover, has bearing on their vulnerability in facing the threat.