Threat perception constitute a filtered interpretation and construction of an ongoing or forthcoming event, moreover, previous research shows that fundamentally different countries also react differently to seemingly similar threats. Hence, it seems puzzling that Sweden and Finland, two nations with many similarities, seem to express the hybrid threat in different ways. Based on primary sources, drawing on Alastair Ian Johnston's theory, this comparative case study uses strategic culture to explain the variation between Sweden and Finland in relation to the hybrid threat perception. The result demonstrates that the Swedish and Finnish strategic culture, both with different characteristics, in turn seem to influence how Sweden and Finland express the hybrid threat. The result of the study constitutes an important contribution to war studies since the understanding of both the complexity of threat perception, and the strategic culture of different countries, can provide insights into the underlying factors for countries' strategic choices.