Abstract The spread of revolutionary ideas reconfigured the machinery of surveillance within the Habsburg state between the Jacobin Trials of 1794 and the Congress of Vienna in 1815. The Habsburg Ministry of Police emerged from the Jacobin Trials with enlarged administrative capabilities, including a new relationship between the secret state police and the military and the increased surveillance of urban working populations. Not only that, but the period also witnessed a push to monitor subversive political activity in foreign territory, including Poland, the Ottoman Empire, the German states and Italy. This article argues that cooperation among European states in the policing of subversive political activity across borders antedated the Congress of Vienna. A focus on these critical decades questions the viability of the ‘Metternichian System’ and points instead to a growing security apparatus that Metternich sought to further internationalize after 1815.