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Globally, there is a continuous increase in the number of cyberattacks by independent hackers and non-state actors. The European Union and the United States of America have recognized the importance of cyber security and cyber diplomacy for government institutions, companies and individuals. Coherence and synchronization between global cyber initiatives are needed to effectively increase cyber resilience and deter cyberattacks. The current paper conducts a comparative analysis of cyber diplomacy in the EU and the US with the aim of highlighting the best policies, diplomatic measures, frameworks and practices for increasing cyber resilience. It also identifies the institutions responsible in the EU vs. the US, compares the EU Cyber Diplomacy Toolbox and the US Cyber Diplomacy Act and identifies and compares preventive measures, cooperative measures, stability measures, restrictive measures and supportive measures. The aim is to outline the most fruitful and effective measures and to support homogenization at a global level.