In this chapter, the benefits and drawbacks of WhatsApp in diplomatic settings are critically analyzed. On the positive side, WhatsApp facilitates real-time coordination, enables rapid decision-making, and strengthens informal ties between delegates. It also reduces physical constraints and allows more flexible, asynchronous participation. Linguistically, it gives non-native speakers the opportunity to translate and formulate responses without time pressure. However, the chapter also points out major concerns: the lack of formality may lead to blurred boundaries between personal and official communication; the app poses risks related to data security, confidentiality, and accountability. Furthermore, there are concerns about unequal access and digital exclusion, especially for smaller or under-resourced missions. Cultural and linguistic misunderstandings may arise due to the informal tone and lack of non-verbal cues. This balanced discussion offers insights into the real implications of incorporating WhatsApp into global diplomacy.