This study examines the communication of the State Security Department of the Republic of Lithuania and the Second Investigation Department under the Ministry of National Defence in 2012–2022. It identifies the aspects relevant to the strategic communication of the intelligence services, analyses specifics of the texts and tendencies in national threat assessments and activity reports, and examines how these institutions present themselves. The study applies the theory of securitisation and critical discourse analysis. It includes other research related to the topic, practices of foreign intelligence services in publishing annual reports and using the YouTube social media platform, media publications and other sources. The study concludes that strategic communication for intelligence agencies is essential for the long-term success of their operations. By focusing on strategic objectives, they inform and educate the public about themselves and national security and develop a cooperative relationship, contributing to deterrence. Both institutions examined in this study are becoming not only formally more open to the public, but also aim to build and maintain a high institutional reputation, connect with their audience and create an image of professionalism, modern accountability and openness to the public.