The article analyzes the main types of oral and written communication on the material of different functional styles of the Ukrainian language. The research methodology consists of both the main methods of functional stylistics and its partial and concrete-practical methods, namely: functional, complex, semantic, comparative methods, multifaceted analysis and the method of direct observation. The purpose of the study is to determine the features of linguistic communication by means of the Ukrainian language on the example of official-business, epistolary and conversational-domestic styles in a comparative aspect. Achieving this goal involves a number of tasks: 1) to outline the features of construction, placement of details, language tools of business letters; 2) to study the structure and linguistic richness of Lesya Ukrainka�s letters; 3) identify typical and different linguistic and stylistic means of business and private letters; 4) analyze the features of messages transmitted using instant messaging programs Viber and Telegram; 5) to investigate the influence of gender on the features of language means of various forms of written communication. The role of Lesya Ukrainka is determined in expanding the communicative boundaries of the Ukrainian language, in particular on the metaphorization of speech, the introduction of vocabulary, which belongs to the spoken, dialectal or obsolete, in the texts of letters, which can serve as a model for restoring halfforgotten but extremely important for establishing trusting, friendly and warm interpersonal relationships, communication practices in the modern world. The author�s attitude to the use of feminism to denote positions, professions, titles is formed. Such innovations are not always motivated, because according to the new version of the �Ukrainian spelling� they are somewhat complicated in the way of creation. It has been proven that the main tool of communication is language, so it is extremely important for each communicant to master its culture in general and business communication in particular. Language is a kind of mirror of culture, which reflects not only the real world, but also the social identity of the people, its national characteristics, traditions, morals, value system and more. Language as a means of communication preserves cultural heritage in vocabulary, grammar, phraseology, in various forms of oral and written communication. In addition, it is a means of communication between generations, that forms a personality through a kind of vision of reality, embedded in the linguistic picture of the world, as well as transforms individuals into an ethnic group, creates a nation. Over the centuries of its existence, the Ukrainian language has created various forms of language units that serve to adequately convey information, preserving the national traditions of Ukrainian culture. Each functional style of the Ukrainian language has specific language tools for covering events and concepts depending on the circumstances of communication, its purpose, taking into account the characteristics of communicators. In general, the problem of generalization of Ukrainian language experience in both business and informal relations is solved, which is especially important in modern conditions of narrowing personal and expanding written forms of establishing and maintaining contacts at all levels of human relations, including official business and private correspondence.