One of the largest manifestations of the development of modern forms of interaction between organizations are industrial clusters, within which the state, industrial and scientific sectors unite. However, technology does not stand still – that is why digital technologies are actively being introduced into all spheres of our life. At the same time, industrial clusters are transformed into more developed forms of cluster-type ecosystems, including in various energy systems. Such changes are necessary for the successful conduct of business, because enterprises must be flexible and be ready to make changes to maintain their competitiveness in the market. Moreover, these changes are currently very relevant in terms of the application of the ESG development concept by enterprises. One of the tools for this is digital transformation, which ensures the formation of SMART cluster ecosystems. SMART cluster ecosystems in the energy sector are based on the introduction and development of digital platforms within which an enterprise can optimize certain business processes or completely transform them, depending on its goals, needs and resources. In the course of the study, the concepts of digital transformation and digital enterprise platforms, their advantages, stages of sustainable ESG development of SMART cluster ecosystems are considered. The topical issue of cluster-type ecosystems as a further stage of development of industrial clusters, their main advantages and limitations is considered. Models of digital transformation have been formed depending on the complexity and scale of the changes being carried out.