The issues of digital transformation and digital maturity have continued to be relevant over the past few decades. It is difficult to state that there is a universal digital maturity model (DMM) simultaneously applicable for organizations, industries, regions, and countries. We have tried to develop a universal DMM. It is based on the assessment of the digitalization level of the core business processes, including internal and external. The model includes 5 levels. We tested the DMM on 126 organizations. The results showed that 45% of the organizations belong to the second level ("partial digitalization"). The advantages of the model are simplicity of use, applicability for organizations of different sizes and forms of ownership, and a relatively high degree of objectivity. Further testing of the DMM will be aimed at assessing the level of the digital maturity of industries and regions.