The article considers the problem of forming the vector of economic development on the principles of sustainable development and social economy. State security is based not only on successful economic development, but also on maintaining a balance of social interests. Social entrepreneurship is contrary to social stratification and confrontation in society. As an empirical basis for this direction of development, the authors explore the segment of non-profit organizations with constant income and organizations providing services in the social sphere of Kazakhstan. In the absence of an official definition of social entrepreneurship, these types of socially oriented activities most fully implement the principles of sustainable development, while at the same time forming economic and social value. The results of a sociological study reveal the microscopic extent of this phenomenon in Kazakhstan, and the overwhelming array of respondents focuses on the system of institutional support for social entrepreneurship. The authors developed recommendations on the regulatory legal status of social entrepreneurs and the main directions of their institutional support. Particular attention is paid to the development of intersectoral and intra-sectoral ties in the development of social entrepreneurship. The emphasis is on the accelerator model, as the most productive form of support, which has a network nature and is based on coordination mechanisms between the state and non-state actors. The formation of a full-fledged institutional environment will ensure the stability and progression of the economic development of socially oriented activities and create a critical mass of entities acting on the principles of sustainable development in the unity of economic and social values of social development.