The purpose of this paper is to challenge some of the cornerstones of Grounded theory and propose an extended alternative approach for data analysis and theory development, which we call multi-grounded theory (MGT). A multi-grounded theory is not only empirically grounded. Three different grounding processes are acknowledged: Theoretical, empirical and internal grounding. We go beyond the pure inductivist approach in GT and add the explicit use of external theories. A working structure of MGT is presented, which can be seen as an extension of Grounded theory.