Offshore Service Providers (OSPs) have been a subject of research for several years now. However, there is little known about what drives the internationalization of OSPs. In this paper, we combine insights from economic geography and institutional view to investigate cluster presence and quality certification as the drivers of OSP internationalization and their performance. We hypothesize the facilitating role these two factors play in driving the performance of internationalized firms. We test our hypotheses using data from Indian software firms between 1992 and 2002. We find a positive effect of certification on OSP internationalization. Although certification contributes negatively to OSP performance, it positively moderates the performance effect of OSP internationalization. Cluster presence was found to drive OSP's overall performance, but has no effect on internationalization. Through our findings, we contribute towards the literature on OSP internationalization.