Abstract. Firms acquire external technological knowledge via different channels. In this paper, we compare the technology sourcing of foreign subsidiaries and domestic firms looking at domestic R&D outsourcing, international R&D outsourcing, domestic cooperation for innovation and international cooperation for innovation. We use data from the Spanish Technological Innovation Panel for the years 2005–2009 for 10,206 innovative firms operating in Spain. We apply a multivariate probit specification which allows for systematic correlations among the different choices. The results show that the different technology sourcing choices are interdependent and that foreign subsidiaries show a different pattern of external technology sourcing. Compared to affiliated domestic companies, foreign subsidiaries show a smaller propensity for external technology sourcing via R&D outsourcing from independent firms in the host country, for international R&D outsourcing and for international cooperation for innovation. In contrast, foreign subsidiaries show a greater propensity for domestic cooperation for innovation. However, foreign subsidiaries are not a homogenous group in this respect.