The purpose of this study is to assess the efficiency performance of high-technology exports. The empirical analysis uses the sample of selected South East Europe (SEE) and European Union (EU) countries in the year 2017. To provide the empirical evidence, we have used the data envelopment analysis (DEA). Our study does not only evaluate the performance of the countries of interest, but also aims to explain the differences in the efficiency scores. For this purpose, it uses Tobit regression. The findings of DEA analysis suggest the relatively small countries to be efficient. With regards to Tobit regression, exports share is found to have a direct positive link with the efficiency scores obtained from DMUs whereas the coefficient with The Global Innovation Index (GII) is not found to be significant.