The paper comparatively examines the role of Diaspora in the integration paths of two post-Soviet Eastern European states, Armenia and Moldova. Both countries are members of Eastern Partnership and share some common situati-ons with their Diasporas that are increasing their role on the foreign policy of their homelands. Both countries were supposed to sign Association agreement and DCFTA with the EU, while Moldova signed, but Armenia didn‟t, announ-cing its U-turn intention to join the Russian led Customs Union and to partici-pate in the formation of the Eurasian Economic Union. The paper goes beyond the reasons of the integration choices of these countries. The main reflections are oriented on the issue of the Diasporas‟ influence on the integration choices and its implications for the Diaspora communities. Thus, the research is conce-ntrated on the study cases of Armenian and Moldovan Diasporas, as foreign po-licy assets in the host land-homeland relations. This issue can be better unders-tood by setting its study within the shared theoretical framework of constructi-vism and liberalism: both constructivism and liberalism are likely to explain the impact of both identity and domestic activities on international sense.