The research examines the economic impacts of adopting sustainable last-mile delivery technologies in the EU, using an input-output analysis. The research focuses on technologies used by postal and courier companies (CPA H53) across different EU countries. The aim is to model the economic effects on other industries if the existing sustainable technology is applied instead of the existing. Germany, France, Sweden, the Netherlands, and Denmark have greener Postal and courier services (CPA H53), utilizing more Telecommunications (CPA J61), Computer programming (CPA J62_J63), and Warehousing services (H52) compared to Latvia, Estonia, and Lithuania, where rival services (H53) are more prevalent. Poland was considered but rejected due to data confidentiality as too few companies operate. The modelling results of regional technological convergence claim that if the companies overtake the existing technology in another country, then, in the case of Latvia, if the technologies applied in Estonia are overtaken, then the existing demand results in larger sectoral output (0.1%), largest decline is for Services auxiliary to financial and insurance services (K66) (-10.5%). However, if the companies in Latvia overtake the existing Lithuanian technology, it results in smaller and more efficient economic activity (-0.1%), and less Services auxiliary to financial services (-10.9%), and air transport (-4.7%), but demands more paper production (+4.6%) and Printing services (+4.1%). The findings are valuable for the national and EU policymakers to assess the potential impacts of technological convergence in regions partially facilitated by the European Green Deal.