The article presents a comparative analysis of enterprises from EU countries that use the opportunities offered by the digital economy in its activity (enterprise resource planning software, e-invoices, web site, etc.). The article also exposed some business difficulties for the development of electronic markets within the European Union countries: tax, customs and transport difficulties, differences between countries in the legal framework, fragmentation in the industrial sector, difficulties of small businesses, insufficient marketing strategies, differences in culture and language. The article also defined priorities for activity to remove barriers in the development of digital markets.