inform.cz/en/ - Inform net partners _ databases of Czech businesses

edb.eu/czech-companies - The European Databank, Czech & Slovak firms

hbi.cz - Hoppenstedt Bonnier, online database of Czech and Slovak companies

cz.kompass.com/en - Kompass - Czech B to B company search engine

exporters.czechtrade.co.uk.../ - Czech Exporters Directory Official database of CzechTrade, the National Trade Promotion Agency