The Czech Republic is actively involved in the European Open Science Cloud (EOSC) through its national e-infrastructures CESNET, IT4Innovations, and CERIT-SC. These three organizations are coordinating their resources and services to form a single national e-infrastructure called e-INFRA CZ. E-INFRA CZ provides distributed computing, storage, networking and other services to support research. It collaborates closely with other research infrastructures and is involved in several EOSC projects to help build and integrate the European Open Science Cloud.