Hellenic Telecommunications Organization SA, branded as OTE, is Greece’s incumbent telecommunications provider. Established in 1949 as a state monopoly, the company underwent gradual privatization beginning in the mid-1990s and today operates as a subsidiary of Deutsche Telekom AG. OTE’s services cover fixed-line telephony, broadband internet, pay television and digital solutions, catering to both residential and business markets throughout Greece.
Under the OTE umbrella, the COSMOTE brand delivers mobile communications and data services, including 4G/LTE and 5G networks, to millions of subscribers. The company’s fixed-line segment provides voice services, high-speed VDSL and fiber-to-the-home broadband, while its pay-TV division offers a range of platforms featuring linear channels, video-on-demand and over-the-top streaming options. Through its ICT arm, OTE offers cloud computing, data-center hosting, cybersecurity and managed network services to enterprises and public sector clients.
Beyond its domestic footprint, OTE maintains a presence in Southeastern Europe with operations in Romania, Bulgaria, Serbia and Albania. These regional subsidiaries extend the group’s service portfolio—encompassing mobile, fixed broadband and enterprise solutions—while leveraging shared infrastructure and technology platforms to deliver seamless communications across borders. The company invests in network upgrades and digital transformation projects designed to support emerging applications, from Internet of Things deployments to smart-city initiatives.
Leadership at OTE is headed by Chairman and Chief Executive Officer Michael Tsamaz, whose tenure has focused on streamlining operations, expanding next-generation networks and driving innovation through strategic partnerships. Supported by an executive committee overseeing finance, technology, marketing and regulatory affairs, the organization continues to pursue growth opportunities in both consumer and business segments as it adapts to shifting industry dynamics and evolving customer demands.
