ICT service providers

thumb|Tietoevry global headquarters in Keilaniemi, Espoo, Finland, since 2016. Keilalahdentie 2-4, Espoo. Tieto Corporation (natively Tietoevry Oyj, Tietoevry June 2019 to June November 2025) is a Finnish IT software and service company providing IT and product engineering services. Tietoevry is domiciled in Espoo, Finland, and the company's shares are listed on the NASDAQ OMX Helsinki, NASDAQ OMX Stockholm and Oslo Stock Exchange. Tietoevry has approximately 15,000 employees across 20 countries, and has customers in the energy, forestry, banking, healthcare and public sectors.

T-Systems International GmbH, trading as T-Systems, is an internationally operating service provider for information technologies and digital transformation. The company is part of Deutsche Telekom and is headquartered in Frankfurt am Main.

multinational telecommunications and data centre services company

Interoute Communications Ltd was a privately held telecommunications company that operated large cloud service platforms in Europe. On 23 February 2018, Interoute was acquired by GTT Communications for $2.3bn (€1.9bn); and the acquisition closed on 31 May 2018.

thumb|Bechtle's headquarters in Neckarsulm, Baden-Württemberg