| 1. Avedo Ströer Dialog Group (Ströer Dialog Group GmbH) in Leipzig |
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| 2. Bosch Service Solutions (Bosch Service Solutions GmbH) in Frankfurt am Main |
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| 3. Telus (Competence Call Center GmbH) in Berlin |
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| 4. Capita Europe (Capita Customer Services (Germany) GmbH) in Berlin |
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| 5. Concentrix (Concentrix Management Holding GmbH & Co. KG) in Osnabrück |
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| 6. Teleperformance (Teleperformance Support Services GmbH) in Dortmund |
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| 7. Sykes (Sykes Enterprises GmbH) in Bochum |
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| 8. Amevida (AMEVIDA SE) in Gelsenkirchen |
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| 9. DB Dialog (DB Dialog GmbH) in Berlin |
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| 10. KiKxxl (KiKxxl GmbH) in Osnabrück |
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Auswahl nach Branchen, Region und Firmengröße