GMX
GMX is a German-based web portal and email service provider originally founded in 1997. It is currently a subsidiary of 1&1 Mail & Media GmbH, which is part of the publicly traded United Internet AG group headquartered in Germany.
Brand Identity Data
HQ Country
Germany
Founded
1997
EU Headquartered
Yes
EU Manufactured
Yes
Ownership Type
public
Stock Exchange
Xetra
Tax Domicile
DE
Ultimate Parent
United Internet AG
Data Hosting
DE
CLOUD Act Exposure
No ✓
GDPR Status
compliant
Carbon Neutral
true
B Corp Certified
No
Repair / Recycling
No
Ethical Certifications
None verified
Verified on October 15, 2026
Corporate Lineage
1997
Company founding
GMX was established as Global Message Exchange in Munich, Germany.
2000
Acquisition by United Internet
United Internet AG acquired GMX and integrated it into its portal business.