Billionaire Profile
Ralph Dommermuth
Global Rank
#1462

Image: Public domain | via Wikimedia Commons

Ralph Dommermuth

CEO, United Internet AG
DE
Real-Time Net Worth
$3.4B
As of December 2025
Age
62
Source
Internet service provider
Industry
technology
Citizenship
DE

Biography

Ralph Dommermuth, born in 1963, is a prominent German businessman best known as the founder, chairman, and CEO of United Internet AG. He is recognized as a pioneer in Germany's internet industry and is often referred to as "Mr. Internet." Dommermuth's career began after an apprenticeship at Deutsche Bank, and he later transitioned into the tech sector. His source of wealth stems from his vision in establishing United Internet, a leading European internet specialist providing a wide range of services. With an estimated net worth of $3.4 billion, Dommermuth has solidified his position as one of Germany's wealthiest individuals.

Wealth Over Time

In-Depth Profile

Early Life

Ralph Dommermuth was born in 1963 and raised in Montabaur, Germany, as the son of a realtor. After training at Deutsche Bank, he began working as a sales freelancer for a local PC dealer in 1983.

Rise to Success

Dommermuth's entrepreneurial journey began in 1988 when he co-founded 1&1 EDV Marketing GmbH with a business partner. The company initially offered marketing services for software companies and later expanded to include internet service provision. In 1996, 1&1 transformed into an internet service provider. The company went public in March 1998, becoming the first German internet company to be listed. This success led to Dommermuth renaming the company United Internet, which expanded its offerings and customer base significantly. Today, United Internet is a leading European internet specialist.

Key Business Strategies

Dommermuth's strategic vision includes a focus on the growth of United Internet through acquisitions and innovation. His leadership was key in securing the company's participation in the 5G frequency auction in Germany, laying the groundwork for a fourth mobile network. United Internet has also focused on expanding its services to include mobile telecommunications and data centers, ensuring the company's continued relevance in the fast-evolving tech landscape.

Philanthropy

Dommermuth has also contributed to charitable causes through the United Internet for UNICEF foundation. He also supports democratic causes through the Westerwelle Foundation.

Career Milestones

1983

Began Career

Started as a sales freelancer for a local PC dealer after an apprenticeship at Deutsche Bank.

1988

Founded 1&1 EDV Marketing GmbH

Co-founded the company, which later became United Internet.

1998

IPO of 1&1

Took the company public, making it the first German internet company on the Neuer Markt.

2000

Restructured 1&1 into United Internet AG

Renamed the company to reflect its expanded business scope.

2018

CEO of 1&1 Drillisch AG

Assumed the role of CEO.

Philanthropy & Social Impact

Children's Welfare

United Internet for UNICEF

Undisclosed

Supports children's welfare.

Democratic Causes

Westerwelle Foundation

Undisclosed

Supports democratic causes.

Business Philosophy & Leadership

Notable Quotes

"In my office, presentations are not allowed. A good idea fits into a beer coaster."

Leadership Principles

Focus on Innovation

Prioritizing the development of new services and technologies to stay ahead in the market.

Operational Excellence

Striving for high performance and efficiency across all operations.

Strategic Expansion

Growing the company through strategic acquisitions and partnerships.