What Does United Internet AG Do?

Total employees381
HeadquartersMontabaur
Founded1988

United Internet AG is a leading European internet specialist. The company's activities are divided into two segments: Access and Applications. The Access segment includes paid DSL and mobile internet products, including the corresponding applications (telephony, IPTV, video-on-demand). The Applications segment comprises ad-financed and fee-based applications such as domains, web hosting, cloud solutions, group work, online storage, and office software, as well as ad-financed applications like GMX and WEB.DE. Key brands include 1&1, IONOS, GMX, WEB.DE, STRATO, Arsys, Fasthosts, home.pl, InterNetX, Sedo and World4You.

Where Is United Internet AG's Headquarters?

United Internet AG officeUnited Internet AG officeUnited Internet AG officeUnited Internet AG office
*Images sourced via web search. Rights belong to original owners

HQ Function

Serves as the central hub for strategic management, corporate governance, financial control, and group-wide administrative functions for United Internet's diverse portfolio of internet brands.

Notable Features:

The Montabaur campus is known for its modern architecture and expansive facilities, designed to foster innovation and collaboration. It often features green spaces and employee amenities reflecting a contemporary work environment.

Work Culture:

The work culture at the Montabaur HQ is typically characterized by German efficiency combined with a dynamic tech-industry mindset. Emphasis is placed on performance, innovation, employee development, and cross-functional teamwork.

HQ Significance:

The Montabaur headquarters is significant as the nerve center of one of Europe's largest internet companies, coordinating operations and strategy for millions of customers across its various brands.

Values Reflected in HQ: The headquarters' design and operations reflect values such as innovation, customer focus, technological leadership, and long-term strategic planning.

Location:

United Internet AG primarily operates across Europe, with a strong focus on Germany. Its global reach is significantly extended through its web hosting and cloud services brand, IONOS, which serves customers in numerous countries including the USA, UK, Spain, France, Canada, and Italy. The company's Access division (telecommunications) is mainly concentrated in Germany, while Application services (email, domains, hosting) have a broader international footprint.

Street Address:

Elgendorfer Straße 57

City:

Montabaur

State/Province:

Rhineland-Palatinate

Country:

Germany

Where Else Does United Internet AG Operate Around the World?

Karlsruhe, Baden-Württemberg/Germany

Address: Brauerstraße 48, 76135 Karlsruhe, Germany (Example for 1&1 IONOS SE)

Serves as a key technology and innovation center within Germany, leveraging the strong IT talent pool in the Karlsruhe region. It's crucial for serving the German and broader European market.

Munich, Bavaria/Germany

Address: Sapporobogen 6-8, 80637 München, Germany (Example for 1&1 Mail & Media GmbH)

Strategic location for media operations and accessing talent in Southern Germany. It also serves as a key point for partnerships and business development in the region.

Chesterbrook, Pennsylvania/USA

Address: 701 Lee Rd, Suite 300, Chesterbrook, PA 19087, USA (IONOS Inc. US Headquarters)

Key hub for expanding web hosting, domain registration, and cloud services in the North American market, tailoring offerings to local needs.

Buying Intent Signals for United Internet AG

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Who's Leading United Internet AG? Meet the Executive Team

As of April 2025, United Internet AG' leadership includes:

Ralph Dommermuth - Chief Executive Officer (CEO) & Founder
Martin Mildner - Chief Financial Officer (CFO)
Markus Kadelke - Chief Financial Officer (CFO) 1&1 Mail & Media Applications SE & Management Board United Internet AG
Hüseyin Dogan - Chief Executive Officer (CEO) IONOS Group SE & Management Board United Internet AG
Dr. Martin Endress - Chief Customer Officer (CCO) 1&1 AG & Management Board United Internet AG

Who's Investing in United Internet AG?

United Internet AG has been backed by several prominent investors over the years, including:

Ralph Dommermuth (via United Internet Investments Holding GmbH & Co. KG and other entities - major shareholder)
Various institutional investors
Retail investors (publicly traded on Frankfurt Stock Exchange)

What Leadership Changes Has United Internet AG Seen Recently?

Hire2
Exits0

United Internet AG and its key subsidiaries have seen some strategic appointments and transitions in their management boards over the past year, reflecting ongoing development and focus in key business areas.

New Appointments:

Markus Kadelke, Markus Kadelke was appointed to the Management Board of United Internet AG, effective November 1, 2023. He continues his role as CFO of 1&1 Mail & Media Applications SE.
Dr. Martin Endress, Dr. Martin Endress was appointed to the Management Board of United Internet AG, effective January 1, 2024. He continues his role as Chief Customer Officer (CCO) of 1&1 AG.

What Technology (Tech Stack) Is Used byUnited Internet AG?

Discover the tools United Internet AG uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

United Internet AG Email Formats and Examples

United Internet AG and its subsidiaries (like IONOS, 1&1, GMX, WEB.DE) typically use standardized email formats. The most common patterns are [first_initial][last_name] or [first_name].[last_name] followed by the respective company domain (e.g., @united-internet.de, @ionos.com, @1und1.de).

f.lastname@united-internet.de (e.g. j.doe@united-internet.de), firstname.lastname@united-internet.de (e.g. jane.doe@united-internet.de)

Format

r.dommermuth@united-internet.de

Example

80%

Success rate

What's the Latest News About United Internet AG?

United Internet AG • May 14, 2024

United Internet AG news title: United Internet confirms preliminary figures for Q1 2024 and guidance for FY 2024

United Internet AG announced its results for the first quarter of 2024, confirming previously released preliminary figures. The company also reiterated its financial guidance for the full fiscal year 2024, indicating stable growth expectations....more

Telecompaper • April 2, 2024

United Internet AG news title: 1&1 starts marketing fixed wireless access in Berlin

United Internet's subsidiary 1&1 has begun marketing its 5G-based Fixed Wireless Access (FWA) services in Berlin, expanding its home broadband offerings with high-speed wireless internet....more

IONOS Group SE • February 20, 2024

United Internet AG news title: IONOS strengthens AI offering with investment in Stackable

IONOS, part of United Internet, announced an investment in Stackable GmbH, a data platform specialist. This move aims to enhance IONOS's AI capabilities and provide customers with advanced data management and AI solutions....more

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