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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.
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.
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.
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.
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.
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.
Elgendorfer Straße 57
Montabaur
Rhineland-Palatinate
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.
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.
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.
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As of April 2025, United Internet AG' leadership includes:
United Internet AG has been backed by several prominent investors over the years, including:
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.
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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
United Internet AG • May 14, 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'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
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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