United Internet AG functions as a comprehensive internet service provider, operating through its subsidiaries across four core segments: Consumer Access, Business Access, Consumer Applications, and Business Applications. For individual customers, the company delivers various connectivity options, including fixed-line broadband and mobile internet, often bundled with features like home networking, online storage, telephony, and IP-based television. Business clients are offered a range of telecommunications products, from dedicated fiber-optic connections to tailored ICT solutions, encompassing voice, data, and network services, as well as infrastructure support for both national and international carriers and ISPs.