Top 10 Telecommunications Companies in Germany 2025

We’re tracking 12,321 Telecommunications companies in Germany.

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Companies	Employees	HQ location	Revenue	Founded	Estimated Traffic	Industries
Deutsche Telekom	View 17,709 employees	🇩🇪 North Rhine-Westphalia, Bonn+49	$ >1000M	2015	63,939,998	Communications Infrastructure, Telecommunications
Leoni	View 10,111 employees	🇩🇪 Bayern, Nuremberg+123	$ >1000M	1917	51,400	Telecommunications, Electronics
Cancom	View 1,729 employees	🇩🇪 Bavaria, Munich+5	$ >1000M	1992	419,421	Information Technology, IT Infrastructure
Deutsche Telekom	View 2 employees	🇩🇪 Nordrhein-Westfalen, Bonn+5	$ 500-1000M	2020	105,696,002	ISP, Internet
Marquardt	View 3,185 employees	🇩🇪 Baden-Wurttemberg, Rietheim-weilheim+53	$ 500-1000M	1925	128,960	Telecommunications, Mobile
Rosenberger Group	View 1,413 employees	🇩🇪 Bayern\|Oberbayern\|Berchtesgadener Land, Fridolfing+45	$ 500-1000M	1958	95,016	Electronics, Manufacturing
TeleTrusT	View 3 employees	🇩🇪 Berlin+2	$ 500-1000M	1989	37,653	Information Technology, Information and Communications Technology (ICT)
BSN Medical	View 1,149 employees	🇩🇪 Hamburg+13	$ 500-1000M	2001	19,759	Internet, ISP
TransnetBW	View 856 employees	🇩🇪 Baden-Wuerttemberg\|Stuttgart\|Stuttgart, Stuttgart+1	$ 500-1000M	1998	52,337	Energy, Infrastructure
Lichtgitter Group	View 61 employees	🇩🇪 North Rhine-Westphalia, Stadtlohn+32	$ 500-1000M	1929	35,573	Telecommunications
Deutsche Telekom	View 17,709 employees	🇩🇪 North Rhine-Westphalia, Bonn+49	$ >1000M	2015	63,939,998	Communications Infrastructure, Telecommunications
Leoni	View 10,111 employees	🇩🇪 Bayern, Nuremberg+123	$ >1000M	1917	51,400	Telecommunications, Electronics
Cancom	View 1,729 employees	🇩🇪 Bavaria, Munich+5	$ >1000M	1992	419,421	Information Technology, IT Infrastructure
Deutsche Telekom	View 2 employees	🇩🇪 Nordrhein-Westfalen, Bonn+5	$ 500-1000M	2020	105,696,002	ISP, Internet
Marquardt	View 3,185 employees	🇩🇪 Baden-Wurttemberg, Rietheim-weilheim+53	$ 500-1000M	1925	128,960	Telecommunications, Mobile
Rosenberger Group	View 1,413 employees	🇩🇪 Bayern\|Oberbayern\|Berchtesgadener Land, Fridolfing+45	$ 500-1000M	1958	95,016	Electronics, Manufacturing
TeleTrusT	View 3 employees	🇩🇪 Berlin+2	$ 500-1000M	1989	37,653	Information Technology, Information and Communications Technology (ICT)
BSN Medical	View 1,149 employees	🇩🇪 Hamburg+13	$ 500-1000M	2001	19,759	Internet, ISP
TransnetBW	View 856 employees	🇩🇪 Baden-Wuerttemberg\|Stuttgart\|Stuttgart, Stuttgart+1	$ 500-1000M	1998	52,337	Energy, Infrastructure
Lichtgitter Group	View 61 employees	🇩🇪 North Rhine-Westphalia, Stadtlohn+32	$ 500-1000M	1929	35,573	Telecommunications

1. Deutsche Telekom

Deutsche Telekom, headquartered in Germany, stands as a titan in the telecommunications industry, specializing in a variety of services including broadband, mobile communications, and digital solutions. The company is known for its innovative drive in pioneering 5G technology across Germany, enhancing connectivity and setting new standards in digital infrastructure. Deutsche Telekom prides itself on its extensive network and strategic partnerships, aimed at redefining the digital landscape of Germany and improving user experience across Europe. Their commitment to advancing technology consistently delivers efficient and reliable service solutions to businesses and consumers alike.

Location 🇩🇪 North Rhine-Westphalia, Bonn	Size View 17,709 employees
Revenue $ >1000M	Industries Hardware, Internet Services, Messaging and Telecommunications
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2. Leoni

Leoni, headquartered in Nuremberg, Germany, is a prominent player in the global telecommunications industry. Specializing in the development of cables, systems, and related services for applications in various sectors including automotive, healthcare, and telecommunications, Leoni stands out with its profound expertise in providing high-tech solutions for data and energy transmission. Leoni’s significant presence in the German market underscores its commitment to delivering state-of-the-art connectivity solutions, tailored to the evolving demands of modern businesses and infrastructures in Germany.

Location 🇩🇪 Bayern, Nuremberg	Size View 10,111 employees
Revenue $ >1000M	Industries Hardware, Consumer Electronics
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4. Deutsche Telekom

Deutsche Telekom, headquartered in Bonn, Germany, stands as a leading telecommunications company, not just in Germany but on a global scale. Offering a comprehensive range of services including mobile communication, broadband, fixed network telephony, and digital solutions, Deutsche Telekom plays a pivotal role in advancing digital transformations. In Germany, it is particularly renowned for its high-speed internet services and cutting-edge infrastructure, continuously enhancing connectivity and technological reach across various sectors, thereby fueling business efficiency and growth in the region.

Location 🇩🇪 Nordrhein-Westfalen, Bonn	Size View 2 employees
Revenue $ 500-1000M	Industries Hardware, Internet Services, Mobile, Messaging and Telecommunications
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5. Marquardt

Marquardt, based in Germany, is a significant player in the telecommunications industry, specializing in the development and manufacturing of complex switching and sensor systems. Their products, which include user interface and battery management systems, are integral to enhancing connectivity and performance in telecom applications. Known for innovation and reliability, Marquardt’s systems play a crucial role in ensuring efficient telecommunications operations across varied platforms in Germany. Their commitment to quality and technological advancement positions them as a key supplier in the telecommunications sector.

Location 🇩🇪 Baden-Wurttemberg, Rietheim-weilheim	Size View 3,185 employees
Revenue $ 500-1000M	Industries Hardware, Mobile
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6. Rosenberger Group

Rosenberger Group, located in Germany, stands out as a key player in the telecommunications industry. This company is renowned for its precision manufacturing of high-frequency connectors and related components used extensively in telecommunications systems. With a commitment to high-quality engineering solutions, Rosenberger supports the infrastructure enabling today’s high-speed, data-driven services. The company’s relentless innovation not only supports domestic needs but also caters to a global clientele, ensuring robust and efficient communication networks. This dedication to advancing telecommunications technology cements Rosenberger’s position as a leader in the industry.

Location 🇩🇪 Bayern\|Oberbayern\|Berchtesgadener Land, Fridolfing	Size View 1,413 employees
Revenue $ 500-1000M	Industries Consumer Electronics, Hardware, Manufacturing
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7. TeleTrusT

TeleTrusT, based in Germany, is a distinguished player in the telecommunications industry, specializing in cybersecurity. The organization plays a critical role in shaping national and international security standards, fostering a safe digital environment for telecom businesses. With a focus on innovative security solutions and adherence to rigorous data protection norms, TeleTrusT is instrumental in empowering companies across Germany and beyond to safeguard their communications networks and data assets reliably. This commitment not only boosts operational efficiency but also enhances the overall trust in telecommunications infrastructure.

Location 🇩🇪 Berlin	Size View 3 employees
Revenue $ 500-1000M	Industries Information Technology, Hardware
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8. BSN Medical

BSN Medical, located in Germany, primarily focuses on healthcare solutions, yet plays a significant role in telecommunications for healthcare settings. This connection ensures robust communication systems which are essential for modern medical environments, facilitating better patient care through enhanced data transmission and real-time updates across healthcare facilities. Their involvement in this area highlights the integration of health technology and telecommunications, emphasizing the importance of reliable and efficient communication in medical contexts.

Location 🇩🇪 Hamburg	Size View 1,149 employees
Revenue $ 500-1000M	Industries Internet Services, Hardware
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9. TransnetBW

TransnetBW, located in Germany, operates as a crucial component in the European telecommunications and energy sector. This company specializes in the transmission of electricity across high voltage networks and ensures a stable energy supply within the region. With a focus on integrating renewable energy sources and enhancing the reliability of the grid, TransnetBW is committed to advancing Germany’s energy transition goals. Their strategic initiatives not only support local energy needs but also contribute to the broader European energy market’s stability and efficiency.

Location 🇩🇪 Baden-Wuerttemberg\|Stuttgart\|Stuttgart, Stuttgart	Size View 856 employees
Revenue $ 500-1000M	Industries Energy, Manufacturing, Hardware
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