These German companies specialize in cybersecurity, IT services, and public safety. The list includes large, established firms such as DEKRA, which provides expert safety services worldwide, and TÜV SÜD, offering testing and certification across various industries. Giesecke+Devrient focuses on digital security and financial platforms, while T-Systems International delivers end-to-end IT solutions. Rohde & Schwarz provides test, measurement, and cybersecurity solutions, and BWI GmbH is the digitalization partner for the Bundeswehr.
A notable pattern among these companies is the strong presence of IT Services and IT Consulting firms, indicating a focus on digital transformation and security. Many of these companies, like TÜV SÜD, Giesecke+Devrient, and Rohde & Schwarz, have long histories, with founding dates in the 19th and early 20th centuries, suggesting a foundation of traditional engineering and safety expertise that has evolved into modern cybersecurity.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 49,000 | ||||
| 2 |
TÜV SÜDtuvsud.com
Experts provide testing, certification, auditing, and advisory services across various industries, ensuring safety, security, and sustainability for technological advancements and market access. |
18,205 | |||
| 3 |
Giesecke+Devrientgi-de.com
Global SecurityTech company providing digital security, financial platforms, and currency technology to enhance trust and safety worldwide. |
13,000 | |||
| 4 |
PwC Deutschlandpwc.de
A leading auditing and consulting firm in Germany, offering services worldwide with expertise in assurance, tax, legal, deals, and strategy advisory |
11,566 | |||
| 5 |
T-Systems Internationalt-systems.com
Provides end-to-end IT solutions, cloud migration, and industry-specific digital transformation services with strong security and global presence. |
10,768 | |||
| 6 |
Rohde & Schwarzrohde-schwarz.com
Technology group creates innovations, empowers industrial, regulatory, and military customers with test, measurement, and cybersecurity solutions, pushing boundaries in AI, 6G, cloud. |
9,600 | |||
| 7 |
TÜV NORD GROUPtuev-nord-group.com
Offers global consulting, service, and inspection solutions across diverse sectors including mobility, industrial services, IT, natural resources, and aerospace. |
5,960 | |||
| 8 | 4,318 | ||||
| 9 |
Schwarz Digitsschwarz-digits.de
Providing cloud, cybersecurity, data, AI, communication, and workspace solutions for businesses, public sector, and society with strong IT infrastructure. |
4,292 | |||
| 10 |
Accenture DACHaccenture.com
A global consulting firm specializing in strategy, management, digitalization, technology, and business transformation, guiding clients through innovation and operational execution |
3,934 | |||
| 11 | 3,741 | ||||
| 12 |
SVA System Vertrieb Alexander GmbHsva.de
A leading system integrator in Germany, offering IT products and services, data center infrastructure, business continuity, IT service management, SAP solutions, and operational support |
3,101 | |||
| 13 | 2,627 | ||||
| 14 |
Elektrobitelektrobit.com
Provides software and solutions for software-defined vehicles, including operating systems, middleware, digital cockpits, and engineering services. |
2,208 | |||
| 15 |
Maternamaterna.de
An internationally successful IT service provider supporting businesses and authorities with digitalization through consulting, implementation, and operation services across various sectors |
2,134 | |||
| 16 | 1,994 | ||||
| 17 |
All for Oneall-for-one.com
An innovative IT services company with over 2,800 experts, focusing on digital transformation for 3,000+ customers in the DACH region |
1,671 | |||
| 18 |
MTI Technology GmbHde.mti.com
A reliable partner offering storage, backup, datacenter optimization, security, cloud solutions, and managed services to guide businesses through digital transformation successfully |
1,655 | |||
| 19 |
Bundesdruckerei-Gruppebundesdruckerei.de
A technology company dedicated to secure identities, data, and infrastructure, specializing in high-security technology products and services trusted by businesses, states, and authorities |
1,384 | |||
| 20 |
Siemens Advantasiemens-advanta.com
A global management consultancy navigating companies through digitalization journey from strategy to operations with industry and digital expertise |
1,336 | |||
| 21 | 1,178 | ||||
| 22 |
KÖTTER Serviceskoetter.de
A diverse group specializing in security, cleaning, personnel services, and property management with over 90 branches and 50 locations in Germany |
1,145 | |||
| 23 |
TUV Rheinlandtuv.com
An international certification company providing services to ensure quality standards are met for various industries worldwide |
1,002 | |||
| 24 |
secunet Security Networks AGsecunet.com
Provides cybersecurity products and consulting for resilient digital infrastructures, protecting data, applications, and digital identities in areas like cloud, IIoT, eGovernment, and eHealth. |
969 | |||
| 25 | 918 | ||||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Federal Office for Information Security (BSI)bsi.bund.de
This company shapes and enhances information security in digitization by focusing on prevention, detection, and reaction for government, business, and society |
878 | |||
| 27 |
iC Consultic-consult.com
Independent consultancy providing identity and access management services including advisory, implementation, integration, support, and managed cybersecurity solutions worldwide. |
842 | |||
| 28 |
ESG Elektroniksystem- und Logistik-GmbHhensoldt.net
A German company specializing in developing, integrating, and supporting security systems and software for public sector and industry clients worldwide |
826 | |||
| 29 | 761 | ||||
| 30 |
Controlwarecontrolware.de
Provides consulting, planning, installation, maintenance, and management of IT networks with expertise in security, communications, and data centers. |
748 | |||
| 31 |
AmaliTechamalitech.com
A social business in Africa offering free IT training to empower youth for employment in the tech sector, promoting diversity and inclusion |
640 | |||
| 32 |
q.beyond AGqbeyond.de
Provides leading IT solutions for SMEs, addressing technological challenges, making business models future-ready, and enhancing business value with proprietary AI data centers. |
634 | |||
| 33 |
DEKRA Digital & Product Solutionsdekra.com
The company specializes in creating intelligent testing solutions for various industries to ensure safety and security in the digitalized world |
631 | |||
| 34 | 630 | ||||
| 35 | 630 | ||||
| 36 |
IGEL Technologyigel.com
Leader in secure endpoint OS for enterprises, specializing in VDI, DaaS, and secure browsing Supports Zero Trust security model, trusted worldwide Fueling growth and sustainability for organizations |
628 | |||
| 37 |
IT-Dienstleistungszentrum Berlinitdz-berlin.de
Specializing in standardizing ICT workplaces, offering consulting and implementing new solutions to improve service quality for the City of Berlin |
589 | |||
| 38 |
Campana & Schottcampana-schott.com
International consultancy specializing in digitalization, New Work, sustainability, and organizational transformations for major corporations and mid-size companies. |
569 | |||
| 39 |
DIGITALLdigitall.com
Provider of digital solutions and services including AI, CRM, cybersecurity, data strategy, software engineering, and cloud services across Europe. |
563 | |||
| 40 |
operational services GmbH & Co. KGoperational-services.de
A leading ICT service provider in Germany, offering data center, network, and application services, with expertise in various industries and secure cloud solutions |
533 | |||
| 41 |
Utimacoutimaco.com
Develops on-premises and cloud-based hardware security modules, key management, data protection, identity management, and data intelligence solutions for critical infrastructures. |
533 | |||
| 42 |
Hornetsecurityhornetsecurity.com
A global provider of cloud-based security solutions, offering comprehensive protection for Microsoft 365 and serving over 75,000 customers worldwide |
533 | |||
| 43 |
Ratiodataratiodata.de
IT service provider offering tailored concepts, high-quality hardware/software/services, expertise in complex IT solutions, and digitalization with a focus on security and regulatory compliance |
527 | |||
| 44 |
ISO-Gruppeiso-gruppe.com
An international IT service provider specializing in software engineering and IT consulting for various sectors, including tourism, SAP, and public administration |
512 | |||
| 45 |
SoSafesosafe-awareness.com
Empowers organizations to build security culture, mitigate risk through GDPR-compliant awareness programs. Behavioral science, smart algorithms, engaging personalized learning, smart attack simulations. |
507 | |||
| 46 |
Manage Nowmanage-now.de
Providing comprehensive managed IT services integrating people, processes, and infrastructure to enable secure, scalable digital transformation and business growth. |
495 | |||
| 47 | 452 | ||||
| 48 |
Telekom Securitygeschaeftskunden.telekom.de
Creating a secure digital future with minimal risk and maximum opportunities for businesses of all sizes, offering comprehensive cybersecurity solutions |
448 | |||
| 49 |
G DATA CyberDefensegdata.de
Develops and provides cybersecurity products, services, and strategies, including endpoint protection and antivirus software, to ensure digital security and cyber sovereignty for businesses and individuals. |
399 | |||
| 50 |
Veridosveridos.com
A global provider of complete identity solutions trusted by governments worldwide for its comprehensive product portfolio |
389 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
More company lists in Germany
- The largest companies in Germany 15,224
- Multinational companies in Germany 4,800
- Companies with in-house R&D in Germany 2,450
- Manufacturers in Germany 1,957
- Software Development companies in Germany 1,401
- SaaS companies in Germany 1,389
- Retail chains in Germany 1,383
- Family-owned companies in Germany 1,330
- Hardware manufacturers in Germany 1,316
- Critical infrastructure operators in Germany 1,305
- Financial services firms in Germany 1,265
- Transportation, Logistics, Supply Chain and Storage companies in Germany 1,145
- Companies with a mobile app in Germany 928
- IT Services and IT Consulting companies in Germany 911
- Corporate groups and holding companies in Germany 832
- Public sector organisations in Germany 812
- IT services companies in Germany 776
- Financial Services companies in Germany 745
- Professional services firms in Germany 690
- Logistics companies in Germany 597
- Consulting firms in Germany 584
- Automotive manufacturers and suppliers in Germany 504
- Banking companies in Germany 485
- Machinery Manufacturing companies in Germany 476