| # | Company | Employees |
|---|---|---|
| 1 |
University of Kasseluni-kassel.de
A young university promoting openness, interdisciplinary thinking, and entrepreneurial initiative, with a unique focus on environmental studies, teacher training, and cultural sciences |
2,673 |
| 2 |
K+S Groupkpluss.com
A customer-focused supplier of mineral products for agriculture, industry, consumers, and communities, with a commitment to sustainability and global distribution network |
2,157 |
| 3 |
AuPairWorldaupairworld.com
Connecting families and young people for cultural exchange and work-life balance through the largest au pair placement internet platform since 1999 |
1,588 |
| 4 |
Wintershall Deawintershalldea.com
A leading European gas and oil company transitioning to focus on gas, carbon management, and low carbon hydrogen projects globally |
1,026 |
| 5 |
Klinikum Kassel GmbHgesundheit-nordhessen.de
A leading regional healthcare provider offering a wide range of medical services, specialized clinics, interdisciplinary centers, and care for thousands of patients annually |
679 |
| 6 |
Technoformtechnoform.com
Global family business with 14 production sites worldwide, specializing in plastic extrusion for various industries Values family philosophy, offers training, and diverse opportunities |
549 |
| 7 |
HÜBNER Grouphubner-group.com
Globally supplies gangway systems for vehicles, rubber products, plastics, and industrial textiles. Also provides laser, terahertz, and high-frequency technologies. |
546 |
| 8 |
Vitoskarriere.vitos.de
A strategic managementholding of twelve non-profit entities providing psychiatric, psychosomatic, and forensic-psychiatric diagnostic and treatment services Offering career opportunities and investing in employee development |
546 |
| 9 |
Stadt Kasselkassel.de
largest public employer in Northern Hesse with over 4,000 employees, offering jobs in administration, social services, health, technical, and crafts sectors. |
506 |
| 10 |
K+S KALI GmbHkali-gmbh.com
A leading supplier of potash, magnesium, and sulphur products extracted from six mines in Germany for fertilizers and various industrial applications |
405 |
| 11 |
Fraunhofer IEEiee.fraunhofer.de
Research institute focused on developing technical and economic solutions for the global transition to renewable energy and ensuring grid stability |
315 |
| 12 |
Evangelische Bankeb.de
Provides sustainable financial services focused on church, health, and social sectors, promoting a socially responsible and livable society. |
276 |
| 13 |
finofino.group
A German-based tech startup providing market-leading products for account aggregation, analytics, and financial control to individuals and SMEs through superior technology |
235 |
| 14 |
Kasseler Sparkassekasseler-sparkasse.de
A leading credit institution in North Hesse with over 900 employees, significantly contributing to the economy of Kassel region |
226 |
| 15 |
PlentyONEplentyone.com
A cloud-based e-commerce ERP with integrations to 70+ sales channels, offering omnichannel strategy execution, automation of sales processes, and extensibility through third-party apps |
219 |
| 16 |
UNIKIMSunikims.de
A management school affiliated with the University of Kassel offering advanced educational programs to over 1200 professionals yearly, merging academia with practical experience |
171 |
| 17 |
Volksbank Kassel Göttingen eGvolksbank-kassel-goettingen.de
As a cooperative bank, we are values-oriented, supporting our region with financial services, employment, and community engagement, believing in our responsible business model |
165 |
| 18 |
Gesundheit Nordhessen Holding AGgesundheit-nordhessen.de
Gesundheit Nordhessen provides a wide range of outpatient and inpatient healthcare services, including maximum care, medical care, and rehabilitation facilities in the region |
162 |
| 19 | 154 | |
| 20 |
Landkreis Kassellandkreiskassel.de
Public administration providing governmental services and functions to citizens |
148 |
| 21 |
Plansecurplansecur.de
Plansecur is a financial advisory company in Germany with 180 independent advisors, providing comprehensive financial guidance to clients without external interests |
146 |
| 22 |
EB – Sustainable Investment Management (EB-SIM)eb-sim.de
A leading sustainable investment management firm offering institutional and private clients impact-focused strategies aligned with the United Nations' Sustainable Development Goals |
75 |
| 23 |
GetMyInvoicesgetmyinvoices.com
Cloud-based invoice management solution for small and medium-sized businesses Automatically retrieves bills, imports invoices, syncs with other systems, and facilitates teamwork |
27 |
| 24 |
mela wear GmbHmelawear.de
MELA offers uncompromisingly sustainable fashion made in India with Fairtrade certification, GOTS, and Grüner Knopf, including textiles, bags, and shoes |
20 |
| 25 |
Ninjaneers GmbHninjaneers.de
A modern IT consulting company with experienced ninjas providing support for complex application development, marketing, and operation, emphasizing innovation and quality |
17 |
| 26 |
Cantus Verkehrsgesellschaft MbHcantus-bahn.de
A transportation company based in Kassel, Germany, providing services in trucking, railroad, and public transportation |
10 |
| 27 |
ILTRANS Deutschland GmbH Internationale Speditioniltrans.com
Specialized logistics operator offering comprehensive intermodal forwarding solutions for companies in automotive, building materials, chemistry, electronics, mining, and metallurgy industries |
4 |
| 28 |
HeyFlutter.comheyflutter.com
A leading Flutter development company specializing in websites, mobile apps, TV apps, and backend servers with a focus on quality, client satisfaction, and developer training |
3 |
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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 Oct 24, 2026.
The same list elsewhere in Germany
- The largest companies in Germany 13,481
- The largest companies in North Rhine-Westphalia 2,663
- The largest companies in Bavaria 2,566
- The largest companies in Baden-Württemberg 1,960
- The largest companies in Hesse 1,227
- The largest companies in Lower Saxony 785
- The largest companies in Rhineland-Palatinate 389
- The largest companies in Schleswig-Holstein 286
- The largest companies in Saxony 263
- The largest companies in Brandenburg 119
- The largest companies in Berlin 1,475
- The largest companies in Munich 957
- The largest companies in Hamburg 824
- The largest companies in Frankfurt 475
- The largest companies in Cologne 417
- The largest companies in Düsseldorf 307
- The largest companies in Stuttgart 266
- The largest companies in Bremen 177
- The largest companies in Hanover 139
- The largest companies in Bonn 135
- The largest companies in Nuremberg 132
- The largest companies in Karlsruhe 119
- The largest companies in Essen 112
- The largest companies in Mannheim 106