| # | Company | Employees |
|---|---|---|
| 1 | 3,758 | |
| 2 |
ENGIE Energy Access (Africa)igniteenergyaccess.com
Provides affordable, reliable, sustainable electricity to underserved communities across Africa through solar home systems, mini-grids, and commercial solutions. |
2,169 |
| 3 |
50Hertz Transmission GmbH50hertz.com
Operation and expansion of high-voltage electricity transmission network in northern and eastern Germany, ensuring reliable supply and renewable integration. |
1,865 |
| 4 |
SEFE Securing Energy for Europe GmbHsefe.eu
International energy partner, providing reliable, affordable supply through trading, sales, transport, and storage, supporting decarbonization with clean energy investments. |
1,662 |
| 5 |
Qcells Europeq-cells.eu
Global supplier of solar cells, modules, energy storage systems, and distributed energy solutions with international manufacturing facilities and extensive research and development centers. |
1,151 |
| 6 |
BEW Berliner Energie und Wärme GmbHbew.berlin
Provider of district heating, cooling, and decentralized energy solutions focusing on decarbonization through coal phase-out and climate-neutral generation for the city of Berlin. |
996 |
| 7 |
Stromnetz Berlin GmbHstromnetz.berlin
Responsible for the distribution network in Berlin, advancing towards a Smart City with sustainable resources, ensuring reliable electricity supply through underground cables |
865 |
| 8 |
Trench Grouptrench-group.com
Leading sustainable transformation in electric power industry with advanced high-voltage products like instrument transformers, bushings, and coils. |
864 |
| 9 |
ib vogt GmbHibvogt.com
Develops turnkey PV plants and battery storage projects. Performs all services: development, financing, EPC, O&M, asset management for global electricity decarbonization. |
844 |
| 10 |
Omexom Deutschlandomexom.de
Specializing in energy infrastructure, this company plans, builds, and maintains energy systems worldwide, offering solutions for e-mobility and smart cities |
765 |
| 11 |
DB Bahnbau Gruppe GmbHbahnbaugruppe.de
The company focuses on building and maintaining railway infrastructure, promoting diversity and innovation, and offering a wide range of services and career opportunities |
725 |
| 12 |
GASAG Gruppegasag-gruppe.de
Traditional Berlin-based energy company providing gas, green electricity, and innovative technologies to lead and shape the energy transition. |
718 |
| 13 |
Q ENERGYqenergy.eu
Development, construction, and management of large-scale renewable energy projects including solar, wind, storage, hybrid plants, and green hydrogen across Europe. |
617 |
| 14 | 401 | |
| 15 |
Veolia | Deutschlandveolia.de
A leading global provider of optimized resource management solutions in water, waste, and energy sectors, focusing on sustainable development for communities and businesses |
305 |
| 16 |
Digital Charging Solutionsdigitalchargingsolutions.com
Develops charging solutions for automobile manufacturers and fleet operators, making charging at stations easy, safe, and comfortable, with a fast-growing global network. |
275 |
| 17 |
HPS Home Power Solutions AGhomepowersolutions.de
A global leader in developing integrated energy storage systems based on green hydrogen for buildings, addressing key aspects of the energy transition with their innovative picea system |
149 |
| 18 |
Iberdrola Deutschlandiberdrola.de
Leading the energy transition, the company operates renewable energy plants, offers decarbonization services, and provides tailored green energy solutions to reduce CO2 footprint |
118 |
| 19 |
ubitricityubitricity.com
Operates extensive public charge point network. Provides lamppost, bollard, fast, and rapid charging solutions. Partners with local authorities to expand infrastructure. |
82 |
| 20 |
Plugsurfingplugsurfing.com
They provide a software connecting drivers, charging points, and car makers to make car charging easy and ensure public EV charging points are always available |
66 |
| 21 |
Storengy Deutschlandstorengy.de
A leading gas storage company in Germany, specializing in planning, building, and operating storage facilities for climate-neutral energy like hydrogen and renewable gases |
59 |
| 22 |
Frequenzfrequenz.com
Develops an autonomous mind platform for managing, storing, and trading power, empowering developers to orchestrate decentralized energy resources efficiently using AI and machine learning. |
56 |
| 23 | 56 | |
| 24 |
IP Innovative Power GmbHipinnovativepower.com
Invests and develops sustainable energy microgrids for European real estate to reduce emissions and costs, integrating various clean technologies and managing projects end-to-end. |
42 |
| 25 |
WALL-Ewall-e.works
Provides comprehensive charging and energy solutions, covering all aspects of power delivery for various applications. All-encompassing charging. |
20 |
| 26 |
urban energy GmbHurbanenergy.de
The company empowers utilities and property managers to intelligently manage energy usage and emissions, enabling tomorrow's energy revolution today |
19 |
| 27 |
Get it Done Technologies GmbHgetitdone.rocks
Connecting electricians with businesses and drivers for electric vehicle charging infrastructure installation, exchange, and maintenance across Germany through a digital platform. |
14 |
| 28 |
LIFTE H2lifteh2.de
A hydrogen infrastructure solutions provider offering engineering services for integrated systems, supporting hydrogen projects across H2 production, mobility, utilities, and industrial applications |
14 |
| 29 |
FPS.Energy GmbHryzepower.com
Specializing in alternative fuels, Ryze Power develops infrastructure for sustainable energy delivery to reduce diesel reliance in the transportation sector |
12 |
| 30 |
The New Motion Deutschland GmbHnewmotion.com
An automotive company located in Berlin, Germany, specializing in providing innovative solutions for electric vehicle charging |
10 |
| 31 |
SOLARIMOsolarimo.de
A company specializing in planning, building, operating, and marketing solar installations on various properties, focusing on simplifying solar energy solutions for different sectors |
8 |
| 32 | 7 | |
| 33 |
Ladegrün!wirelane.com
German company offering 100% certified green energy and tailored charging infrastructure for electric vehicles, promoting eco-friendly and community-driven electromobility nationwide |
3 |
| 34 |
Flixgrid GmbHflixgrid.de
A Berlin-based start-up leveraging machine learning & AI to optimize energy storage systems and provide intelligent services for value maximization |
2 |
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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.
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