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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,173 companies indexed · Last updated: today
DirectoryEnergy & Environment

Energy & Environment

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IndustryEnergy & Environment
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9'016 companies found

GMR solar ag Logo

GMR solar ag 

Kreuzlingen · Since 2014

Solar & Photovoltaics
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g-neration.energy AG Logo

g-neration.energy AG 

Gwatt (Thun) · Since 2018

Licensing & Marketing of Intellectual PropertySustainability Sector
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Graniti Bulgheroni SA Logo

Graniti Bulgheroni SA 

Iragna · Since 1979

Waste Management Industry
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Granit Technologies and Engineering (GRT) SA Logo

Granit Technologies and Engineering (GRT) SA 

Orbe · Since 1981

The core activity of Granit Technologies and Engineering (GRT) SA consists of the development, design and implementation of technological solutions for the treatment and valorization of various types of solid and liquid waste. In particular, the company offers a range of innovative technologies and specialized engineering services, including: the treatment of non-biodegradable or hazardous sludges and liquid waste using the proprietary CleanWOx technology; the conversion of non-recyclable plastic waste into a valuable fuel; the torrefaction of low-grade, perishable organic raw materials to produce a high-quality fuel; the gasification of mixed, non-recyclable waste; and the implementation of waste treatment and recycling chains that integrate innovative solutions as an alternative to incineration and landfilling, with the goal of achieving 'zero waste'.

Waste Management Industry
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green4 ag Logo

green4 ag 

Baar · Since 2008

The company green4 ag primarily focuses on optimizing building efficiency, energy balance, and costs as well as greenhouse gas emissions. It offers services in the fields of electrical engineering and construction, with the goal of advancing the energy transition.

Sustainability Sector
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green car repair GmbH Logo

green car repair GmbH 

Zofingen · Since 2021

The green car repair GmbH is a label for independent body shops that specialize in ecological car repairs. The company's core activity is to operate a network of certified body shops that perform repairs according to ecological standards. These repairs include, among other things, the restoration of exterior body parts, plastic repairs, windshield repairs, and headlight repairs. The company promotes the approach 'repair before replace' to relieve the environment and reduce CO2 emissions.

Sustainability Sector
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green-energiesysteme GmbH Logo

green-energiesysteme GmbH 

Bad Zurzach · Since 2021

The company Green Energiesysteme GmbH focuses on the planning, installation and maintenance of environmentally friendly energy systems, particularly in the areas of heating, air conditioning, ventilation and solar systems. They offer individual solutions for customers and advise on the selection and implementation of renewable energies. Furthermore, they support customers in applying for subsidies to maximize the profitability and satisfaction of projects.

Solar & Photovoltaics
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Green Energy Flies AG Logo

Green Energy Flies AG 

Wienacht-Tobel · Since 2022

The core activity of Green Energy Flies AG is the development and implementation of sustainable solutions for the energy transition, particularly in the field of renewable energy sources such as solar, wind and hydro power. The company focuses on optimizing processes and supply chains, transforming the construction sector and promoting sustainable practices in various industries. It develops and offers energy-efficient building technologies, intelligent building technology and agricultural solutions to promote sustainable development.

Sustainability Sector
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greenleaves-greenlights GmbH Logo

greenleaves-greenlights GmbH 

Turgi · Since 2013

Sustainability Sector
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GreenLife CSR GmbH Logo

GreenLife CSR GmbH 

Küsnacht Zh · Since 2009

The core activity of GreenLife CSR GmbH is the development and implementation of projects in the field of environmental protection, particularly in the areas of reforestation, wildlife and climate protection, as well as the brokerage of carbon offsets. The company supports businesses in achieving their Corporate Social Responsibility (CSR) goals and provides solutions for sustainable development.

Sustainability Sector
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Green Minded, Valérie Hill Logo

Green Minded, Valérie Hill 

Aran · Since 2003

The core activity of Green Minded is consulting and communication in the field of sustainability, particularly in supporting municipalities, institutions and companies in the development and implementation of sustainable projects and strategies. This includes services such as project management, communication strategies, intelligent collectivity and the creation of plans for energy and climate.

Sustainability Sector
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Green Montagen GmbH Logo

Green Montagen GmbH 

Arbon · Since 2023

Green Montagen GmbH provides photovoltaic services for B2B clients, including consulting, system design, installation and ongoing maintenance of solar PV systems.

Electrical Planning & InstallationSolar & Photovoltaics
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Green Universe SA Logo

Green Universe SA 

Mezzovico · Since 2012

Sustainability Sector
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Green Utility Sagl Logo

Green Utility Sagl 

Paradiso · Since 2020

The company is a service provider in the field of environmental and energy consulting, particularly in the area of circular economy (Ciclo), offering projects, services and consulting.

Technical Consulting & EngineeringSolar & Photovoltaics
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green world Systems GmbH Logo

green world Systems GmbH 

Uhwiesen · Since 2011

The core activity of the company 'Greenworld Systems' encompasses the development and implementation of sustainable, ecological and holistic solutions and products in the areas of: energy generation, water technology, agroforestry, urban greening, recycling, and environmental protection. The company offers innovative solutions for a better world in harmony with humans, nature, and life, and supports environmental, social, and cultural projects. It also develops and distributes products and systems in the field of green technologies, such as hemp circular economy, and offers services like consulting and project development.

Sustainability Sector
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Griffin Ranger GmbH Logo

Griffin Ranger GmbH 

Uster · Since 2021

The core activity of Griffin Ranger GmbH encompasses the provision of specialized services in the areas of ranger services, environmental consulting, training and wildlife management. This includes, in particular, the preservation of sensitive natural habitats, the resolution of conflicts between human activities and habitat protection, as well as the implementation of training and further education measures for rangers and junior rangers.

Sustainability Sector
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Grischelectra AG Logo

Grischelectra AG 

Chur · Since 1978

Energy Suppliers
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Groupe E Valais SA Logo

Groupe E Valais SA 

Sion · Since 1960

Solar & Photovoltaics
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Gruelmob Sagl Logo

Gruelmob Sagl 

Motto (Blenio) · Since 2020

Technical Consulting & EngineeringSolar & Photovoltaics
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Grün ECO Carclean GmbH Logo

Grün ECO Carclean GmbH 

Zurich · Since 2018

The core activity of Grun Eco Car Clean is environmentally friendly car cleaning, including interior and exterior cleaning, disinfection and conservation of vehicles, all without the use of water. The company offers a mobile service, where cleaning is carried out on site at the customer's location.

Sustainability Sector
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Grünspecht GmbH Logo

Grünspecht GmbH 

Birsfelden · Since 2014

The core activity of Grünspecht GmbH encompasses the implementation of practical work in nature reserve maintenance, near-natural green space maintenance, and near-natural gardening. This includes specific maintenance work in nature reserves, such as controlling invasive neophytes, removing problem plants, clearing valuable biotopes, and selective mowing of meadows and edges. Furthermore, the company offers its own nature conservation projects and enables people with difficult market conditions to achieve social and professional integration through meaningful work assignments in nature.

Sustainability Sector
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Guggenheim Solutions GmbH Logo

Guggenheim Solutions GmbH 

Cham · Since 2015

The core activity of Guggenheim Solutions is the planning, implementation and maintenance of photovoltaic projects, including portfolio analysis, obtaining permits, applying for subsidies, construction and installation of solar systems, as well as taking over energy sales and power management. The company offers its customers a 'worry-free' package that covers all necessary steps for the realization of a photovoltaic project.

Solar & Photovoltaics
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Guido Sigrist AG Logo

Guido Sigrist AG 

Regensdorf · Since 2012

The core activity of Guido Sigrist AG is the installation, maintenance and repair of solar systems and photovoltaic systems, as well as the performance of service work in the heating and sanitary sector.

Solar & Photovoltaics
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H2 Solar AG Logo

H2 Solar AG 

Linthal · Since 2020

The core activity of H2 Solar AG is the development of technologies for artificial photosynthesis, in particular through the development of membranes that can split water into hydrogen and oxygen, thereby creating a sustainable and clean energy source.

Research & DevelopmentSolar & Photovoltaics
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Häfeli Altmetalle + Entsorgungen Logo

Häfeli Altmetalle + Entsorgungen 

Wil Sg · Since 2018

The company provides services in the field of recycling and disposal of old metals, wood, plastics, cardboard, waste and combustible materials. The core activities include collection, sorting, recycling and environmentally friendly disposal of these materials. The company also provides containers such as boxes, drums and frames to facilitate the collection and storage of old metals.

Waste Management Industry
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Halter Biotreibstoffe GmbH Logo

Halter Biotreibstoffe GmbH 

Thalwil · Since 1998

Halter Biotreibstoffe GmbH produces biodiesel (UCOME) from used vegetable oils and grease trap fats and supplies it, for example, in 1,000‑litre IBC containers. The company collects waste cooking oil from restaurants and public collection points and also handles kitchen and food waste, part of which is processed in a biogas plant to generate electricity.

Waste Management IndustryLogistics & Transport Companies
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Hampi Stocker GmbH Logo

Hampi Stocker GmbH 

Lucerne · Since 2019

The core activity of Hampi Stocker GmbH is the execution of dismantling work, clearances and disposals.

Waste Management Industry
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Harnisch S.A. Logo

Harnisch S.A. 

Sonceboz-Sombeval · Since 2001

Solar & Photovoltaics
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helcoplan GmbH Logo

helcoplan GmbH 

Basel · Since 2022

Technical Consulting & EngineeringSustainability Sector
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Helvetia Trust AG Logo

Helvetia Trust AG 

Wetzikon Zh · Since 2007

The company's core activity is the development, design, production and marketing of combined heat and power units (CHP) as well as the installation and investment in energy-efficient energy generation concepts for customers. The company also provides consulting services and engineering services in the field of combined heat and power (CHP).

Energy SuppliersFunds & Investment Companies
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H.E. Privé AG Logo

H.E. Privé AG 

Amriswil · Since 2020

The core activity of HE Privé AG is the investment, development and management of solar power plants and solar parks to produce and sell renewable energy. The company also offers services such as leasing, maintenance and repair of solar power plants. Furthermore, it enables private investors to invest in solar energy and benefit from the returns without having to bear the entire financial burden of purchasing and installing solar panels.

Solar & Photovoltaics
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Hermann Schwyzer AG Logo

Hermann Schwyzer AG 

Stans · Since 1980

The core activity of Schwyzer Heizungen AG is the planning, installation, maintenance and repair of heating systems, including environmentally friendly heating systems such as heat pumps, solar systems, wood heating systems, oil heating systems and pellet heating systems. The company also offers service activities such as burner service, corrosion protection and ventilation systems.

Solar & Photovoltaics
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HFS Aqua AG Logo

HFS Aqua AG 

Winterthur · Since 2004

The core activity of HFS Aqua AG is the development and implementation of individual solutions for drinking water and wastewater treatment. The company offers comprehensive services, including planning, sales, execution, service and development, as well as design and realization of projects.

Waste Management Industry
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HIBO Group AG Logo

HIBO Group AG 

Fehraltorf · Since 2011

The core activity of HIBO Group AG is the development and implementation of projects in the field of renewable energy, recycling and ecological construction, particularly through the production and marketing of environmentally friendly fuels, such as briquettes made from agricultural waste, with the goal of sustainably improving living conditions in Ghana and West Africa.

Management ConsultingWaste Management IndustryWholesale - Spare Parts & Residual Materials
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HK Partners AG Logo

HK Partners AG 

Bremgarten B. Bern · Since 2020

The core activity of HK PARTNERS is to advise and support companies and organizations in the development and implementation of sustainability strategies, particularly in the packaging industry and climate protection. The company offers services such as strategy development, project management, stakeholder management, and solution development for specific sustainability challenges. The goal is to help companies improve their sustainability, reduce their environmental impact, and simultaneously increase their competitiveness and long-term success.

Sustainability Sector
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Holz-Energie Wiedlisbach AG Logo

Holz-Energie Wiedlisbach AG 

Wiedlisbach · Since 2015

Energy Suppliers
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HopSol AG Logo

HopSol AG 

Wilen B. Wollerau · Since 2010

The core activity of HOPSOL Africa is the development, construction and operation of solar power plants, including on- and off-grid solar systems, fuel-saving regulators and solar-diesel hybrid systems on a large technical scale, particularly for use in desert and desert-like regions.

Solar & Photovoltaics
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WELES GROUP (Switzerland) AG Logo

WELES GROUP (Switzerland) AG 

Baar · Since 2020

The core activity of Hunter and Fry is advising and supporting companies in migrating and operating SAP systems on hyperscalable cloud platforms, in particular on the platforms of Amazon Web Services (AWS), Microsoft, Google and other global technology leaders.

Technical Consulting & EngineeringSolar & PhotovoltaicsSoftware Development
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Hydrospider AG Logo

Hydrospider AG 

Niedergösgen · Since 2019

The core activity of Hydrospider AG is the procurement, production and logistics of green hydrogen from CO2-free production, particularly for use in the mobility and logistics sectors, as well as the marketing and distribution of verifiably green hydrogen for the decarbonization of heavy-duty transport.

Energy SuppliersEnergy Industry
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Hydroswiss SA Logo

Hydroswiss SA 

Silvaplana · Since 2011

The core activity of Hydroswiss SA is the development and implementation of solutions for water treatment and purification, including: wastewater treatment (Waste Water), drinking water treatment (Drink Water), desalination (Desalination), industrial water treatment (Industrial Water), treatment of process water in the paper industry (Paper Mills Process), leachate treatment (Leachate Treatment), fishery water treatment (Fishery Water), electrodialysis (Electrodialysis), and sanitary water treatment (Sanitized Water). The company also offers solutions for energy generation from waste and biomass, including: bio-oil production (Bio-oil), energy generation from waste (Waste To Energy), and energy generation from biomass (Sludge To Energy). Furthermore, Hydroswiss SA also offers solutions for wastewater treatment and energy generation from LNG (Liquefied Natural Gas).

Waste Management IndustryMechanical Engineering Industry
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HydroVista AG Logo

HydroVista AG 

Cham · Since 2010

Technical Consulting & EngineeringSustainability Sector
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Hygie Biotech Sàrl Logo

Hygie Biotech Sàrl 

Payerne · Since 2016

Hygie Biotech Sàrl distributes chemotyped essential oils derived from wild plants.

Sustainability Sector
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HyG-Nature GmbH Logo

HyG-Nature GmbH 

Galgenen · Since 2022

The core activity of HyG-Nature is to advise and support customers in the use of hydrogen as a renewable energy source, as well as in the implementation of sustainable lifestyles and ecological business processes. This includes in particular: Consulting on the use of hydrogen as a renewable energy source, support in importing hydrogen-powered vehicles, consulting and support in implementing alternative heating and energy generation systems, consulting and support on natural, sustainable lifestyles, and consulting on the ecological assessment of business processes. The company also offers a shop where customers can purchase natural health products and components for automation technologies.

Sustainability Sector
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i4en AG Logo

i4en AG 

Münsingen · Since 2023

The core activity of i4en AG is the planning, installation and marketing of solar systems and renewable energy installations.

Solar & Photovoltaics
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IFSEC - Institute for solar energy concepts GmbH Logo

IFSEC - Institute for solar energy concepts GmbH 

Wil Zh · Since 2014

Solar & Photovoltaics
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IGE Solar AG Logo

IGE Solar AG 

Alpnach Dorf · Since 2013

Energy Suppliers
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IHT International Hydrogen Technologies AG Logo

IHT International Hydrogen Technologies AG 

Oberriet Sg · Since 2000

The company's core activity is the development and distribution of technologies for the production of green hydrogen from wastewater or seawater using a unique, patented vaporization electrolysis.

Sustainability Sector
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Im Haselhain Furrer Logo

Im Haselhain Furrer 

Konolfingen · Since 2021

The core activity of the company 'Im Haselhain' is the application and dissemination of permaculture principles through courses, workshops, tutoring, consulting and design, particularly in the field of sustainable garden and landscape design.

Sustainability Sector
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IMPACT TANK Association Logo

IMPACT TANK Association 

Winterthur · Since 2021

The core activity of Impact Tank is the development and implementation of social and ecological projects and companies in Africa, particularly in Namibia, with the goal of achieving sustainable economic and social improvements. This includes: Venture Building: Developing and scaling commercial companies with social and ecological impact. Advisory & Consulting: Advising and supporting organizations in the development and implementation of projects and companies with social and ecological impact. Project-Delivery: Supporting non-profit organizations and other partners in the implementation of projects with social and ecological impact. Soft Landing & Operations: Supporting companies in establishing themselves in local markets in Africa, including formulating local strategies, supporting the hiring and management of local employees, and providing logistics services.

Sustainability Sector
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Impulsum Lab GmbH Logo

Impulsum Lab GmbH 

Basel · Since 2023

The core activity of Impulsum Lab is to provide sustainability consulting services, particularly in the areas of B Corp certification, Net Zero strategies, and sustainable corporate governance. The company supports organizations in developing and implementing sustainability strategies and helps them minimize their environmental impact and increase their social responsibility.

Sustainability Sector
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Frequently asked questions

Searching the directory

How the search works, what each filter means, and how the results come together.

What can I search for in the directory?
The search field matches company names, industries and places. Beyond that you can filter by Industry (18 categories based on the NOGA classification), Size (number of employees), Region (canton, language region or postal code) and Special (keywords and entry date). Filters combine freely; the active ones appear as chips below the filter bar and can be removed there individually.
How do keywords work?
Keywords search the description and stated purpose of each company — the text that goes beyond the company name. Multiple keywords are combined with OR: every additional keyword widens the set of matches rather than narrowing it.
What belongs in the postal code field?
A single postal code (e.g. 8000) or a range (e.g. 1000-1010). The field accepts postal codes only — for place names, use Canton or Language region.
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Size reflects the number of employees and is calculated from publicly available information by a model developed in-house. It is a best-possible estimate, not an official figure.
What does the Verified label mean?
Verified means the entry is tied to a UID (Swiss business identification number) and therefore links back to the official Swiss business register. The label speaks to the company's identity — it is not a rating of its performance.

Source: Federal Statistical Office, UID register

How do I sort the results?
Use the dropdown above the list: Relevance, Name (A–Z), Best rating, Most reviews or Longest established. You can also switch between list and map view and set how many results appear per page.