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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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Matching companies

9'016 companies found

GAIASENS Technologies SARL Logo

GAIASENS Technologies SARL 

Martigny · Since 2010

The core activity of Gaiasens Technologies is the development, installation and maintenance of systems for monitoring and measuring environmental factors such as weather, air quality, snow and glaciers. The company specializes in the development of solutions for meteorological monitoring, air and water quality assurance, as well as monitoring of natural hazards such as avalanches and glacier movements. Gaiasens Technologies also develops and installs camera systems for visual monitoring of environmental factors and offers services for data analysis and visualization.

Sustainability Sector
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Gaia Tech AG Logo

Gaia Tech AG 

Zollikofen · Since 2021

Gaia Tech AG develops and produces upcycled ingredients from agricultural by-products for the cosmetics and food industries. Its core activity involves developing treatment and utilization solutions for agricultural by-products that can be converted into natural compounds to replace synthetic ingredients in products.

Sustainability Sector
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GAIAVIDA AG Logo

GAIAVIDA AG 

Zug · Since 2023

GAIAVIDA is an online marketplace specializing in the marketing of products that have a positive impact on the environment and human health. The company's core activity is to offer products that promote the regeneration of the earth and human health, such as water, microorganisms, and traditional home remedies. The company pursues a sustainable and morally responsible business strategy based on personal responsibility, transparency, and appreciation.

Sustainability Sector
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Ganz Klima GmbH Logo

Ganz Klima GmbH 

Rüti Zh · Since 2003

The core activity of Ganz Klima GmbH is the analysis and assessment of indoor air quality through chemical, biological and physical measurements. This includes in particular: * Acceptance measurements for certification according to Minergie-Eco, SNBS, LEED, SGNI/DGNB * Complaint measurements to clarify foreign odors and health problems * Status measurements to assess room air hygiene aspects and identify solutions for a good indoor climate * Measurements to check the indoor air quality in offices, schools and other buildings * Clarification of old pollutants such as wood preservatives, tar or PCB in old buildings The company thus offers comprehensive services in the field of indoor air quality and hygiene.

Sustainability Sector
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Gasa Hydro SA Logo

Gasa Hydro SA 

Sierre · Since 2012

The core activity of Gasa Hydro SA is the design, construction and maintenance of small hydroelectric power plants equipped with Pelton turbines.

Construction & Project ManagementEnergy Suppliers
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Gasche Bau und Energie GmbH Logo

Gasche Bau und Energie GmbH 

Biberist · Since 2015

Gasche Bau und Energie GmbH provides external building administration and client advisory services for municipalities, and supplies interim project management and temporary leadership for industrial projects. The company also carries out energy analyses of industrial processes and supports procurement and infrastructure maintenance projects.

Technical Consulting & EngineeringConstruction & Project ManagementSustainability Sector
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Gasser Wassertechnik AG Logo

Gasser Wassertechnik AG 

Zwingen · Since 2016

The core activity of Gasser Wassertechnik AG is the planning, implementation and maintenance of water supply systems, including leak detection and repair. The company also offers products and services in the field of water supply and advises customers on complex issues.

Water Supply
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GazEl SA Logo

GazEl SA 

Vétroz · Since 2007

The core activity of GazEL SA is the treatment of organic waste and the production of biogas. Specifically, this includes the collection and processing of various types of organic waste such as green waste, restaurant waste, old wood, feces and waste from the food industry to produce biogas. Additionally, the company produces natural fertilizers as a by-product of the biogas process.

Waste Management Industry
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GDR - Green Dental Recycling GmbH Logo

GDR - Green Dental Recycling GmbH 

Rorschach · Since 2011

GDR - Green Dental Recycling GmbH provides professional disposal and recycling services for amalgam-containing dental waste, including free collection and online ordering for full amalgam separator containers. The company is described on its website as a certified waste disposal specialist that issues digital disposal certificates and operates with an emphasis on CO2-neutral, resource-conscious handling.

Waste Management Industry
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Gebr. Trütsch Logo

Gebr. Trütsch 

Unteriberg · Since 1990

The core activity of Gebr. Trütsch is the provision of services in the areas of sanitary, heating and metal construction. Specifically, this includes the installation, renovation and maintenance of heating systems, as well as the provision of sanitary services and the manufacture and assembly of metal structures.

Solar & Photovoltaics
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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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How is organisation size determined?
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.