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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,219 companies indexed · Last updated: today
DirectoryEnergy & Environment

Energy & Environment

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IndustryEnergy & Environment
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Matching companies

9'014 companies found

Waldhaus Stiftung Logo

Waldhaus Stiftung 

Lützelflüh-Goldbach · Since 1993

The company 'Waldhaus' is a seminar centre that focuses on promoting sustainability, ecology and regenerative culture. It offers spaces for seminars, workshops and events and features a vegetarian self-service restaurant. In addition, the company is involved in various projects, such as promoting ecological agriculture, preserving sources and water cycles, and developing sustainable building technologies.

Sustainability Sector
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Waldstudio GmbH Logo

Waldstudio GmbH 

Wabern · Since 2022

The core activity of Waldstudio GmbH is the provision of services in the field of sustainable development of forests, nature and rural areas. This includes in particular: * Technical projects and mandates for public and private actors in Switzerland and internationally, with a focus on forest management, nature conservation and rural development. * Coaching and consulting in the field of sustainable development, using the forest as a space for reflection and further development. The company thus offers a combination of technical expertise and coaching services to develop sustainable solutions for the development of forests, nature and rural areas together with its customers.

Sustainability Sector
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Wald und Klima Ursern Logo

Wald und Klima Ursern 

Andermatt · Since 2021

The core activity of the company 'Wald und Klima Ursern' is the promotion of environmental protection and climate protection through reforestation and CO2 compensation. The company is committed to planting trees and supporting projects that combat climate change. It offers opportunities for donations, memberships and volunteer work to achieve its goals.

Sustainability Sector
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Walter Kälin Holzbau AG Logo

Walter Kälin Holzbau AG 

Hinwil · Since 1997

The core activity of Walter Kälin Holzbau AG is timber construction, particularly the new construction, renovation and refurbishment of buildings with wood, as well as the manufacture of wooden frames and the installation of solar systems.

Building ConstructionBuilding MaintenanceSolar & Photovoltaics
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Walter Salzmann GmbH Logo

Walter Salzmann GmbH 

Zuoz · Since 1997

The core activity of Walter Salzmann GmbH is the provision of services in the field of roofing and sheet metal work, including the planning, execution and maintenance of roof systems, as well as the installation of photovoltaic systems. Specifically, this includes the areas of: Roofing (pitched roof, flat roof, roof windows, roof coverings, roof renovations), sheet metal work (roof structures, metal roofs, dormer windows, snow retention systems), photovoltaics (planning, installation and maintenance of photovoltaic systems), renovations and refurbishments of roof systems, and sealing and insulation of building envelopes. The company offers these services for all types of roofs and is specialized in meeting the needs of customers in the Upper and Lower Engadine.

Solar & Photovoltaics
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Walter Zwald Coffee Buying & Consulting Logo

Walter Zwald Coffee Buying & Consulting 

Meggen · Since 1999

The core activity of the company 'Coffee Buying & Consulting' is the consulting of coffee roasters and coffee-producing export organizations, as well as the trade and export of coffee, with a focus on the highest coffee quality under fair conditions and considering economic, social and ecological sustainability.

Sustainability Sector
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Walther Saalfeld Sourcing und Consulting Logo

Walther Saalfeld Sourcing und Consulting 

Glarus · Since 2008

The core activity of the company 'Walther Saalfeld Sourcing & Consulting' is the consulting and support of companies in the photovoltaic and solar technology industry, particularly in the planning, setup and optimization of production facilities, as well as in the development of business opportunities in China.

Solar & Photovoltaics
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Wandu Energie AG Logo

Wandu Energie AG 

Trubschachen · Since 2020

The core activity of Wandu Energie AG is the trading of certificates of origin from renewable energy sources, particularly solar power, in Switzerland.

Technical Consulting & EngineeringSolar & PhotovoltaicsSustainability Sector
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Wärme Genossenschaft Bern Logo

Wärme Genossenschaft Bern 

Bern · Since 2020

The company's core activity is the planning, implementation and maintenance of projects in the field of renewable energy, particularly heat and solar systems. This includes the conversion of heating systems, the expansion of photovoltaic systems and the installation of heat pumps. The company acts as a general contractor and offers a comprehensive service, from planning and design to execution and maintenance of the systems.

Energy Suppliers
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Wärme Lindau AG Logo

Wärme Lindau AG 

Tagelswangen · Since 1996

Wärme Lindau AG is a subsidiary of EW Lindau AG operating in the heat sector. It operates a district heating network in Tagelswangen and offers connections on request as well as services such as heating cost billing.

Energy Suppliers
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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.