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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

W. Ryffel AG Logo

W. Ryffel AG 

Bubikon · Since 1975

The company's core activity is sewer cleaning and wastewater transport, including the emptying of septic tanks and the maintenance of sewer lines. Additionally, the company also offers tipper truck transport, winter maintenance services and the sale of fuels.

Waste Management Industry
View profile5(5)
Zürcher Aquatech AG Logo

Zürcher Aquatech AG 

Sommeri · Since 1998

The core activity of Zürcher Aquatech encompasses the areas of Sanitation, Solar and Sheet Metal Work. Specifically, the company offers the following services: * Sanitation: New constructions, renovations, rainwater utilization, wastewater pumps and pressure-boosting pumps, service and maintenance * Solar: Solar water heating systems, solutions for flat roofs, pitched roofs or wall-mounted installations * Sheet Metal Work: Gutters and downspouts, façade cladding made of metal, window and chimney cladding, metal roofing, liquid membrane connections, lightning protection, repairs and maintenance * Water Supply: Laying of pressure pipes made of cast iron or plastic, repairs and maintenance of pipeline networks, hydrant maintenance The company thus offers a wide range of services in the areas of sanitation, solar and sheet metal work as well as water supply.

Sheet Metal WorkSolar & Photovoltaics
View profile5(5)
Zürcher Haustechnik GmbH Logo

Zürcher Haustechnik GmbH 

Orpund · Since 2013

The core activity of Zürcher Haustechnik GmbH is consulting, planning and installing heating and sanitary systems for new buildings, renovations and refurbishments, including maintenance and service for these systems.

Solar & Photovoltaics
View profile4.8(5)
Aare Kanaltechnik GmbH Logo

Aare Kanaltechnik GmbH 

Lyss · Since 2011

Aare Kanaltechnik GmbH provides sewer and pipe cleaning and related maintenance services. Its offerings include high-pressure cleaning, suction works, drain unblocking, CCTV inspection and locating, tightness testing, and point-repair rehabilitation methods (Hesan, Polypipe).

Waste Management Industry
View profile5(4)
AES Alternative Energie Systeme GmbH Logo

AES Alternative Energie Systeme GmbH 

Buchs Sg · Since 2008

The core activity of Alternative Energie Systeme GmbH (AES) is consulting, planning and implementing highly efficient energy systems in buildings, as well as providing energy-efficient products and corresponding knowledge transfer. The company focuses on the areas of heat management, energy management and energy efficiency, offering products such as stratified storage tanks, fresh water stations, solar thermal systems and photovoltaics.

Technical Consulting & EngineeringSolar & Photovoltaics
View profile4.5(4)
Agritechno, Christophe Lambert Logo

Agritechno, Christophe Lambert 

Savigny · Since 1993

The core activity of AgriTechno is the development, manufacture and distribution of products and solutions for agriculture, horticulture, aquaculture and environmental protection. This includes, among other things: agricultural technology and equipment for precision farming, products for protecting plants and animals from pests and diseases, systems for water purification and treatment in aquaculture and gardens, and solutions for preserving and protecting ecosystems and biodiversity. The company also offers consulting and service services to support its customers in implementing and using its products.

Sustainability Sector
View profile4.8(4)
alsona ag Logo

alsona ag 

Beromünster · Since 2017

Alsona AG is a service company specializing in the planning, implementation and consulting of energy concepts. The core activities include the installation and configuration of photovoltaic systems, battery storage systems, generator sets and other energy efficiency solutions for various industries such as industry, commerce, agriculture, residential buildings and e-mobility. In addition, the company offers consulting and services in the field of energy efficiency and sustainability.

Technical Consulting & EngineeringElectrical Planning & InstallationSolar & Photovoltaics
View profile5(4)
Annen Holzbau AG Logo

Annen Holzbau AG 

Goldau · Since 1973

The core activity of Annen Holzbau AG is timber construction, particularly the planning, execution and renovation of timber structures, residential buildings, commercial buildings, interior fittings, staircase construction, roofing, facades and other timber constructions. The company also offers emergency services for roof damage and photovoltaic systems.

Building MaintenanceTimber Construction & CarpentryRoofing
View profile4.8(4)
arbatherm AG Logo

arbatherm AG 

Winterthur · Since 1987

The core activity of Arbatherm AG is the planning, consulting, installation and maintenance of solar, heating and sanitary systems, with a focus on renewable energies and sustainable solutions.

Technical Consulting & EngineeringPlumbing & Building ServicesSolar & Photovoltaics
View profile4.3(4)
AREC Abfall-Recycling Bern AG Logo

AREC Abfall-Recycling Bern AG 

Bern · Since 1988

The core activity of AREC AG is the recycling and disposal of waste, including the acceptance and processing of various materials such as metal, paper, glass, wood, electrical waste and other special waste. The company also provides services for the disposal of commercial and industrial waste.

Waste Management Industry
View profile5(4)
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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.
Per page
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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.