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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,089 companies indexed · Last updated: today
DirectoryEnergy & Environment

Energy & Environment

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IndustryEnergy & Environment
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9'017 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
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A. Soltermann AG Kanaltechnik Logo

A. Soltermann AG Kanaltechnik 

Unterkulm · Since 2021

The core activity of A. Soltermann AG Kanaltechnik is the inspection, cleaning and rehabilitation of pipes and lines, including trenchless and open construction methods, for private individuals, property management companies, businesses, industrial companies, public institutions and municipalities.

Waste Management Industry
View profile4(4)
Association Sol-Conseil Logo

Association Sol-Conseil 

Gland · Since 1996

The core activity of Sol-Conseil is the performance of laboratory analyses and consulting services in the fields of agronomy and environmental protection, particularly in soil conservation. The company operates a laboratory and an office for studies and offers services such as the analysis of soil and environmental samples, consulting on soil use and environmental protection, as well as the implementation of studies and research projects in these areas.

Sustainability Sector
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Azienda elettrica ticinese Logo

Azienda elettrica ticinese 

Monte Carasso · Since 1959

Azienda elettrica ticinese is an energy utility that produces electricity and heat, operates grid and transmission services, engages in energy trading, and provides energy-related products and services including production facilities and electromobility offerings.

Energy Suppliers
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A-Z Kanalreinigung GmbH Logo

A-Z Kanalreinigung GmbH 

Meilen · Since 2023

The core activity of A-Z Kanalreinigung GmbH is the cleaning and maintenance of drainage systems, including sewer cleaning, pipe cleaning, flushing, suction work, sewer television and surface cleaning. The company also offers a 24/7 emergency service and has modern equipped emergency vehicles and qualified personnel to rectify damage as quickly and cost-effectively as possible.

Waste Management Industry
View profile5(4)
Bai Angelo e figlio SA Logo

Bai Angelo e figlio SA 

Ascona · Since 2003

The core activity of Bai Angelo e Figlio SA is the planning, consulting, installation, maintenance and repair of sanitary and heating systems, including solar, irrigation and swimming pool systems. The company also offers a 24-hour emergency service and standby service.

Plumbing & Building ServicesSolar & Photovoltaics
View profile4(4)
BGS Compost S.A. Logo

BGS Compost S.A. 

Givrins · Since 1991

The core activity of BGS Compost SA is the composting of organic waste, particularly garden and landscape waste, as well as the production and sale of compost products. The company also offers various services, including waste transportation and disposal, waste shredding and compost screening.

Waste Management Industry
View profile4.3(4)
Biogas Ticino SA Logo

Biogas Ticino SA 

S. Antonino · Since 2011

The core activity of Biogas Ticino SA is the production of energy from so-called Sottoprodotti, i.e. by-products from agriculture and industry that have reached the end of their life cycle. These by-products are referred to as biomass and consist of 80% agricultural products and 20% co-substrates.

Energy Suppliers
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Blanke Automation GmbH Logo

Blanke Automation GmbH 

Bremgarten Ag · Since 2013

The core activity of BLANKE automation GmbH encompasses the development, production, and installation of customer-specific solutions in the following areas: 1. Industrial Automation: Planning, engineering, and realization of projects in industrial automation, including the development of PLC controls and RFID systems. 2. Air and Climate Systems: Development and production of control systems for air and climate systems, including the manufacture of standard solutions and customized systems. 3. Photovoltaics: Planning and installation of modern solar systems, including the optimization of self-consumption and monitoring of solar energy production. 4. Monitoring and Visualization: Development and provision of monitoring systems, such as remoteclick, for monitoring and visualization of machine and plant data. The company thus offers a wide range of services and products tailored to the needs of its customers in the areas of industrial automation, air and climate systems, photovoltaics, and monitoring.

Solar & Photovoltaics
View profile5(4)
Calanda Muldenservice AG Logo

Calanda Muldenservice AG 

Chur · Since 2019

Calanda Muldenservice AG provides skip and container rental solutions for construction, commercial and private customers, offering sizes from 1 m³ to 36 m³ including press, covered and flat containers. Services include delivery and collection, professional waste disposal and construction-material recycling.

Waste Management Industry
View profile4.8(4)
Calandawind AG Logo

Calandawind AG 

Haldenstein · Since 2013

The core activity of Calandawind is the planning, construction and operation of wind power plants, in particular the largest wind power plant in Switzerland, to produce electricity.

Energy Suppliers
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.
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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.