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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,805 companies indexed · Last updated: today
DirectoryEnergy & Environment

Energy & Environment

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IndustryEnergy & Environment
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9'003 companies found

Theo Michel GmbH Sanitär Heizung Spenglerei Logo

Theo Michel GmbH Sanitär Heizung Spenglerei 

Dottikon · Since 2008

The core activity of Theo Michel GmbH is the provision of services and solutions in the field of building technology, particularly in the areas of: Sanitation: planning, installation, renovation and repair of sanitation systems; Heating: planning, installation, renovation and repair of heating systems; Plumbing: provision of plumbing services; Photovoltaics: planning, installation and maintenance of photovoltaic systems. The company thus offers comprehensive services for building technology, from planning to maintenance and repair, and positions itself as a reliable partner for all building technology-related questions.

Sheet Metal WorkSolar & Photovoltaics
View profile4.9(21)
the pink sheep GmbH Logo

the pink sheep GmbH 

Zurich · Since 2019

The core activity of the company 'the pink sheep' is to promote sustainability in the fashion industry through upcycling, repair and reuse of textiles. The company offers workshops, consulting and professional support to inspire and enable customers to redesign their used clothing and create unique, high-quality products. Additionally, the company provides an environmental education initiative for school classes to raise awareness about the impact of fast fashion on the environment.

Sustainability Sector
View profile4.8(21)
Vadec SA Logo

Vadec SA 

La Chaux-De-Fonds · Since 2008

Vadec SA manages the collection, treatment, recovery and disposal of waste and provides services for households, municipalities and businesses. It operates thermal waste‑to‑energy plants, regional logistics centres for recycling and composting, drop‑off sites and public information and visit programmes.

Waste Management Industry
View profile3.8(21)
Waser Rohrunterhalt GmbH Logo

Waser Rohrunterhalt GmbH 

Pfungen · Since 2021

The company's core activity is sewer cleaning, sewer rehabilitation and pipe cleaning, including the removal of pipe blockages, conducting pipe tightness tests and the rehabilitation of sewers and pipes. The company also offers a 24-hour emergency service for pipe breaks and blockages.

Waste Management Industry
View profile5(21)
BBR Recycling und Deponie AG Logo

BBR Recycling und Deponie AG 

Rothenburg · Since 2018

BBR Recycling und Deponie AG manufactures and supplies asphalt, concrete, mortar, and sand and gravel aggregates while using recycled materials in its products. The company operates a recycling site, accepts various construction waste at its landfill, and reports recycled-content shares of about 40% in asphalt and roughly 30% in concrete.

Waste Management Industry
View profile4.6(20)
Bill + Künzi AG Logo

Bill + Künzi AG 

Liebefeld · Since 1988

The core activity of bill + künzi ag is the planning, installation and maintenance of building technology systems, particularly in the field of heating and plumbing, including the installation of heat pump systems, solar systems and other renewable energy systems.

Plumbing & Building ServicesSolar & Photovoltaics
View profile5(20)
Bio Test Agro AG Logo

Bio Test Agro AG 

Münsingen · Since 1998

The core activity of Bio Test Agro AG is the control and certification of agricultural, processing and trading companies in the field of organic farming. The company offers services such as inspections, certifications and consulting to ensure compliance with legal requirements, private labels and other requirements.

Sustainability Sector
View profile4(20)
E-Confort Sàrl Logo

E-Confort Sàrl 

Vugelles-La Mothe · Since 2020

The core activity of E-Confort is the planning, installation and maintenance of heating, ventilation, air conditioning, sanitary and renewable energy systems, particularly solar energy, for private households.

Solar & Photovoltaics
View profile5(20)
Edwin Kunz AG Logo

Edwin Kunz AG 

Grüningen · Since 1973

The core activity of E. Kunz AG encompasses the planning, installation and maintenance of electrical systems, including photovoltaic and e-mobility solutions, as well as the provision of ICT services such as network and communication technology, security and surveillance systems, software development and system engineering.

Solar & Photovoltaics
View profile4.7(20)
Elektro Fierz AG Logo

Elektro Fierz AG 

Männedorf · Since 1979

The core activity of Elektro-Fierz AG encompasses the planning, installation, and maintenance of electrical systems and installations, including: electrical installations (new buildings, renovations, and refurbishments), communication technology (network cabling, telephone installations, and WLAN installations), lighting (garden lighting, interior lighting), e-mobility (charging infrastructure for electric vehicles), and photovoltaics (planning and installation of solar systems). The company also provides service work and consulting services in these areas.

Electrical Planning & InstallationSolar & Photovoltaics
View profile4.8(20)
Elektro Sonderer AG Logo

Elektro Sonderer AG 

Appenzell · Since 1991

The company is an electrical installation business offering a wide range of services, including: planning and installation of high and low voltage systems, photovoltaics and smart energy, smart home and lighting, IT and multimedia, including network technology, and electrobiology. These services are provided to various types of customers, including agricultural businesses, residential and commercial properties, for both new constructions and renovations.

Solar & Photovoltaics
View profile4.9(20)
Felix Unholz AG Logo

Felix Unholz AG 

Ebmatingen · Since 2002

The core activity of Felix Unholz AG includes comprehensive electrical installations, including high and low voltage, planning of electrical installations, maintenance services, telematics, cloud solutions, network and server solutions, as well as specialized services such as photovoltaic systems, storage systems, lifting and conveying systems, smart home systems, charging stations for electric vehicles and other electrical engineering solutions.

Solar & Photovoltaics
View profile4.6(20)
GGS AG Logo

GGS AG 

Gelterkinden · Since 2024

The core business of GGS AG includes the areas of timber construction, roofing, sheet metal work and alternative energies. In particular, the company offers services such as timber construction, roof construction, timber element construction, facades, terrace decking, roof windows and roof dormers, sheet metal work, lightning protection, liquid plastic, roofing, renovations, maintenance work and solar systems.

Building MaintenanceTimber Construction & CarpentrySheet Metal Work
View profile4.8(20)
Ghelma AG REDEKO Logo

Ghelma AG REDEKO 

Meiringen · Since 1991

Ghelma AG REDEKO operates container (mulden) services, waste collection and sorting points, and excavation and inert-material landfill sites. The organisation provides recycling and composting services and handles sorting, reuse or disposal of construction waste, wood, metal, cardboard, plastics, green waste and similar materials.

Waste Management Industry
View profile4.5(20)
Graf AG Heizung Lüftung Sanitär Logo

Graf AG Heizung Lüftung Sanitär 

Schötz · Since 2004

The core activity of Graf AG is the planning, installation, maintenance and repair of building technology systems, particularly in the areas of: * Heating (heating systems, heat pumps, wood heating, oil heating, gas heating) * Plumbing (renovation, new construction, repairs, service) * Ventilation (renovation, repairs, service) * Solar (thermal solar systems) The company also offers services such as bathroom renovations, decalcification and maintenance.

Solar & Photovoltaics
View profile4.8(20)
Hüppi Dachbau AG Logo

Hüppi Dachbau AG 

Goldingen · Since 2017

The core activity of Hüppi Dachbau AG is the planning, execution and maintenance of roof and building envelopes, including flat roofs, pitched roofs, roof windows, sheet metal work, solar systems, facades, shingles and liquid plastic coatings. The company also offers services in the areas of construction, renovation and major construction sites.

Solar & Photovoltaics
View profile4.7(20)
IBC Energie Wasser Chur (IBC) Logo

IBC Energie Wasser Chur (IBC) 

Chur · Since 2007

The core activity of IBC Energie Wasser Chur is to supply customers with energy and water, including: electricity from renewable sources (hydroelectric power and solar energy), gas (biogas and natural gas), drinking water from the Chur region, heat and cooling solutions from sustainable energy sources, and e-mobility solutions with charging infrastructure. The company also develops and operates heat networks and is responsible for billing services and maintenance of the supply networks.

Energy Suppliers
View profile3.6(20)
Kanalsanierung 24 AG Logo

Kanalsanierung 24 AG 

Mägenwil · Since 2023

The company's core activity is the trenchless rehabilitation and maintenance of sewage pipes and pipe systems in buildings and main sewers, including the execution of tightness tests, construction work and the application of innovative technologies such as liner rehabilitation and spray coating processes.

Waste Management Industry
View profile5(20)
Keller Gebäudetechnik GmbH Logo

Keller Gebäudetechnik GmbH 

Niederwil Sg · Since 2016

Keller Gebäudetechnik GmbH provides planning, installation and maintenance of heating systems, including air‑to‑water and ground‑probe heat pumps, wood‑fired heating, thermal solar systems and gas and oil heating solutions.

Solar & Photovoltaics
View profile5(20)
Kirsch + Egli AG Logo

Kirsch + Egli AG 

Wädenswil · Since 1978

Kirsch + Egli AG provides electrical installation and related services, including electrical planning, new-build and renovation work, maintenance and repairs of electrical systems. Services include conventional installations, lighting supply and installation, network, telephone and multimedia cabling, building automation, photovoltaic systems and alarm/video solutions.

Solar & Photovoltaics
View profile4.2(20)
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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.