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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,378 companies indexed · Last updated: today
DirectoryEnergy & Environment

Energy & Environment

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IndustryEnergy & Environment
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8'993 companies found

A. Winiger Sanitäre Anlagen GmbH Logo

A. Winiger Sanitäre Anlagen GmbH 

Jona · Since 1997

The core activity of A. Winiger Sanitäre Anlagen GmbH is the planning, installation, maintenance and repair of sanitary systems in new and renovation projects, for both private homeowners and large customers. This includes, in particular, the creation of sanitary installations, the performance of regular maintenance work and the provision of emergency services. In addition, the company also offers renovation management services, where it coordinates various specialist trades such as painting, tiling, electrical, plastering and masonry.

Plumbing & Building ServicesSolar & Photovoltaics
View profile4.6(9)
AWU AG System- und Umwelttechnik Logo

AWU AG System- und Umwelttechnik 

Oberhasli · Since 2020

The core activity of AWU AG System- and Environmental Technology consists of planning, designing, installing and maintaining plants and systems for wastewater treatment, rainwater management and environmental technology. The company provides solutions for the treatment of wastewater, rainwater and other environmental media, and supports customers in implementing sustainable and efficient systems.

Technical Consulting & EngineeringWaste Management IndustryMechanical Engineering Industry
View profile3.7(9)
Bcomp AG Logo

Bcomp AG 

Fribourg · Since 2011

The core activity of Bcomp is the development and manufacture of high-performance, bio-based materials based on natural fibers, particularly flax, for various industries such as automotive, mass transport, motorsport, sailing yachts, consumer electronics and infrastructure, with the goal of decarbonizing the world.

Sustainability Sector
View profile4.9(9)
Beni Frei AG Logo

Beni Frei AG 

Wängi · Since 2012

The core activity of Beni Frei AG is waste disposal and skip rental services. Specifically, the company offers the rental of skips in various sizes (2.5 m3 to 35m3) for renovation, new construction and other waste disposal purposes. Additionally, the company also carries out household clearances.

Waste Management Industry
View profile4.3(9)
BIMA Energie AG Logo

BIMA Energie AG 

Münchwilen Tg · Since 2015

The core activity of BIMA Energie AG is the production and sale of biogas, as well as the disposal and operation of a biogas plant in Münchwilen TG.

Energy Suppliers
View profile2.8(9)
Birchler Recycling SA Logo

Birchler Recycling SA 

Villeneuve Vd · Since 2019

The core activity of Birchler Recycling is the recovery and recycling of various materials such as metals, cars, household appliances, paper, cardboard, wood and other waste. The company also offers services such as dismantling, collection and transportation of waste.

Waste Management IndustryMetal Industry
View profile4.1(9)
Bühlmann AG Malters Logo

Bühlmann AG Malters 

Malters · Since 1991

The core activity of Bühlmann AG Malters is the provision of services and works in the field of building envelopes, particularly: Roofing (pitched roof, flat roof), façade construction, skylight installation, solar energy (solar panel installation), and building maintenance. The company thus offers a comprehensive range of services for the construction, maintenance, and modernization of buildings.

RoofingSolar & Photovoltaics
View profile4.7(9)
Buri Kaufmann AG Logo

Buri Kaufmann AG 

Bolligen · Since 1982

The core activity of Buri Kaufmann AG encompasses the provision of services in the following areas: Sanitation: Installation and maintenance of sanitary facilities for households, companies, gastronomy and public institutions; Metalwork: Metalwork on roofs and facades; House connections: Installation and implementation of house connections; Solar systems/Photovoltaics: Planning and installation of solar systems; Rainwater harvesting: Efficient rainwater use for households; Lightning protection: Installation and maintenance of lightning protection systems. The company thus offers a comprehensive range of services in the field of building technology and renewable energies.

Sheet Metal WorkSolar & Photovoltaics
View profile4.7(9)
BV Kompostieranlage Oensingen AG Logo

BV Kompostieranlage Oensingen AG 

Oensingen · Since 1994

The core activity of BV Kompostieranlage Oensingen AG is the composting of green waste and the production of biogas and electricity through anaerobic digestion. The company operates a composting plant and a biogas plant, where green waste is processed into compost and biogas. The biogas is then converted into electricity. Additionally, the resulting digestate is used as fertilizer in agriculture.

Sustainability Sector
View profile4.8(9)
Centravo Holding AG Logo

Centravo Holding AG 

Lyss · Since 1941

Waste Management Industry
View profile4.7(9)
DÜRR-AGRO GmbH Logo

DÜRR-AGRO GmbH 

Ziefen · Since 1999

The core activity of Dürr Ziefen company encompasses agriculture, particularly arable farming and meat production with Galloway mother cows, as well as composting and hay production.

Sustainability Sector
View profile5(9)
ECCO2 Solutions AG Logo

ECCO2 Solutions AG 

Givisiez · Since 2019

The core activity of ECCO2 Solutions AG is the development and provision of solutions to reduce energy consumption in buildings through the use of IoT-, IT- and AI-supported heating control.

Technical Consulting & EngineeringSustainability Sector
View profile2(9)
Elektro H. Hauri AG Logo

Elektro H. Hauri AG 

Seengen · Since 2004

The core activity of Elektro H. Hauri AG encompasses all work and consulting services in the field of electrical installations, including: electrical installations, e-mobility, photovoltaics, electrical planning, building automation, electrical inspections, LED retrofits, and household appliances. The company offers these services to private and business customers in the Seetal region and is considered a reliable partner for architects, builders, and other clients.

Solar & Photovoltaics
View profile4.4(9)
Elektro-Lumen GmbH Logo

Elektro-Lumen GmbH 

Susten · Since 2002

The core activity of Elektro Lumen is the planning, installation and repair of electrical systems and installations, including: electrical planning, electrical installations, telematics systems, electrical heating systems, TV systems, household electrical appliances, electrical repairs, photovoltaic systems, electrical inspections and electrobiology. The company thus offers a wide range of electrical services, from planning and installation to maintenance and repair.

Solar & Photovoltaics
View profile5(9)
Energie Genossenschaft Schweiz Logo

Energie Genossenschaft Schweiz 

Bern · Since 2012

The core activity of Energie Genossenschaft Schweiz (EGch) is the planning, implementation, maintenance and sale of photovoltaic systems for single-family homes, multi-family homes and cooperatives, with the aim of promoting a more energy-autonomous society and spreading renewable energies.

Solar & Photovoltaics
View profile3.4(9)
Ganeos AG Logo

Ganeos AG 

Zurich · Since 1966

The core activity of Erdgas Ostschweiz AG is the procurement and sale of natural gas, as well as the provision of supporting services for local natural gas suppliers. This includes the planning, execution and maintenance of natural gas networks and facilities, as well as ensuring a reliable energy supply through network management and dispatching.

Energy Suppliers
View profile4.7(9)
ETAVIS Elettro-Impianti SA Logo

ETAVIS Elettro-Impianti SA 

Faido · Since 2021

ETAVIS Elettro-Impianti SA provides electrotechnical services and solutions for private and commercial clients. Its services include electrical installations, communication systems, building automation, solar systems and EV charging infrastructure, switchgear construction, planning, electrical inspections and a 24/7 emergency service.

Solar & Photovoltaics
View profile4.3(9)
HLV Energie Sàrl Logo

HLV Energie Sàrl 

Romont Fr · Since 2013

Eurosanitherm Sàrl is a specialist in installations and services for sanitary, heating and air conditioning systems. The core activities include: installation, maintenance and repair of heating systems, including boilers and heat pumps; installation and maintenance of sanitary facilities, including bathrooms and sanitary installations; installation of solar systems, including photovoltaic and thermal systems; detection and repair of water damage and leaks; sale and installation of bathrooms, bathtubs, showers and other sanitary facilities; consulting and planning of sanitary and heating systems. The company also offers a 24-hour emergency service for urgent repairs and maintenance work.

Solar & Photovoltaics
View profile5(9)
Filtech Entwässerungen AG Logo

Filtech Entwässerungen AG 

Kreuzlingen · Since 1989

The core activity of FILTECH AG is the development and provision of solutions for solid-liquid separation, particularly in the field of sludge dewatering and thickening. This includes the planning, installation and maintenance of plants such as screw presses, decanter centrifuges, sieve tables, belt filter presses and flocculation stations. The company also offers mobile rental machines and services such as septic tank emptying and pipe cleaning.

Waste Management IndustryMechanical Engineering Industry
View profile4.1(9)
Frei + Bättig Elektro AG Logo

Frei + Bättig Elektro AG 

Schenkon · Since 2009

Frei + Bättig Elektro AG provides electrical services including consulting and planning, installation and maintenance, as well as multimedia and communication/IT solutions, photovoltaic systems, e-mobility charging and smart-home automation.

Electrical Planning & InstallationSolar & Photovoltaics
View profile5(9)
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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.