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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

Gassmann Haustechnik AG Logo

Gassmann Haustechnik AG 

Wengen · Since 2007

Gassmann Haustechnik AG is a service company specializing in the planning, implementation and execution of building technology solutions. The company's core activities include: sanitary installations and renovations, plumbing and metalwork, roof services and renovations, including lightning protection and roofing, heating technology, including heat pumps, wood and pellet heating systems, oil-fired boilers and solar systems, photovoltaic systems, wellness facilities and installations, bathroom and sanitary facilities, including Geberit AquaClean solutions. The company thus offers a wide range of services in the field of building technology and positions itself as a competent partner for customers in the region.

Sheet Metal WorkSolar & Photovoltaics
View profile4.4(11)
Gerspach AG Logo

Gerspach AG 

Basel · Since 1931

The core activity of Gerspach AG is the procurement and distribution of energy, particularly in the form of heating oil, gasoline, diesel, wood and coal, as well as the supply of service stations and the provision of energy for private households, commerce and industry.

Energy SuppliersWholesale - Fuels & Petroleum Products
View profile4.2(11)
GETREIDEZÜCHTUNG PETER KUNZ, Verein für Kulturpflanzenentwicklung Logo

GETREIDEZÜCHTUNG PETER KUNZ, Verein für Kulturpflanzenentwicklung 

Feldbach · Since 2000

The core activity of Getreidezüchtung Peter Kunz (gzpk) is the development and breeding of crops, particularly cereals and legumes, for organic farming. The company focuses on breeding adaptable plants for a resilient food system and works closely with farmers, organizations, and networks.

Sustainability Sector
View profile4.5(11)
GratisWasser ARB AG Logo

GratisWasser ARB AG 

Zurich · Since 2023

The core activity of GratisWasser is to offer individually branded water to companies as a high-quality give-away with social added value. Through a partnership with the Swiss development organization Helvetas, every pallet of GratisWasser enables lifelong access to clean drinking water for people in need.

Sustainability Sector
View profile4.3(11)
Guignard Trading Transport GTT S.A. Logo

Guignard Trading Transport GTT S.A. 

Bellerive Vd · Since 1986

The core activity of GTT SA is the collection, transportation and processing of all types of waste. The company offers a wide range of services, including the provision of containers and compactors, winter road maintenance and waste disposal in the region. GTT SA positions itself as a specialist in environmentally friendly waste disposal and offers solutions to meet the needs of households, businesses and the public sector.

Waste Management Industry
View profile4.6(11)
Haldi Bedachungen AG Logo

Haldi Bedachungen AG 

Lucerne · Since 1999

The company's core activity is facade construction, particularly the planning, execution and maintenance of facades, roofs and related services such as sheet metal work, solar systems, roof windows and lightning protection. The company also offers renovation and conversion work in these areas.

RoofingSolar & Photovoltaics
View profile5(11)
Hediger Recycling AG Logo

Hediger Recycling AG 

Büron · Since 1989

The core activity of Hediger Recycling AG is the provision of recycling and waste management services, including the collection, transportation and processing of waste, as well as the provision of skip rental and transportation services.

Waste Management IndustryLogistics & Transport Companies
View profile4.4(11)
HELVETIA ENVIRONNEMENT GROUPE SA Logo

HELVETIA ENVIRONNEMENT GROUPE SA 

Carouge Ge · Since 2009

HELVETIA ENVIRONNEMENT GROUPE SA provides integrated waste management services for municipalities, public and private companies, and private individuals. Its activities include collection and services, recycling and material recovery, and converting waste into energy.

Waste Management Industry
View profile4.2(11)
HSH Installationstechnik AG Logo

HSH Installationstechnik AG 

Sennwald · Since 1996

The core activity of HSH Installationstechnik AG encompasses the planning, installation, and maintenance of various technical systems, particularly: Heating systems (heat pumps, wood/pellets, oil/gas, district heating), Sanitary technology (new construction, renovation, and conversion, pipeline construction, water supply, gas pipeline construction, pool construction/wellness construction), and Ventilation systems (hygienic air conditions). The company also provides planning services for these systems, including heating planning, ventilation planning, and sanitary planning.

Solar & Photovoltaics
View profile4.9(11)
Huber Kanalservice AG Logo

Huber Kanalservice AG 

Samstagern · Since 2020

The core activity of Kanalservice Huber AG is professional sewer cleaning and maintenance, including disposal of wastewater and oily waste, as well as conducting tightness tests and sewer rehabilitation. The company also offers a 24/7 emergency service for sewer and pipe cleaning.

Waste Management Industry
View profile5(11)
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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.