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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

EF

Elektro Furrer AG 

Lucerne · Since 2017

Solar & Photovoltaics
View profile5(13)
HS

Helios Swiss Solution AG 

Herisau · Since 1994

Solar & Photovoltaics
View profile5(9)
AA

Alp-Hydro AG 

Sion · Since 1998

The core activity of HYDRO Exploitation SA is the planning, construction, maintenance and operation of hydroelectric power plants, including the rehabilitation and new construction of facilities, as well as the provision of services in the fields of electrical engineering, mechanics and hydraulic engineering. The company also offers engineering services, such as conducting studies, analyses and simulations, as well as the creation of projects and the operation of laboratories.

Energy Suppliers
View profile4.7(7)
BE

Bütler Elektro Telecom AG 

Sins · Since 2019

Solar & Photovoltaics
View profile4.2(6)
EK

Elektro Kleiner AG 

Heerbrugg · Since 2009

Solar & Photovoltaics
View profile5(3)
IS

ISPAG, Succursale de Issa S.A. 

Vaulruz · Since 2022

Waste Management Industry
View profile5(3)
SA

Swisselko AG 

Spiez · Since 2021

Solar & Photovoltaics
View profile5(2)
DS

DM-Green SA 

Ogens · Since 2017

Waste Management Industry
View profile5(1)
Studio Nolimits GmbH Logo

Studio Nolimits GmbH 

Zurich · Since 2022

The core activity of 1A-Energy is the planning, consulting and implementation of sustainable energy projects, particularly in the field of solar energy (photovoltaics) and energy-optimized building. This also includes services such as energy consulting, planning services, project management and the implementation of building projects that utilize the natural energy resources of the site.

Solar & Photovoltaics
View profile
1H2O3 GmbH Logo

1H2O3 GmbH 

Lucerne · Since 2018

The company 1H2O3 specializes in the development, manufacture, and distribution of plants and systems for water treatment and processing. The company's core activity includes the design, production, and delivery of compact and modular solutions for the treatment of wastewater, drinking water, aquaculture, and aquaponics. The company's product range includes, among others: biological treatment plants, chemical dosing plants, filtration plants, pre-treatment plants, lamellar clarifiers, UV disinfection plants, and Skid REUT (Reuse of Water) systems. The company also offers customized solutions for various applications, including municipal and industrial wastewater treatment, aquaculture, and aquaponics.

Sustainability Sector
View profile
2000-Watt-Smart-Cities Association Logo

2000-Watt-Smart-Cities Association 

Zurich · Since 2018

The core activity of 2000-Watt Smart Cities is to advise and support cities and municipalities in the implementation of sustainable and intelligent urban development projects. This includes services such as coaching, capacity building, consulting and certification in the areas of Smart Governance, Smart Centrality, Smart Mobility, Smart Energy and Environment, Smart Buildings and Smart Food Production. The company also provides technical expertise and support in the implementation of projects.

Sustainability Sector
View profile
3C Finanz AG Logo

3C Finanz AG 

Chur · Since 2007

Sustainability Sector
View profile
4E GmbH Eck Engeler Erneuerbare Energien Logo

4E GmbH Eck Engeler Erneuerbare Energien 

Steckborn · Since 2011

Technical Consulting & EngineeringSustainability Sector
View profile
ABC Recycling AG Logo

ABC Recycling AG 

Lommiswil · Since 2004

Waste Management IndustryMetal Industry
View profile
A bis Z Industrieautomation, Brühwiler Milo Logo

A bis Z Industrieautomation, Brühwiler Milo 

Andwil Sg · Since 2004

The core activity of A bis Z Elektro is the planning, installation and maintenance of electrical systems, as well as the sale of electrical products, including LED lighting, photovoltaic systems and Sonos sound systems. Additionally, the company offers disposal services.

Solar & Photovoltaics
View profile
Addario Transporte AG Logo

Addario Transporte AG 

Hochdorf · Since 2010

The core activity of Addario Transporte is the transportation and disposal of special waste and hazardous goods, particularly for automotive, industrial and gastronomic businesses, in compliance with legal regulations and environmentally friendly standards.

Waste Management IndustryLogistics & Transport Companies
View profile
MEDI ETANCHEITE SARL Logo

MEDI ETANCHEITE SARL 

Plan-Les-Ouates · Since 2006

Solar & Photovoltaics
View profile
ADT Energy Contractor SA Logo

ADT Energy Contractor SA 

Cadempino · Since 2010

The company Adt energy contractor offers services in the field of energy efficiency and environmental protection. The core activities include: Consulting and analysis of energy consumption and efficiency of buildings; Design and installation of new heating systems and energy efficiency systems; Maintenance and management of existing heating systems and energy efficiency systems; Conducting energy audits and diagnostics to identify energy losses and optimization opportunities; Development of solutions to reduce energy costs and consumption; Offering leasing models for financing energy efficiency measures. The company focuses on the use of renewable energies and the reduction of CO2 emissions.

Technical Consulting & EngineeringSustainability Sector
View profile
Agrobio Conseils SA Logo

Agrobio Conseils SA 

Charrat · Since 2010

Sustainability Sector
View profile
AGROGAS Furttal AG Logo

AGROGAS Furttal AG 

Dällikon · Since 2008

Energy Suppliers
View profile
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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.