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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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9'016 companies found

Wasserversorgungsgenossenschaft Ursenbach Logo

Wasserversorgungsgenossenschaft Ursenbach 

Ursenbach · Since 1932

The company's core activity is the extraction and supply of drinking water from its own sources.

Water Supply
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Wasserversorgungsgenossenschaft Zweisimmen Logo

Wasserversorgungsgenossenschaft Zweisimmen 

Zweisimmen · Since 1901

The core activity of Wasserversorgungsgenossenschaft Zweisimmen (WVGZ) is the supply of households and businesses with drinking water. This includes the extraction, treatment, distribution and sale of drinking water, as well as the maintenance and upkeep of the water supply infrastructure.

Water Supply
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Wasserversorgung Utzigen - Genossenschaft Logo

Wasserversorgung Utzigen - Genossenschaft 

Utzigen · Since 1932

The core activity of Wasserversorgung Utzigen is the extraction, treatment and distribution of drinking water to the population, commercial, industrial and service companies in the Utzigen region. This also includes the expansion and maintenance of water supply systems as well as ensuring the quality of drinking water in accordance with legal requirements.

Water Supply
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Wasserversorgung Wasseramt AG Logo

Wasserversorgung Wasseramt AG 

Derendingen · Since 2021

Water Supply
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Wasserwerk Wengen Genossenschaft Logo

Wasserwerk Wengen Genossenschaft 

Wengen · Since 1921

Wasserwerk Wengen Genossenschaft operates and ensures the provision of public water services, covering drinking, utility and firefighting water, with operational responsibilities managed by officers such as a president, a secretary and a Brunnenmeister.

Water Supply
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WasteFlow SA Logo

WasteFlow SA 

Lausanne · Since 2024

WasteFlow SA develops an AI-driven monitoring and optimization system for waste sorting and recycling facilities, providing real-time material characterization, mass estimation, dangerous-object detection and operational recommendations, delivered as integrated hardware and software.

Waste Management Industry
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WasteOlas Sàrl Logo

WasteOlas Sàrl 

Petit-Lancy · Since 2022

The core activity of WasteOlas is the development and implementation of systems for capturing and recycling CO2 emissions, particularly in the brewing industry. The company offers solutions to reduce, recycle and convert CO2 emissions into valuable resources, thereby supporting breweries in achieving their sustainability goals.

Sustainability Sector
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WATALUX SA Logo

WATALUX SA 

Geneva · Since 2014

The core activity of WATALUX is the development and distribution of simple, affordable and sustainable solutions for the needs of water, hygiene and sanitation for disadvantaged populations.

Sustainability Sector
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watercat systeme Gunter Berschl Logo

watercat systeme Gunter Berschl 

Scherzingen · Since 2012

The core activity of watercat-systeme is the development, manufacture and distribution of systems for water treatment, particularly for the decalcification and lime treatment of drinking water. The company offers both classic decalcification plants and physical lime treatment systems to remove lime and impurities from the water, thereby improving the quality of the water.

Water Supply
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Water Technology Solution SA Logo

Water Technology Solution SA 

Puidoux · Since 2005

The core activity of Water Technology Solution SA is the development, manufacture and marketing of systems for water supply, wastewater disposal and treatment, particularly cast iron pipes and connections for the construction and water sectors.

Water SupplyMetal Industry
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watt elec jura sa Logo

watt elec jura sa 

Porrentruy · Since 2023

watt elec jura sa is an electrical services company that designs, installs and services electrical and energy systems. Its offerings include high- and low-voltage installations, photovoltaic systems, e-mobility charging solutions, project studies and planning, and maintenance contracts with a focus on energy optimization.

Electrical Planning & InstallationSolar & Photovoltaics
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Wattimmo SA Logo

Wattimmo SA 

Les Acacias · Since 2023

The company wattimmo.com is an online real estate portal that enables users to search, view and evaluate properties. The core activity of the company is to provide an online platform for the real estate market.

Technical Consulting & EngineeringEnergy Suppliers
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wattss AG Logo

wattss AG 

Frauenfeld · Since 2024

wattss AG designs, plans and installs modular battery storage systems and energy management solutions for commercial and industrial customers. Its portfolio includes Pixii‑based systems and product platforms such as PowerShaper and PowerBase, complemented by services from feasibility studies and financing to commissioning and after‑sales support. Common applications include peak shaving, PV+storage, backup power, EV charging and load management.

Technical Consulting & EngineeringEnergy Suppliers
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WaVeritas AG Logo

WaVeritas AG 

Zurich · Since 2020

The core activity of WaVeritas is to provide services in the field of sustainable investments and ESG management (Environmental, Social and Governance). This includes in particular: conducting qualitative and quantitative research activities in the ESG field, developing strategies and processes for sustainable investments, integrating ESG criteria into customers' investment decisions, creating ESG ratings and conducting due diligence reviews, providing solutions for compliance with ESG regulations and guidelines, supporting customers in managing ESG risks and opportunities, and developing impact investing strategies and identifying investment opportunities in the field of sustainable investments.

Management ConsultingSustainability Sector
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WeatherXM AG Logo

WeatherXM AG 

Zug · Since 2022

The company develops and operates a global network of weather stations driven by the combination of IoT technology, Web3, and an active community of station owners. The company's core activity is the collection and provision of weather data for various industries such as insurance, agriculture, energy, and transportation, to support them in emergency preparedness, environmental monitoring, and climate adaptation.

Sustainability Sector
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Weber Advisory Logo

Weber Advisory 

Solduno · Since 2015

Weber Advisory primarily focuses on facilitating investment opportunities in the field of green energy. They connect investors with asset managers and investment companies specializing in green energy projects. The goal is to enable investments that not only generate high returns but also contribute to reducing CO2 emissions and protecting the environment.

Sustainability Sector
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Weber Clay GmbH Logo

Weber Clay GmbH 

Bünzen · Since 2022

The core activity of Weber Clay GmbH includes land cleaning services, specifically: vacuuming waste, leaf blowing, crane work, land cleaning after major events such as festivals and events, removal of small trees and telephone poles, root stock milling and tree care. The company thus offers a wide range of services in the field of land cleaning and maintenance, particularly in connection with major events and land maintenance.

Waste Management Industry
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wega & sunergy gmbh Logo

wega & sunergy gmbh 

Diepoldsau · Since 2006

wega & sunergy gmbh provides project development, engineering, strategic consulting and project implementation for wind and photovoltaic projects, with services including site potential analyses, wind measurements (mast and LIDAR), yield assessments, permitting support, environmental impact studies and operation of solar partnership installations.

Technical Consulting & EngineeringSolar & Photovoltaics
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WeGaw SA Logo

WeGaw SA 

Lausanne · Since 2016

The core activity of Wegaw SA is the development and provision of digital solutions for the energy industry, particularly in the field of hydropower. By combining geospatial data, artificial intelligence and hydrological models, Wegaw offers products and services that enable energy companies to optimize their production and trading strategies, minimize risks and improve their climate resilience.

Sustainability Sector
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Weiss und Partner GmbH Logo

Weiss und Partner GmbH 

Münchenstein · Since 2015

The core activity of Weiss & Partner encompasses services in the construction and real estate management sector, including: High-rise and civil engineering, Property management, Garden design and maintenance, Painting and roofing, Metal construction work, Dismantling, deregistration and disposal of old oil tanks, Facility management, Final cleaning of apartments with acceptance guarantee, Janitorial services, Special cleaning. The company thus offers a wide range of services for construction and real estate projects.

Building ConstructionCivil EngineeringHorticulture & Landscaping
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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.