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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

Zentralwärme Ost AG Logo

Zentralwärme Ost AG 

Schindellegi · Since 2021

Zentralwärme Ost AG is an energy supplier specializing in district heating solutions using renewable biomass (log wood, pellets or wood chips), offering consulting, system planning, installation, maintenance and financing services for heating systems.

Energy Suppliers
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Zenyt Energie AG Logo

Zenyt Energie AG 

Buchs Sg · Since 2023

Zenyt Energie AG designs, plans and installs photovoltaic (PV) systems and provides consultation, installation, maintenance and cleaning services, including energy-control solutions to optimize self-consumption.

Solar & Photovoltaics
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Zeppelin JLH AG Logo

Zeppelin JLH AG 

Bottmingen · Since 2020

The core activity of Zeppelin JLH AG is the execution of dismantling and demolition work in industrial, commercial and residential buildings, in particular: dismantling and demolition of steel structures, tank facilities, heating, ventilation and air conditioning systems as well as chemical plants; disposal of contaminated materials, including PCB-containing tanks, tar insulation and chemical coatings; tank cleaning and disposal, including pumping and cleaning of oil tanks; installation of new facilities under difficult conditions; and professional disposal of hazardous substances and deregistration with authorities and water protection agency.

Waste Management Industry
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Zero Edition GmbH Logo

Zero Edition GmbH 

Chur · Since 2021

The core activity of Zero Edition is the assessment of real estate risks, particularly in terms of transition risks in real estate financing, with the aim of preserving the real estate value in the future and not letting it fall due to political measures, technical progress and changed market sentiments.

Technical Consulting & EngineeringSustainability Sector
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ZeroWaste Switzerland Logo

ZeroWaste Switzerland 

Cottens Vd · Since 2020

The company's core activity is the promotion and implementation of zero-waste practices and sustainable resource use in businesses, communities and society, with the goal of promoting environmental protection and sustainability.

Sustainability Sector
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ZHAM GmbH Logo

ZHAM GmbH 

Zurich · Since 2022

The core activity of ZHAM is the development, production and marketing of environmentally friendly cleaning products in the form of concentrates, packaged in glass bottles that can be recycled after use. The company offers an innovative solution for reducing single-use plastic and waste in households.

Sustainability Sector
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ZHC Holding AG Logo

ZHC Holding AG 

Altendorf · Since 2015

The core activity of Zurich Holding Company (ZHC) is the investment and management of fixed-income assets in Europe, particularly in the area of commercial real estate and renewable energy, such as solar energy.

Sustainability Sector
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Ziegelei H. Deponie AG Logo

Ziegelei H. Deponie AG 

Römerswil Lu · Since 2000

Waste Management Industry
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Zillig GmbH Logo

Zillig GmbH 

St. Gallen · Since 1993

The core activity of Zillig GmbH is the planning, installation and repair of sanitary facilities, particularly in the area of bathroom renovations, as well as the execution of plumbing work, solar systems and lightning protection systems.

Sheet Metal WorkSolar & Photovoltaics
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Zincarlin Sagl Logo

Zincarlin Sagl 

Morbio Superiore · Since 2005

The company is primarily active in the fields of tourism and sustainable development. It offers services such as promoting climate protection, developing sustainable projects, supporting companies in implementing Corporate Social Responsibility (CSR), and promoting barrier-free vacations. It also works on developing digital platforms to foster collaboration between companies and the community.

Sustainability Sector
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Zirkular GmbH Logo

Zirkular GmbH 

Basel · Since 2020

The core activity of Zirkular is to advise and support real estate developers and architects in planning and implementing construction projects in the field of circular economy, particularly in the reuse of building components and the preservation of existing buildings.

Sustainability Sector
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zirkulit Beton AG Logo

zirkulit Beton AG 

Kloten · Since 2023

zirkulit Beton AG distributes circular concrete, including the product families zirkulit beton® and zireco beton®. The concrete is produced according to SN EN 206 and SIA 2030:2021, has technical properties equivalent to primary concrete, and is used in standard strength classes up to C30/37 for various building elements.

Sustainability SectorGlass, Ceramics, Stone & Construction Materials Industry
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Zmotec Solartechnik GmbH Logo

Zmotec Solartechnik GmbH 

Saanen · Since 2009

The core activity of ZMOTEC Solartechnik GmbH is the planning, installation and distribution of thermal solar systems and wood boilers for hot water preparation.

Solar & Photovoltaics
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ZO Green AG Logo

ZO Green AG 

Hinwil · Since 2005

The core activity of ZO Green AG is composting and operating a composting plant in Hinwil. The company also offers an event and party room for occasions and events, but the main activity appears to be composting.

Waste Management Industry
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ZOKI Räumungen Dulic Logo

ZOKI Räumungen Dulic 

Affoltern Am Albis · Since 2024

The core activity of Zoki Express Räumungen is the execution of clearings, disposal and recycling. This includes in particular: Clearing of residential and commercial premises, Disposal of waste and no longer needed items, Recycling of materials wherever possible to minimize environmental impact. The company offers a comprehensive service that ranges from planning to execution of clearing and disposal and adapts to the individual needs of customers.

Waste Management Industry
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zoontec AG Logo

zoontec AG 

Lucerne · Since 2014

The core activity of zoontec AG is the planning, implementation and maintenance of innovative energy systems for buildings and areas, with a focus on energy efficiency, sustainability and the use of synergies between energy and communication. This includes in particular the areas of: * Energy concepts and planning for buildings and areas * Implementation of renewable heating systems and solar power plants * Development of intelligent solutions for hot water management and distribution * Consulting and planning for heating, ventilation, air conditioning, sanitation and electrical systems * Online energy billing and management The company aims to make buildings and areas sustainable and efficient by offering innovative energy systems and solutions that save resources and reduce costs.

Sustainability Sector
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Zorom AG Logo

Zorom AG 

Baar · Since 2021

The core activity of the company Zorom is the recycling and trading of metals, including ferrous and non-ferrous metals, as well as the disposal of electronic waste, batteries and aircraft wreck parts. The company provides comprehensive services for the recycling industry, including the collection, processing and marketing of recycled metals.

Waste Management Industry
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Züger Entsorgung + Recycling AG Logo

Züger Entsorgung + Recycling AG 

Galgenen · Since 2008

Züger Entsorgung + Recycling AG provides waste disposal and recycling services, including collection and processing of frying oil, green waste, and disposal services for restaurants and hotels. The company operates a biogas plant and is involved in biodiesel sales, marketing and consulting.

Waste Management Industry
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Zumtec GmbH Logo

Zumtec GmbH 

Sissach · Since 2012

Zumtec GmbH develops, manufactures and trades products for environmental engineering. The company offers solutions for environmental protection, energy, recycling and waste disposal.

Sustainability SectorWaste Management Industry
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Zürcher Kies und Transport AG Logo

Zürcher Kies und Transport AG 

Zuzwil Sg · Since 1996

The core activity of Zürcher Kies und Transport AG encompasses the areas of transport, disposal, recycling, landfills, gravel and natural stones. Specifically, the company offers the following services: * Transport of goods with tipper and dump trucks, crane, special and heavy-duty vehicles * Disposal and recycling of mineral materials such as paving, concrete, gravel, natural stones and mixed demolition waste * Operation of recycling facilities and landfills * Processing of materials into quality-controlled products * Logistics and collection service for construction materials and stone products * Remediation of contaminated sites and project management The company positions itself as a sought-after partner in the areas of transport, disposal and recycling.

Waste Management IndustryLogistics & Transport Companies
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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.