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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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9'016 companies found

CleanCarbonConversion Holding AG Logo

CleanCarbonConversion Holding AG 

Pfäffikon Sz · Since 2015

The core activity of CleanCarbonConversion AG is the development, manufacture and marketing of UHTH systems (Ultra-High-Temperature-Hydrolysis), which convert waste materials and biomass into clean, energy-rich synthesis gas. The company thus provides a solution for waste disposal and energy generation by converting waste into a valuable resource.

Sustainability Sector
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cleanosign GmbH Logo

cleanosign GmbH 

Härkingen · Since 2021

The core activity of cleanosign is the cleaning, maintenance and conceptualization of photovoltaic systems in Switzerland. This includes in particular: * Professional cleaning of solar modules to ensure their maximum performance and lifespan. * Periodic control flights using drone technology to monitor the condition of the systems and identify potential problems. * Creation of customized concepts for planning, optimization and life extension of photovoltaic systems. * Thermographic inspections to document the condition of the systems and identify potential problems. The company offers these services to both private and business customers, focusing on promoting a clean and efficient energy future.

Sustainability Sector
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Clean Power Synergy AG Logo

Clean Power Synergy AG 

Grosswangen · Since 2018

The core activity of Clean Power Synergy AG is consulting and financing projects in the field of renewable energies, particularly in the areas of photovoltaics, electromobility and energy efficiency. The company also offers contracting services, where it takes over the planning, implementation and financing of energy projects.

Sustainability Sector
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Cleantech Businesspark AG Logo

Cleantech Businesspark AG 

Deitingen · Since 2015

The core activity of Cleantech Businesspark AG is to provide spaces and infrastructure for founders and companies specializing in applied future technologies, particularly in the cleantech industry. The company operates a startup center and innovation forum that brings together companies and research institutions to promote innovations and sustainable technologies.

Sustainability Sector
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Cleantech21 Foundation Logo

Cleantech21 Foundation 

Zurich · Since 2007

The core activity of Cleantech21 Foundation (C21) is to promote environmental protection and sustainability through the development and implementation of Cleantech solutions, policy innovations, and technological advancements. The company focuses on the themes of Sustainable Development, Cleantech, Climate and Biodiversity Crisis, Sustainable Market Economy, Policy Innovation, and Technological Innovation. C21 engages in research, thought leadership, and project development aimed at driving the market for sustainable solutions. The company collaborates with partners to mobilize resources for project development and provides consulting and support services to companies and organizations committed to sustainability and environmental protection. The core activities of C21 include: * Research and development of Cleantech solutions * Policy innovation and lobbying for sustainable policies * Technological innovation and development of new technologies * Project development and implementation in the field of sustainability and environmental protection * Consulting and support services for companies and organizations in the field of sustainability and environmental protection.

Sustainability Sector
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Clearex Schweiz AG Logo

Clearex Schweiz AG 

Engelberg · Since 2009

Clearex Schweiz AG provides mobile on-site treatment and dewatering of sludges from separator and retention systems using specialised vehicles with a chemical-physical process that yields water compliant with Swiss discharge rules. The company offers suction and disposal, flushing and recovery, maintenance and inspection of oil and grease separators, CCTV and sewer rehabilitation, leak testing and reporting for clients such as restaurants, industry, service stations, workshops and municipalities.

Waste Management Industry
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Clearex Schweiz AG Logo

Clearex Schweiz AG 

Füllinsdorf · Since 2009

Clearex Schweiz AG provides mobile treatment and disposal of liquid wastes and sludges using specialized vehicles and an on‑site physico‑chemical process. The company carries out inspection, cleaning and maintenance of separators (e.g. oil and grease), leak testing, documentation and monitoring, offering disposal and service solutions for hospitality, industry, service stations and public clients.

Waste Management Industry
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CLEVAR GmbH Logo

CLEVAR GmbH 

Sargans · Since 2021

The core activity of CLEVAR GmbH is the planning, consulting and implementation of solar systems and photovoltaic projects, particularly with the aim of optimizing the self-consumption of renewable energy. This also includes the installation of heat inputs and the integration of storage systems to efficiently convert excess solar power into heat.

Solar & Photovoltaics
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Climacrux GmbH Logo

Climacrux GmbH 

Kastanienbaum · Since 2020

The core activity of Climacrux is the development of products and services aimed at accelerating the path to a sustainable future, particularly through the promotion of carbon removal and the provision of solutions for reducing CO₂ emissions. This includes the development of platforms and services such as Carbon Removed, CO₂ removal API, and Boutique CO₂ removal, which enable individuals, companies, and family offices to reduce their CO₂ emissions and achieve sustainable goals.

Sustainability Sector
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Climacy SA Logo

Climacy SA 

Bussigny · Since 2022

The core activity of Climacy is the development and implementation of renewable energy solutions, particularly in the field of solar energy. Specifically, the company offers two main products: 1. **Solar Tiles**: A solution that enables existing roofs to be equipped with solar modules to generate electricity and feed it back into the grid. 2. **Heating**: A solution based on heat pumps to heat buildings and contribute to the energy transition. Additionally, Climacy offers a comprehensive solution called **Solar Smart Roof**, which combines insulation, solar energy, and aesthetics, suitable for both private and industrial and agricultural buildings.

Solar & Photovoltaics
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Clima Now Logo

Clima Now 

Zurich · Since 2021

The core activity of Clima Now is the promotion of climate protection projects and the support of start-ups that focus on the development of sustainable and environmentally friendly solutions to combat climate change and create a greener future.

Sustainability Sector
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Climetech AG Logo

Climetech AG 

Fläsch · Since 2022

The core activity of Climetech AG encompasses four main areas: 1. **Industrial Project Management**: The company provides services for planning, controlling, and executing complex industrial projects, focusing on financial efficiency, timely completion, and operational excellence. 2. **Independent Consulting Services**: Climetech AG offers independent consulting services aimed at evaluating and implementing new technologies, developing digitalization strategies, and optimizing resources and processes. 3. **Sustainable Corporate Development**: The company supports clients in reducing their CO2 footprint and integrating technologies compatible with climate-positive goals. 4. **Board Member Expertise**: Climetech AG's founder, Aron Graf, offers his services as a member of corporate boards, focusing on sustainable strategies and technology integration to support companies in achieving their objectives.

Sustainability Sector
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CN Commodity SA Logo

CN Commodity SA 

Geneva · Since 2021

CN Commodity SA is the company behind the Carbon Offset Certification label and operates a standardised auditing and certification process for carbon offsetting of commodity transactions, products and services. Services include GHG calculation, independent verification, offsetting via retirement of third‑party certified credits, a digital registry/portal and advisory access to voluntary carbon markets.

Management ConsultingSustainability Sector
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CO2 Energie AG Logo

CO2 Energie AG 

Baden · Since 2021

The core activity of CO2 Energie AG is the liquefaction and utilization of CO2 generated during biogas production. The company operates a CO2 liquefaction plant, where the separated CO2 is liquefied and made available as an industrial gas for further use. This process enables the conversion of up to 90 percent of the CO2 that would otherwise escape into the atmosphere into a valuable product.

Sustainability Sector
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CO2-monitor AG Logo

CO2-monitor AG 

Zurich · Since 2008

CO2-monitor AG supports corporations, organisations and local governments in integrating environmental and social sustainability into their core values and operations. Services include employee engagement, leadership-team sustainability coaching, and advisory support for transitioning from reporting to embedded sustainability practices.

Management ConsultingSustainability SectorWeb Portals & Platform Companies
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COBRI AG Logo

COBRI AG 

St. Gallen · Since 2009

The core activity of COBRI AG encompasses two main areas: 1. **Management Consulting**: The company provides consulting services to businesses in the areas of business field development, realignment, succession planning, and generalist tasks. 2. **Energy Consulting**: COBRI offers specialized consulting services for renewable energies, particularly for properties and infrastructures. This includes impulse consulting, concept development for building modernizations, on-site consulting, and tender comparisons.

Management ConsultingSustainability Sector
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Colortech AG Logo

Colortech AG 

Baar · Since 2000

The core activity of Colortech AG is the development and application of environmentally friendly powder coating solutions for various industries and private customers. The company offers individual solutions for the surface refinement of metal parts, machines, vehicle parts, architectural elements and other products, with a focus on sustainability, corrosion protection, durability and a flawless finish.

Sustainability Sector
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COMBA Energies SA Logo

COMBA Energies SA 

Arbaz · Since 2009

The core activity of the company is the management and administration of a municipality (Commune d'Arbaz) in the canton of Valais, Switzerland. The activities include, among others: public services such as population control, social services and tax administration; tourism promotion through the Office du Tourisme Anzère; management of public facilities such as schools, libraries and sports facilities; support for local businesses and organizations; and provision of information and services to the population, such as energy supply, transport and mobility.

Energy Suppliers
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CommTech CTS SA Logo

CommTech CTS SA 

Corminboeuf · Since 2014

The core activity of CommTech CTS SA is the development and implementation of systems for optimizing and regulating energy consumption, particularly in the field of building automation and the renewable energy sector. The company offers solutions for self-consumption, energy storage through accumulation, and the integration of solar energy. The focus is on developing intelligent systems that optimize energy consumption and improve building efficiency.

Solar & Photovoltaics
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Composite Recycling SA Logo

Composite Recycling SA 

Ecublens Vd · Since 2021

The core activity of Composite Recycling is the development and provision of services and technologies for the recycling of composite materials, particularly glass fiber and carbon fiber composites. This includes conducting recycling tests, audits and industrial calibration studies, providing mobile recycling units for the recycling of composite materials, selling recycled raw materials such as glass fibers and thermolysis oil, as well as consulting and networking services for manufacturers seeking to implement sustainable production processes.

Sustainability Sector
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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.