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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

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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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.