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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

amiante-démolition Vonlanden sa Logo

amiante-démolition Vonlanden sa 

Romanel-Sur-Morges · Since 2011

The core activity of the company "Vonlanden sa" is asbestos removal (désamiantage) and building demolition. The company offers specialized services for asbestos removal and building dismantling, particularly for properties built before 1991.

Waste Management Industry
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AMPA AG Logo

AMPA AG 

Pohlern · Since 2019

The core activity of AMPA AG is the planning, execution and servicing of electrical installations, building automation, network technology, photovoltaic systems, energy management and electromobility. This also includes the planning and installation of telephone and communication systems as well as telematics and multimedia systems.

Solar & Photovoltaics
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Ampere Dynamic Schweiz GmbH Logo

Ampere Dynamic Schweiz GmbH 

Zurich · Since 2020

Ampere Dynamic Schweiz GmbH develops and implements large-scale energy solutions for industrial and commercial clients, including photovoltaic systems, battery storage and charging infrastructure for electric mobility. The company provides energy consulting, engineering and construction, overall project management, operational monitoring and energy marketing services.

Solar & Photovoltaics
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Amperium Switzerland AG Logo

Amperium Switzerland AG 

Baar · Since 2023

Amperium Switzerland AG distributes and licenses battery storage systems and solar products from AlphaESS for residential, commercial and large-scale projects. The company operates a training centre, certifies partner installers and provides system integration, energy-management solutions and spare-part and service support.

Sustainability Sector
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Amsler Solar GmbH Logo

Amsler Solar GmbH 

Wölflinswil · Since 2011

The core activity of Amsler Solar GmbH is the planning and installation of photovoltaic systems for various building types, including single-family homes, farms and industrial buildings, to enable decentralized energy supply with solar power.

Solar & Photovoltaics
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Anacquaria SA Logo

Anacquaria SA 

Tenero · Since 1983

The core activity of Anacquaria SA is the treatment and processing of water, particularly through the development and implementation of customized systems for drinking water treatment. In addition, the company offers a wide range of products and services in the fields of air (measuring instruments, flue gas cleaning systems) and environment (analyses and consulting).

Water Supply
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Anderes Heizungstechnik AG Logo

Anderes Heizungstechnik AG 

Weinfelden · Since 1991

The core activity of Anderes AG is the planning, implementation and installation of heating systems, including heating renovations, installation of heating systems, flushing of heating systems, planning and consulting, as well as the installation of alternative systems such as heat pumps, solar energy, wood-fired heating systems and general refrigeration and heat technology.

Plumbing & Building ServicesSolar & Photovoltaics
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Andermatt Group AG Logo

Andermatt Group AG 

Grossdietwil · Since 2011

The core activity of Andermatt Group is the development, production and marketing of biological products for agriculture, horticulture and beekeeping. The company specializes in the production of biological means for pest control, fertilization and plant and bee health.

Sustainability Sector
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Andrea Berrone ingegneria ambientale Logo

Andrea Berrone ingegneria ambientale 

Lugano · Since 2018

The core activity of Berrone.ch is environmental consulting and the development of projects in the field of renewable energy. In particular, the company offers services such as environmental assessments, remediation of contaminated sites, environmental modeling and noise assessments.

Sustainability Sector
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ANDREIOS AG Logo

ANDREIOS AG 

Widnau · Since 2013

ANDREIOS AG is a real estate project developer offering land acquisition, feasibility and profitability analyses, and comprehensive project development. The company supports projects from concept and planning through procurement to construction, coordinating with architects, construction managers and investors.

Sustainability Sector
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Andres Hausammann Sanitär, Heizung & Solaranlagen Umbauten Neubauten Reparaturen und Boilerentkalkungen Logo

Andres Hausammann Sanitär, Heizung & Solaranlagen Umbauten Neubauten Reparaturen und Boilerentkalkungen 

Steg Im Tösstal · Since 1991

The core activity of Hausammann Haustechnik is the provision of services in the field of sanitary and heating technology, including the installation, maintenance and repair of sanitary and heating systems, as well as the planning and implementation of systems with renewable energies such as solar systems and heat pumps.

Solar & Photovoltaics
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aneco Logo

aneco 

Plan-Les-Ouates · Since 2021

The core activity of aneco is the ecological and sustainable management of wastewater through decentralized and environmentally friendly solutions, with the aim of utilizing the resources present in the wastewater and reintegrating humans into natural cycles.

Sustainability Sector
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Anna Carlevaro, Benthos Logo

Anna Carlevaro, Benthos 

Zurich · Since 2018

The core activity of Benthos is consulting and conducting aquatic ecological investigations and services, particularly in the fields of bioindication and species conservation, water assessment, environmental compatibility and GIS/data processing, with the aim of promoting environmental protection and sustainable aquatic ecology.

Technical Consulting & EngineeringSustainability Sector
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Anna Zemp-Stiftung für umfassenden Mitweltschutz (SUMS) Logo

Anna Zemp-Stiftung für umfassenden Mitweltschutz (SUMS) 

Männedorf · Since 1978

The core activity of the Anna Zemp Foundation is the promotion of biodiversity and nature education. It operates a nature garden where it preserves and promotes species diversity, and offers programs and activities to inspire people about nature and enable them to act responsibly.

Sustainability Sector
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ANOG Anergienetz Obergoms AG Logo

ANOG Anergienetz Obergoms AG 

Obergesteln · Since 2014

The core activity of ANOG Anergienetz Obergoms AG is the planning, construction and operation of a district heating network in Obergoms. The heat from the water of the Furka Tunnel is used to distribute and sell heating energy to customers in Oberwald/Obergoms.

Energy Suppliers
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Anticaro AG Logo

Anticaro AG 

Bäretswil · Since 1988

The core activity of Anticaro AG is the development, manufacture and marketing of lime and rust protection devices that reduce lime deposits in tap water without the use of chemicals or energy consumption, thereby extending the lifespan of devices and saving energy costs.

Sustainability Sector
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APALIFE GmbH Logo

APALIFE GmbH 

Baar · Since 2023

The core activity of Apalife is the reforestation of the Amazon rainforest, the trade in CO2 emission certificates, and the sustainable production of food products such as bee honey and Brazil nuts, in order to contribute to environmental protection and reduce CO2 emissions.

Sustainability Sector
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A. Pfenninger Pflanzen AG Logo

A. Pfenninger Pflanzen AG 

Wagenhausen · Since 1993

The company REGEN-USER.CH primarily deals with the sale and refurbishment of IBC containers (Intermediate Bulk Containers) for rainwater use, particularly for agriculture, horticulture, and food production. They also offer specialized solutions for aquaponics, aquaculture, and hydroponics.

Sustainability Sector
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Appenzeller Energiekonzept AG Logo

Appenzeller Energiekonzept AG 

Appenzell · Since 2021

Appenzeller Energiekonzept AG designs, engineers and delivers turnkey photovoltaic systems. The company also provides consulting and concept development for renewable energy, installs and operates electric vehicle charging infrastructure, and offers cleaning, maintenance and monitoring services for solar installations.

Solar & Photovoltaics
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Aprivis GmbH Logo

Aprivis GmbH 

Meilen · Since 2011

The core activity of Aprivis Aerial Thermography is the execution of inspections and monitoring using drone and thermography technology. The specific services include: Solar panel inspections, Roof and building inspections, and Wildlife rescue (e.g. deer rescue). The company relies on qualified personnel with corresponding licenses and certifications, such as EASA drone licenses and thermographic training.

Solar & Photovoltaics
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Aptus Solutions GmbH Logo

Aptus Solutions GmbH 

Altishofen · Since 2015

The core activity of Aptus Solutions GmbH encompasses two main areas: 1. **Solar and Building Technology**: The company offers solutions for photovoltaic systems, storage systems and self-consumption optimization, thermal imaging and protective components. It plans, installs and maintains solar systems for private and commercial customers. 2. **Event Technology**: Aptus Solutions GmbH provides sound systems and audio equipment for events such as open-air concerts, parties and festivals. It has professional audio systems and offers consulting, planning and implementation of event technology.

Electrical Planning & InstallationSolar & Photovoltaics
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AQUA ART AG Logo

AQUA ART AG 

Zurich · Since 1988

AquaClic, Aqua Art AG, develops and distributes water-saving showerheads and other sanitary products for private households, companies and municipalities. The company's core activity is the manufacture and distribution of environmentally friendly sanitary products, particularly showerheads that save water and energy. The company also offers personalized products and solutions for companies and municipalities to promote sustainability and brand presence.

Sustainability SectorGeneral Goods Production
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Aquagestion Sàrl Logo

Aquagestion Sàrl 

Châbles Fr · Since 2006

The core activity of Aquagestion Sàrl is to provide services in the field of water management, including: control and maintenance of drinking water infrastructure, detection and repair of water losses, consulting, sales and maintenance of pools and spas, consulting and sales of water treatment plants (water softeners), and online sales of maintenance products for pools and spas. The company thus offers a comprehensive range of services in the field of water management, from control and maintenance of drinking water infrastructure to consulting and sales of products for pools and spas.

Water Supply
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Aqua-Happiness Sàrl Logo

Aqua-Happiness Sàrl 

Yverdon-Les-Bains · Since 2024

Aqua-Happiness is engaged in the development and distribution of solutions for water treatment and optimization in various areas such as swimming pools, spas, thermal baths, households and public institutions. The core activity includes consulting, supply of equipment and technical support for the implementation of sustainable and innovative water treatment systems that aim to reduce chemicals and improve water quality.

Sustainability Sector
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Aqualife AG Logo

Aqualife AG 

Schwyz · Since 1996

The core activity of EnviProTec (Aqualife AG) is environmental protection and the development of technologies for environmental conservation.

Sustainability Sector
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AQUALITY AG Logo

AQUALITY AG 

Kaltbrunn · Since 2016

The core activity of AQUALITY AG is to provide services and products for water supply, particularly in the areas of: * Management of water supply systems (AQUAsupport) * Cleaning and disinfection of reservoir chambers and pipes as well as room disinfection (AQUAclean) * Inspection, well rehabilitation and renovation (AQUAplus) * Flow and pressure measurements (AQUApress) The company thus offers comprehensive solutions for the maintenance, servicing and optimization of water supply systems.

Water Supply
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aqua Partner AG Logo

aqua Partner AG 

Kölliken · Since 2019

The core activity of aquaPartner AG is the planning, construction, maintenance and operation of water supply systems, including the assumption of responsibility and quality management for drinking water quality, plant safety and availability. This also includes specific services such as standby services, sanitary services, well construction services and pipeline construction.

Water Supply
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Aquaplant Jodok Hunziker Logo

Aquaplant Jodok Hunziker 

Signau · Since 2022

The core activity of Aquaplant is the natural and sustainable design of gardens and water construction. This includes in particular the planning and execution of projects such as: natural water construction, water revitalization, biotopes, spring catchments, swimming ponds, dry stone walls, amphibian habitats, water retention (swales), stream restoration, and renaturation. In addition, the company also offers services in the field of permaculture and gardening, such as the creation of forest gardens and garden maintenance.

Sustainability Sector
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Aquaponik Fischfarm Schweiz Baur Logo

Aquaponik Fischfarm Schweiz Baur 

Turbenthal · Since 2023

The company's core activity is the sustainable production of food through aquaponics, an innovative method of vegetable and fish farming, where fish and vegetables are raised in a circular system to guarantee the highest quality and sustainability.

Sustainability Sector
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aquaregio ag Logo

aquaregio ag 

Sursee · Since 2018

The core activity of aquaregio ag is the supply of affiliated municipalities with drinking and utility water, including the operation and maintenance of primary facilities in the supply area.

Water Supply
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Aquarion AG Logo

Aquarion AG 

Zug · Since 2023

The core activity of AQUARION AG is the development, manufacture and implementation of water treatment systems and technologies, including process water treatment, wastewater treatment, water purification and recycling, as well as providing solutions for industry, particularly in the fields of pharmaceuticals, food and beverages, oil and gas, energy, mining, chemicals, steel and semiconductors.

Sustainability Sector
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Aquasolaire Sàrl Logo

Aquasolaire Sàrl 

Clèbes (Nendaz) · Since 2012

Aquasolaire Sàrl designs and installs solar thermal systems, providing system design, sizing, quotations, technical dossiers for subsidies and permitting, installation and maintenance. It also installs heating systems such as hydronic wood or pellet stoves and offers ventilation solutions and advisory services.

Solar & Photovoltaics
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Aqua Structura GmbH Logo

Aqua Structura GmbH 

Solothurn · Since 2009

The core activity of Aqua Structura is the development and distribution of products that improve the quality of tap water, particularly by restoring its natural structure and energy, to obtain vital and pleasant drinking water while reducing lime deposits in water pipes and appliances.

Water Supply
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AQUATECHNIQUE SA Logo

AQUATECHNIQUE SA 

Forel-Sur-Lucens · Since 2016

The core activity of Aquatechnique is the control, management and treatment of water, particularly through the installation of wells and irrigation systems, industrial filtration, drinking water pre-filtration, wastewater treatment and agricultural filtration.

Sustainability Sector
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AquaVallo GmbH Logo

AquaVallo GmbH 

Dällikon · Since 2018

The core activity of AquaVallo GmbH is water treatment, including maintenance and distribution of related products such as measurement and dosing systems as well as biocide products. The company also offers consulting and service for water projects and specializes in providing solutions for drinking water treatment, including legionella control.

Technical Consulting & EngineeringWater Supply
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ARA-Betreiber GmbH Logo

ARA-Betreiber GmbH 

Brugg Ag · Since 1995

ARA-Betreiber GmbH is a service company that operates and maintains wastewater treatment plants and other municipal and industrial disposal facilities. The company uses the short form SARA (Service Abwasser Reinigungs Anlagen) and states that it offers tailored operational know‑how to municipalities.

Waste Management Industry
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ARA Region Biel AG Logo

ARA Region Biel AG 

Brügg Be · Since 1993

The core activity of ARA Region Biel AG is wastewater treatment, particularly the treatment of wastewater from the Seeland region, as well as the utilization of sewage sludge and the assurance of water protection.

Waste Management Industry
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ara region bern ag Logo

ara region bern ag 

Bern · Since 1995

The company's core activity is wastewater treatment and biomass utilization, particularly the production of renewable energy through the processing of biogenic waste and sewage sludge in digesters to generate biogas.

Waste Management Industry
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AR Contracting SA Logo

AR Contracting SA 

Fleurier · Since 2022

The core activity of AR Contracting is the planning, installation and maintenance of solar systems as well as the construction of charging stations for electric vehicles. The company offers solutions for businesses and private households to reduce their energy costs and contribute to the transition to renewable energy sources.

Electrical Planning & InstallationSolar & Photovoltaics
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ARDEA Zürich GmbH Logo

ARDEA Zürich GmbH 

Zurich · Since 2023

ARDEA Zürich GmbH provides consultancy for energy solutions and district heating projects, supporting owners with planning, project management and construction supervision. Services include feasibility studies, energy optimisation and owner representation throughout project delivery.

Construction & Project ManagementSustainability Sector
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Argessa AG Logo

Argessa AG 

Ergisch · Since 1923

The company's core activity is the generation of electrical energy through the operation of a pumped storage hydroelectric power plant, particularly in the Leuk region. This also includes the maintenance and upkeep of the power plant facilities, including tasks such as dam monitoring, flushing, mowing and logging.

Energy Suppliers
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Argile - Delaleu & Agents Logo

Argile - Delaleu & Agents 

Sion · Since 2022

The core activity of Argile is to provide services in the field of digital sustainability and environmental compatibility, particularly in the areas of: Sustainable web development and design, Green IT consulting and auditing, Ecological IT practices, Data-driven ESG reporting, and Digital sustainability transformation. The company supports customers in developing sustainable digital solutions that are both environmentally friendly and efficient.

Sustainability Sector
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Argovia Energie AG Logo

Argovia Energie AG 

Baden · Since 1989

The core activity of Argovia Energie AG is the promotion and financing of nuclear energy production in Switzerland and the development of the next generation of nuclear power plants worldwide.

Energy Suppliers
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ARINAS ENVIRONMENT AG Logo

ARINAS ENVIRONMENT AG 

Zernez · Since 2005

The core activity of ARINAS environment AG is consulting and research in the field of environmental management, particularly in the areas of: Environmental management, Vegetation management, Species conservation (butterflies, grasshoppers), Forestry, Wildlife ecology. The company supports the sustainable use of natural resources and the preservation of cultural landscapes.

Sustainability Sector
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Arkey SA Logo

Arkey SA 

Lausanne · Since 2023

The core activity of Arkey is to advise and support property owners in the energetic renovation and optimization of their buildings. This includes conducting energy audits, creating energy certificates (CECB), planning and coordinating renovation measures, as well as advising on the selection of subsidies and financing options. The goal is to increase the energy efficiency and value of the properties while reducing environmental impact.

Sustainability Sector
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ARNAL, Büro für Natur und Landschaft AG Logo

ARNAL, Büro für Natur und Landschaft AG 

Herisau · Since 1997

The core activity of ARNAL is consulting and implementing projects in the field of nature and landscape conservation, including: environmental and ecological assessments, conservation genetics, public relations and environmental education, construction supervision and project management in the field of environment and ecology, research and development in the field of nature and landscape conservation. The company also offers services such as accreditation, specialized information and method development.

Sustainability Sector
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Arni Energie AG Logo

Arni Energie AG 

Arni Be · Since 2019

The core activity of Arni Energie AG is energy supply, particularly electricity supply, as well as energy consulting.

Energy Suppliers
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Arnold & Partner AG Logo

Arnold & Partner AG 

Horw · Since 2004

The core activity of Arnold & Partner AG lies in the development and implementation of solutions for renewable energy, particularly in the field of biogas and process technology. The company offers products and services for agriculture, such as evaporators, drying and pelleting plants, as well as solutions for wastewater treatment and disposal. In addition, the company also provides mixing technology for municipal wastewater treatment plants.

Technical Consulting & EngineeringSustainability SectorMechanical Engineering Industry
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Arnold Pfister AG Logo

Arnold Pfister AG 

Schönenberg Zh · Since 2014

The core activity of Arnold Pfister AG is the cleaning, inspection, tightness testing and disposal of sewage pipes and systems. This includes in particular: The cleaning of sewage pipes with high-pressure flushing vehicles and suction vehicles; The inspection of sewage pipes with sewer television systems; The testing of sewage pipes for tightness and leaks; The disposal of special waste, such as sludge collectors and oil separators; Winter maintenance services. The company thus offers a comprehensive range of services for the maintenance and renovation of sewage pipes and systems.

Waste Management Industry
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Arnon Energie SA Logo

Arnon Energie SA 

Vuiteboeuf · Since 2019

Arnon Energie SA is a company that develops and operates a small hydroelectric power plant. The installation includes an intake, an approximately 1.3 km penstock and a Pelton turbine and is intended to produce around 2,000,000 kWh per year of renewable electricity for local consumption.

Energy Suppliers
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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.