Energy & Environment

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9'016 companies found

Gte SA

Stabio · Since 2013

Gte SA provides design, installation and maintenance of electrical, thermotechnical, hydraulic and mechanical systems for residential, commercial and industrial projects. Services include NIBT-compliant electrical installations, RVCS and HVAC systems, photovoltaic and solar-thermal systems integrated with heat pumps and EV chargers, structured cabling, safety inspections and turnkey project delivery, and the company holds Swiss certifications such as the ESTI installation authorization I‑06426.

Electrical Planning & InstallationSolar & Photovoltaics

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Hans Giezendanner GmbH

Lütisburg Station · Since 2022

The core activity of Hans Giezendanner GmbH is the installation, maintenance and repair of heating and plumbing systems, including solar systems and building technology. The company also provides impulse consulting and services in the areas of modernization, new construction and repairs.

Solar & Photovoltaics

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HAP Haustechnik GmbH

Ostermundigen · Since 2021

The core activity of HAP Haustechnik GmbH is the planning, installation and maintenance of building technology systems, particularly in the areas of heating, water and solar installations, as well as consulting and planning in the field of renewable energies.

Plumbing & Building ServicesSolar & Photovoltaics

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Hasensprung Solar GmbH

Thusis · Since 2022

The core activity of Hasensprung Solar GmbH is the development, planning, implementation and operation of large-scale photovoltaic systems in Switzerland. This includes feasibility studies, 3D scans, visualizations, solar calculations, design, installation, grid connection, operation, monitoring and maintenance of solar systems. The company also offers services such as leasing models for building owners, where solar systems are installed and operated on rooftops to produce sustainable energy.

Solar & Photovoltaics

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Haustechnik Blättler AG

Giswil · Since 2014

The core activity of Haustechnik Blättler AG is the planning, installation and maintenance of building technology systems, particularly in the areas of sanitary, heating and solar technology. This also includes service work such as repairs and replacement of components.

Solar & Photovoltaics

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HEIM AG Solarsysteme

Aadorf · Since 2009

HEIM AG Solarsysteme designs, installs and maintains photovoltaic systems and related components such as inverters, battery storage, e‑charging stations and grid separation. The company delivers customised solutions for residential, commercial and industrial projects, including system planning, permitting and ongoing maintenance and support.

Solar & Photovoltaics

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Hertli & Bertschy AG, elektrische Anlagen

Tafers · Since 1971

The core activity of hertli + bertschy ag is the provision of services and specialized services in all areas of the electrical industry, particularly in the fields of electrical installations, building automation, solar systems and electromobility.

Solar & Photovoltaics

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HORIZONTE-Group AG

Lucerne · Since 2019

The company's core activity is consulting and services in the field of energy and climate management, particularly for energy supply companies, municipalities, and the real estate industry. The activities include, among others: Contracting and district heating planning, decentralized energy generation and CHP checks, CO₂ strategy consulting and energy audits, e-mobility concepts and charging management, energy management and ISO 50001 certification, churn management and customer loyalty, sub-metering and metering point operation, and transformation planning and consulting for energy supply companies. The company also offers workshops and moderation to support customers in implementing their energy and climate goals.

Management ConsultingSustainability Sector

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Hytecon AG

Lucerne · Since 2015

The core activity of HYTECON is the development and distribution of products that improve and protect water quality, particularly in the area of removing pollutants such as plastics, hormones and PFAS. The company offers individual solutions to both private and commercial customers and has a team of researchers and developers focused on developing innovative products.

Sustainability Sector

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I.C. Morandi Sagl

Roveredo Gr · Since 2011

The core activity of Morandi Trasporti Sagl is the provision of transport and logistics services, particularly in the field of goods transportation and waste management. The company offers services such as the disposal of vegetation material, the clearance of cellars and attics, as well as the transportation of goods.

Waste Management Industry

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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.

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.