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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint744,173 companies indexed · Last updated: today
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3'493 companies found

GSK Leckortung GmbH Logo

GSK Leckortung GmbH 

Winterthur · Since 2022

The core activity of GSK Leckortung is the execution of roof analyses, leak detection and roofing work for all types of roofs, particularly for flat roofs of industrial facilities, exhibition and fair buildings, workshops, school buildings and other new or renovated buildings. This also includes roof maintenance and inspections, renovation work, roof cleaning, replacement of gutters, retrofitting of fall protection systems and the installation of roof windows.

Roofing
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GÜNTHARD. POLITUMSETZUNG GmbH Logo

GÜNTHARD. POLITUMSETZUNG GmbH 

Winterthur · Since 2009

The core activity of Günthard. Politumsetzung GmbH is the consulting and support of organizations and individuals in the areas of political communication, leadership and communication concept development. The company offers services such as strategy consulting, communication concept development, lobbying, campaigning, media work and leadership support. It targets administrations, public institutions, private companies and people in leadership positions who need support in communication and leadership.

Public Relations Consulting
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GUT-zusammenleben GmbH Logo

GUT-zusammenleben GmbH 

Winterthur · Since 2020

The core activity of Gut-zusammenleben GmbH is to advise and support individuals and organizations in developing conflict management, communication, personality development, and teamwork, with the goal of promoting well-being and cooperation in private, social, and professional contexts.

Coaching & Personal Development
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H2A raum für ideen ag Logo

H2A raum für ideen ag 

Winterthur · Since 2020

The core activity of H2A is the planning, design and realization of future-proof work environments and interior spaces for companies. This includes services such as needs analysis, space planning, interior construction, furnishing, lighting and acoustic planning, as well as project management. The company supports customers in creating modern, flexible and motivating work environments that meet the needs of employees and the company culture.

Interior Construction
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Hahnloser/Jaeggli Stiftung Logo

Hahnloser/Jaeggli Stiftung 

Winterthur · Since 1980

The company's core activity is the preservation, presentation and promotion of art and culture, particularly through the management and exhibition of the Hedy and Arthur Hahnloser collection, as well as supporting the Kunst Museum Winterthur and the museum association.

Museums
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haltiner & ARCHITEKTUR AG Logo

haltiner & ARCHITEKTUR AG 

Winterthur · Since 2001

haltiner & ARCHITEKTUR AG is an architectural practice offering design, planning and consulting services for new-builds, renovations and conversions. Services include work on residential and commercial projects, competition entries and advice on handling existing building fabric and spatial organisation.

Architecture Firms
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HammerDrum AG Logo

HammerDrum AG 

Winterthur · Since 2022

Research & DevelopmentCivil Engineering Firms
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HAND IN HAND: STIFTUNG FÜR EINE NACHHALTIGE ENTWICKLUNG Logo

HAND IN HAND: STIFTUNG FÜR EINE NACHHALTIGE ENTWICKLUNG 

Winterthur · Since 2005

HAND IN HAND: STIFTUNG FÜR EINE NACHHALTIGE ENTWICKLUNG supports projects for sustainable development with a focus on environmental measures, microfinance and education and training. The foundation implements projects in Haiti including water access, soil irrigation and desalination, reforestation, village savings and loan systems, literacy and scholarship programs.

Sustainability Sector
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Handschin & Handschin GmbH Logo

Handschin & Handschin GmbH 

Winterthur · Since 2021

The core activity of Handschin & Handschin GmbH is the development, publication and distribution of educational materials for the 2nd cycle of primary school, particularly thematic editions and design books for children.

Publishing
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HannesFRiTZ GmbH Logo

HannesFRiTZ GmbH 

Winterthur · Since 2001

Trade Fair & Event Organizers
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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.