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joe.systems AG 

Winterthur · Since 2014

The core activity of joe.systems AG is the development and provision of a software solution for the automated determination and optimization of the country of origin of products in international trade. The solution uses artificial intelligence to optimize the capture of supplier data and improve compliance with origin rules. The company offers an API and a web application that help companies quickly and efficiently determine the country of origin of products, thereby increasing profitability.

Johann Jakob Sulzer Stiftung 

Winterthur · Since 1947

Johann Jakob Sulzer Stiftung provides supplementary occupational pension coverage for executive employees, insuring the portion of salary that exceeds the SVE base scheme up to the legally defined maximum.

Jomi Boost GmbH 

Winterthur · Since 2025

Jonathan Chaclan Architekten GmbH 

Winterthur · Since 2020

Jonathan Chaclan Architekten GmbH is an architectural practice providing architecture, interior design, gastronomy planning and design services. Its offerings include concept development, kitchen and restaurant planning, project design and design-oriented site supervision for hospitality, residential and commercial projects.

Jucker Pollution Check 

Winterthur · Since 2001

The core activity of Jucker Pollution Check (JPC) is the implementation of operational checks, particularly in the field of environmental protection. The checks include the inspection of wastewater, waste disposal, and storage of water-polluting liquids at companies in the automotive industry, transport industry, gas stations, car repair shops, body and paint shops, transport companies, agricultural machinery and construction machinery operations.

Jürg Müller Maler AG 

Winterthur · Since 2005

The core activity of Jürg Müller Maler AG is the execution of painting, varnishing and wallpapering work, including facade and plastering work, wood protection, gilding, illusion painting and other related services in the field of construction and renovation work.

OCS Consulting AG 

Winterthur · Since 2019

OCS Consulting AG is an IT services and consultancy firm offering consulting, bespoke software development, managed application and support services, legacy system support and flexible resourcing. Services include project management, business analysis, testing and business intelligence, and the company works with technologies such as Java, Microsoft/.NET, SAS, Oracle and PowerBuilder.

Kaleidos AG 

Winterthur · Since 1995

The core activity of Kaleidos is providing services in the field of communication and design consulting, particularly in the areas of: Design (Logo, Corporate Design, Webdesign, Printdesign, Signage, Trade Fair/Event Appearance, Guidance System, Illustration), Text (Formulation of Headlines, Advertising Texts, Media Releases, Newsletters, Editorial Texts, Public Speeches), Photography (Portrait, Documentation, Individual Image Style, Image, Symbol or Theme Subjects), and Profiling (Consulting and Accompaniment in the Development or Optimization of Companies, Organizations or Personal Careers). The company thus offers a comprehensive range of services to support customers in the development and implementation of their communication and design strategies.

Kälin Architektur AG 

Winterthur · Since 2003

The core activity of Kälin Architektur AG is the provision of architectural services, including personal consulting and support for customers in the planning and implementation of construction projects.

Kanalservice Holding AG 

Winterthur · Since 2017

The company's core activity is the provision of services in the field of underground infrastructure, particularly in the areas of sewer and pipe cleaning, sewer inspection, sewer rehabilitation, suction works, as well as specialties such as surface cleaning and demarcation. The company offers these services as a full-service provider and focuses on the resource-efficient optimization of its customers' critical infrastructure.

KaNo Musik Verlag GmbH 

Winterthur · Since 1998

The core activity of KaNo Musik Verlag GmbH is the production, trade and distribution of sheet music of all kinds.

Kasten Triathlon Performance Coaching 

Winterthur · Since 2012

The company provides services in the field of health management and athletic performance enhancement. It supports customers in improving their fitness and health by developing individual training and nutrition programs based on metabolic profiles. Additionally, it offers coaching and lectures for companies to promote the health-related quality of life and athletic performance of employees.

Kasumi Facility Services GmbH 

Winterthur · Since 2018

The core activity of Kasumi is the provision of services in the field of building maintenance and cleaning, including: building management, building cleaning, moving and transportation, winter services, and window cleaning. The company offers these services to both private and business customers, emphasizing flexibility, solution-oriented approach, and environmental awareness.

Katingcon GmbH 

Winterthur · Since 2015

Katingcon GmbH provides consulting services focused on engineering and management consulting. The company offers expertise in fluid dynamics, refrigeration technology, ventilation systems and energy systems, and provides technical support such as technology consulting, product development and innovation workshops. It also advises on strategic corporate management including process analysis, quality assurance, and accepts mandates such as scientific advisory board or board of directors.

KDZ-Architektur GmbH 

Winterthur · Since 2024

Keel & Raster Planungs- und Baurecht GmbH 

Winterthur · Since 2021

Keel & Raster Planungs- und Baurecht GmbH provides legal advice and representation in public planning and construction law. Practice areas include planning law, construction and environmental law, nature and heritage protection law, land-value compensation law, procurement law and road law; services include legal counsel, representation in appeals, expert reports and support for legislative and permitting procedures.

Schoch 1882 Immobilien AG 

Winterthur · Since 1969

Keller Antiquitäten GmbH 

Winterthur · Since 2018

The core activity of Keller Antiques is the restoration, sale and expertise of antiques, particularly furniture such as chests, cabinets, commodes, tables, chairs and benches.

KELLER Pressure AG 

Winterthur · Since 1983

KELLER Pressure AG develops and manufactures pressure sensors, pressure transducers and pressure transmitters, as well as measurement devices such as level probes, data loggers and digital pressure gauges. The product range is based on piezoresistive pressure measurement technology and serves applications across sectors including water and environment, vehicles, HVAC, oil & gas, and chemical/pharmaceutical industries.

Keller Modellbau 

Winterthur · Since 1992

Keller Modellbau produces architectural and presentation models, including competition models, site models, sales/display models, interior models and façade models. The workshop also provides CNC milling services, processing DWG/DXF files and working with plastic and wood panels.