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itesys group AG 

Frauenfeld · Since 2020

itesys group AG provides services in SAP technology, SAP security and platform engineering, offering consulting, professional services and SAP operations/outsourcing for SAP systems. Its offerings include S/4HANA transformation, SAP authorization management, hosting in private and public cloud, application lifecycle management and system decommissioning solutions (e.g. Nearline Analytic Archive via a partner).

Lütolf Service GmbH 

Frauenfeld · Since 2019

The core activity of Lütolf Service GmbH is the repair and installation of household appliances from all premium brands, including V-Zug, Liebherr, Siemens, Bosch, Gaggenau, Miele, Schulthess and Electrolux. The company also offers the creation of replacement and new offers, as well as the sale of spare parts.

Marina Kretz Photography 

Frauenfeld · Since 2023

The company's core activity is the provision of photography services, particularly in the areas of business, architecture, events, portraits, weddings, products, erotic/nude and family photography.

Müller Garten und Immobilien AG 

Frauenfeld · Since 1987

The core activity of Müller Gartenbau AG is gardening and maintenance, including new garden installations, renovations, garden maintenance, garden care, shrub pruning, lawn care and pest control.

SERTO Group AG 

Frauenfeld · Since 2024

SERTO Group AG is a manufacturer of tube union technology and connection systems. The company designs, produces and sells unions, couplings, valves, tubes/hoses and related accessories, and provides project engineering, custom assemblies and logistics services.

SERTO AG 

Frauenfeld · Since 2001

SERTO AG is a manufacturer of tube unions and connection technology, supplying unions, couplings, valves, tubes, hoses and related spare parts for the transport, distribution and regulation of liquids and gases. The company also provides project engineering, production of customised assemblies (including an ISO Class 8 clean room) and logistics services such as just-in-time kits and consignment stock.

SERTO HOLDING AG 

Frauenfeld · Since 2006

SERTO HOLDING AG is a manufacturer of tube union technology supplying unions, couplings, valves, tubes/hoses and related components, and providing project engineering and production services. The company produces customised assemblies, offers logistics and production services including clean-room capabilities, and serves sectors such as high-tech, healthcare, energy, transportation and industry.

Siedler Alarm GmbH 

Frauenfeld · Since 2006

The core activity of Siedler Alarm GmbH is the planning, installation, maintenance and support of security systems, including alarm systems, video surveillance and access control, as well as the implementation of security analyses and the provision of remote support and patrol services.

SWOBAG Architektur GmbH 

Frauenfeld · Since 2023

SWOBAG Architektur GmbH provides construction and project-development services, delivering turnkey residential and commercial new builds as well as renovations, and offering planning, project and construction management, land acquisition and buyer support.

SWOBAG Group AG 

Frauenfeld · Since 2015

SWOBAG Group AG provides construction and real-estate services including project development, planning, project and site management, and the execution of new-builds, renovations and commercial projects. Services include turnkey delivery, land acquisition, tendering/procurement, buyer support and post‑handover follow‑up.

SWOBAG Realisation AG 

Frauenfeld · Since 2023

SWOBAG Realisation AG is a company for project development and the realization of construction projects. It provides services including land acquisition, planning, project and construction management, tendering and buyer support, as well as turnkey delivery.

Traditional Barbershop Durmazkeser, Zweigniederlassung ME Capelli 

Frauenfeld · Since 2024

Traditional Barbershop Durmazkeser, Zweigniederlassung ME Capelli offers hairdressing services including haircuts, colouring, balayage, perms, extensions and hair treatments for women, men and children. The branch also provides updos, make-up and eyebrow and eyelash services.

Vorsorge SERTO 

Frauenfeld · Since 2008

Zahnarztpraxis Vorstadt AG 

Frauenfeld · Since 2020

The company's core activity is the provision of dental services, including prophylaxis, teeth cleaning, amalgam-free treatment, tooth-colored fillings, implants, root canal treatments, prosthetics, pediatric dentistry and other dental treatments.

HERZwärts AG 

Frauenfeld · Since 2021

Ellenbroek Hugentobler AG 

Frauenfeld · Since 1975

Ellenbroek Hugentobler AG is an electrical engineering company offering services such as electrical installations, network construction, telematics, building services, photovoltaics, e‑mobility and service/maintenance. The company also provides planning, consulting and control/security solutions and is part of the Baumann Koelliker Gruppe.

GENOSSENSCHAFT JUGENDMUSIKSCHULE FRAUENFELD 

Frauenfeld · Since 1998

GENOSSENSCHAFT JUGENDMUSIKSCHULE FRAUENFELD provides professional music, singing and dance instruction for children, young people and adults, offering instrumental lessons, basic music courses, choirs, ensembles and bands.

H. Wellauer AG 

Frauenfeld · Since 1954

Oswald Haller AG 

Frauenfeld · Since 1967

Oswald Haller AG provides building-envelope services including consultation, planning and execution of roofing, façades and sheet-metal work. Offerings also include photovoltaic systems and battery storage, VELUX roof-window installation, energy-related renovations, maintenance and support with energy advice and funding applications.

SC Haller AG 

Frauenfeld · Since 2001

SC Haller AG is a building-envelope specialist providing consulting, planning and execution services for roofs, façades and metalwork. Its services include photovoltaic systems with battery storage, VELUX roof windows, energy-related renovations, ongoing maintenance and energy advice with support for subsidy applications.