Administrative Services in
Winterthur

Startups.ch AG

Since 2001 · 51–100 empl.·4.8(469)

STARTUPS.CH AG provides services for company formation and administration, including advisory support, commercial register filings, and fiduciary and tax services. The company also offers trademark protection, contract drafting, bookkeeping and payroll services, domiciliation and training programmes for founders.

HAWAdoc AG

Since 1998 · 21–50 empl.·5.0(1)

The core activity of hawadoc AG is to provide services and solutions for the Swiss healthcare system, particularly for physician networks, medical practices, and health insurers. This includes, among other things: The provision of the family doctor model and the promotion of cooperation between patients, physicians, and health insurers; The administration of physician networks, including member management, contract negotiation, data management, accounting, marketing, and communication; The provision of consulting services, such as trust services, debtor management, and business management consulting; The provision of tools and platforms for collaboration and communication between healthcare stakeholders; The organization of continuing education and quality circles for medical personnel; The management of patient data and the provision of invoice printing and mailing services.

TrustX Management AG

Since 2003 · 11–20 empl.

The core activity of TrustX Management AG is the development and operation of services for the healthcare sector, particularly for physicians in the outpatient sector. This includes the capture, processing and analysis of billing data, the electronic forwarding of invoices to insurers, and the provision of statistical evaluations and services for physician organizations and medical practices.

topserve.ch GmbH

Since 2006 · 11–20 empl.

The core activity of topserve.ch is the provision of trust services, particularly in the areas of financial and payroll accounting, statistical services, management of secretariats and business offices, consulting and coaching, as well as product and market statistics. The company supports its customers in these areas and offers high-quality work at fair prices.

Exactis AG

Since 2006 · 11–20 empl.

The core activity of Exactis AG is the provision of services for medium-sized and smaller pension funds, occupational pension schemes, collective and group institutions. This includes in particular: analysis, consulting, appraisal, recommendation and information in the field of occupational pension provision; administration and accounting of pension institutions; IFRS expertise (International Financial Reporting Standards); outsourcing of services to relieve customers of non-core tasks. The company positions itself as a specialized partner for the provision of services in the field of occupational pension provision and offers its customers personal and comprehensive support.

SalaryPro AG

Since 2016 · 11–20 empl.

The core activity of SalaryPro AG is payroll processing and HR management for companies and personnel service providers. This includes, among other things, the recording and processing of payroll changes, the creation of payroll statements, the reporting and transmission of withholding taxes, the creation of payroll certificates, and the control and transmission of social insurance contributions. In addition, the company also offers on-site support, training, and consulting services for HR-related issues.

Scherler Siegenthaler Schweizer Rechtsanwälte AG

Since 2009 · 1–10 empl.

The core activity of Scherler Siegenthaler Schweizer Rechtsanwälte AG is the provision of legal services with a focus on construction and environmental law, transportation law, public construction law, procurement law and contract law. The company offers consulting and litigation services in these areas and has a team of specialized attorneys with specific expertise.

MHM - Grundbuch- und Notariatspraxis GmbH

Since 2021 · 1–10 empl.

The company's core activity is the provision of notary services, including certifications, document creation, consulting in matrimonial property law, inheritance law and advance directives, as well as the management of land registers and bankruptcy proceedings.

MSM Marve GmbH

Since 2010 · 1–10 empl.·5.0(2)

MSM Marve GmbH provides fiduciary services, accounting and tax advice and supports companies in financing, development and change processes. Its offerings also include HR and insurance administration, legal advice delivered by an independent law firm, SME financing and office services such as domiciliation, telephone reception and meeting facilities.

CALwin GmbH

Since 2021 · 1–10 empl.

The core activity of CALwin GmbH encompasses various services in the field of administration and finance, specifically: administration, accounting, payroll accounting, and bereavement support. Additionally, the company also offers theater direction, which is not directly related to the other services. However, the main focus of the company lies in administrative and financial services.

workplaceX ag

Since 2025 · 1–10 empl.

workplaceX ag places temporary and permanent staff for companies and job seekers in Switzerland. Its focus includes recruitment for roles in production, industry, logistics, office, customer service, sales, construction, trades, and IT-related functions.

Gantenstein Services AG, Vaduz (LI), Zweigniederlassung Winterthur

Since 2026 · 1–10 empl.

Gantenstein Services AG, Vaduz (LI), Zweigniederlassung Winterthur provides fiduciary and financial services. The website mentions advisory work on corporate structures, executive functions, bookkeeping, annual financial statements, tax returns, portfolio analysis, and legal support through partners.