The Swiss business advisory services market is undergoing significant change: technology is replacing routine tasks, regulations are becoming increasingly complex, and a generational shift is creating opportunities for acquisition. The result is a fragmented market with a clear need for consolidation. Against this backdrop, Trusso is positioned as a business services group that relieves SMEs of administrative burdens and acts as a strategic partner, offering support ranging from accounting and tax advisory to auditing services and business consulting in the areas of controlling, financing, digital transformation, succession planning and valuation.

The business model brings together locally established partner firms under a shared entrepreneurial framework. The group combines strong local client relationships with centralized expertise, leadership capabilities and modern technology. Partner firms retain their operational independence as local entrepreneurs while benefiting from economies of scale and continuous innovation.

As part of its planned expansion, Trusso has formed partnerships with Tretor, Ferax and Vantikai. Tretor and Ferax provide well-established local advisory expertise in north-western Switzerland and Zurich, and Vantikai strengthens the group's offering through AI-driven automation and digital transformation solutions for SMEs.

Strengthening the Leadership Team

Thomas Koller has been appointed Chairman of the Board of Directors of Trusso AG. He has extensive experience in building and leading partner-driven, multi-location service organizations and believes in the group's potential:

"With the establishment of Trusso, our partner firms gain access to professional structures, advanced technology and shared expertise, all the while preserving what matters most: strong local client relationships and entrepreneurial freedom."

Christoph Thommen will take on the role of Chief Technology Officer, leading the group's technology and AI strategy with a focus on scalable systems, automation and data-driven client solutions. The managing partners are Adrian Schaller, Josia Röhm, and Christoph Thommen. The partner team is further strengthened by Martin Dettwiler, David Klein, Antonio Marin, Renzo Peduzzi and Emil Walt, all of whom are Swiss federally certified auditors or tax experts.

Adrian Schaller summarizes:

"Many advisory service providers remain heavily dependent on manual processes. At Trusso, digitalization is not an add-on – it is the foundation. It frees up our teams, accelerates processes, and creates capacity for what truly generates value: personalized advice and strategic thinking."

Sectors Requiring Deep Advisory Expertise

Trusso focuses on sectors that demand a high level of advisory expertise, including construction and skilled trades, professional services, insurance, hospitality and tourism, healthcare, retail and e-commerce, real estate and development, industry and manufacturing, the public sector, and technology and start-ups.

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About Trusso

Trusso Group is a fiduciary and business advisory and audit services firm headquartered in Basel, Switzerland. At the heart of its approach are collaborative partnerships, entrepreneurial thinking and a clear focus on the individual needs and objectives of its clients.

Combining personalized advisory services with the strength of a nationwide network, Trusso Group operates through multiple hubs across Switzerland. The firm supports ambitious businesses with practical, technology-enabled solutions and a commitment to long-term, trusted partnerships.

Through interdisciplinary teams, Trusso Group primarily serves small and medium-sized enterprises (SMEs) across a broad range of industries, including healthcare, technology, retail, real estate and financial services. Its service offering encompasses accounting, payroll administration, audit and assurance, tax advisory, business consulting, as well as digital and international services.

About Tretor

TRETOR AG is a leading accounting services company based in Liestal, with a branch office in Basel, and is one of the long-standing service providers for accounting services, auditing, as well as corporate and tax consulting in Northwestern Switzerland.

With over 50 employees, TRETOR AG looks back on a successful history. The company was founded more than 30 years ago. Since then, the pursuit of entrepreneurial opportunities has shaped the company’s thinking and actions - always under the premise of a long-term corporate philosophy.

With its interdisciplinary teams, TRETOR AG primarily serves small and medium-sized enterprises (SMEs) across all sectors, start-ups, medical institutions, and public organizations. The focus is on individual, practical solutions and on building long-term, partnership-based relationships with its clients.

The range of services includes, among others, accounting, auditing, tax consulting, company formations, restructurings, interim management in the financial sector, and succession planning. As part of an international network of consulting and auditing firms, TRETOR AG combines local market knowledge with international expertise and also supports clients with cross-border issues.

About Ferax

‍Ferax Treuhand AG is a partner-led Swiss audit and accounting firm based in Zurich. Since 1989, we have been advising SMEs, insurance companies, pension institutions, foundations and associations as well as private clients – personally, comprehensively and often for decades. The partners lead Ferax together with a team of about twenty professionals. Our work is shaped by short paths, clear responsibility, and long-term relationships.

We accompany our clients in every economic question of their life and their business – from formation to succession, from retirement planning to settling an estate. Accounting, tax and legal advice, and corporate consulting are closely intertwined. We seek solutions that are not only compliant, but furthermore sustainable and sound – professionally grounded, entrepreneurially considered, and personally guided. We see ourselves as both a service provider and a sparring partner to our clients – attentive, clear in our stance, acting with integrity and committed to high professional standards. Through our international partner firms of BKR International, we also support clients on cross-border matters.

Our audit practice holds a distinct position. Ferax is accredited by the Federal Audit Oversight Authority (FAOA) as a state-supervised audit firm – the highest possible accreditation under the Swiss Audit Supervision Act, subject to regular quality reviews of our work. In addition, Ferax holds the accreditation as an audit firm for the insurance sector (ISA/VAG).

As a member of EXPERTsuisse, we are actively represented on several technical commissions, keeping us close to the leading edge of our profession.

What defines Ferax is the people behind it – a team of experts that continuously develops its knowledge and, beyond that, genuinely lives the commitment to be there personally for its clients.

About Vantikai

‍Vantikai AG is a Swiss Efficiency-as-a-Service company headquartered in Basel, specialising in technology and business process outsourcing for small and medium-sized enterprises.

The company was founded on the belief that the solutions and operational capabilities available to large corporations should also be accessible to ambitious SMEs, at a cost and complexity level that makes commercial sense. The founders, who bring over 20 years of experience in the software and outsourcing industries and have founded and scaled multiple companies in this space, have designed Vantikai around what actually works for growing businesses.

Vantikai serves clients across Switzerland, delivering tailored software solutions as well as outsourced services in Finance, Legal, Administration, and IT. Work is carried out by small, dedicated teams, called Pods, that integrate fully into the client's day-to-day operations, powered by the Vantikai Context Engine, a platform that continuously provides the team with the client's full business context, enriched with best-practice and regulatory knowledge, ensuring the Pod operates with the same understanding as the in-house team, and often with more.

With its headquarters in Basel and a delivery centre in Skopje, North Macedonia, the teams operate in the same timezone as their Swiss clients, combining local accountability with the cost efficiency that modern SMEs require.