What TRETOR does

TRETOR AG is a Swiss fiduciary, audit, tax, and business consulting firm founded in 1995 and headquartered in Liestal, Switzerland, with a second office in Basel. The firm delivers an integrated professional services portfolio spanning Treuhand (bookkeeping, payroll administration), Wirtschaftsprüfung (statutory and voluntary audits, expert opinions), Steuern und Abgaben (corporate, personal, and VAT tax advisory), and Unternehmensberatung (controlling, financing, company formations, HR, interim management, succession planning, valuations, board mandates, and cloud solutions). Its customer base is segmented horizontally across Swiss SMEs, medical practices, non-profit organizations, and startups, served through direct partner-led engagement out of two regional offices with over 50 employees.

The business model is classic professional services — engagement-based fees billed by scope and complexity across recurring compliance work (accounting, payroll, tax filings) and project-based advisory mandates, with no disclosed standard pricing. The firm leverages partner expertise with certified auditor and tax-expert credentials, partner-led client relationships, and an extensive thought-leadership publications library as differentiation. TRETOR is a member of the HLB international network for cross-border engagements. Underlying technology is conventional professional-services tooling supplemented by digital and cloud solutions; the firm itself does not disclose proprietary software or AI products, though its 2026 strategic partners (Vantikai AG) bring AI-supported automation capability.

In February 2026, Pictet Alternative Advisors' Direct Private Equity strategy invested in TRETOR to anchor a Swiss SME-focused accounting services platform; in June 2026, TRETOR joined the Trusso-Gruppe alongside Ferax Treuhand AG and Vantikai AG, forming a national Swiss fiduciary and audit group under which TRETOR continues to operate its regional offices and client base.

Name

TRETOR

Legal name

TRETOR AG

Website

https://tretor.ch

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

11–50 employees

Short description

TRETOR AG is a Swiss fiduciary, audit, tax, and business consulting firm founded in 1995, headquartered in Liestal with a Basel office, serving SMEs, medical practices, non-profits, and startups across Northwestern Switzerland through integrated professional services and partner-led engagements.

Ownership category

akta.pro rank

Product category

Fiduciary Services

NAICS

Administrative Management and General Management Consulting Services (541611), Other Scientific and Technical Consulting Services (54169)

SIC

Services-Management Consulting Services (8742)

akta.pro primary industry

Intercompany & Consolidation Support (Eliminations, Group Reporting Support) (BPAAAGAG)

akta.pro secondary industries

Divestitures, Spin-offs & Carve-outs Advisory (BPAHADAJ), Compliance Technology, GRC Platforms & Controls Automation Advisory (BPAHAFAO)

Keywords

• Fiduciary services
• Accounting services
• Tax consulting
• Business consulting
• Auditing services

Headquarters

HQ city

Liestal

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Professional Services (Treuhand): Core fiduciary services including accounting, payroll administration, and financial management for SMEs. Revenue generated through professional service fees for ongoing compliance and advisory engagements.
2. Audit Services: Statutory and voluntary auditing services for companies. Includes limited and ordinary audits as regulated under Swiss law.
3. Tax Consulting: Corporate and personal tax advisory services, VAT consulting, and international tax planning. Billed as part of advisory engagements.
4. Business Consulting: Management consulting including controlling, financing, company formations, succession planning, and interim CFO services. Project-based professional service fees.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

TRETOR AG is a Swiss fiduciary and accounting services company offering an integrated portfolio of professional services: Treuhand (accounting/bookkeeping and payroll administration), Wirtschaftsprüfung (statutory and voluntary auditing, expert opinions), Steuern und Abgaben (corporate, personal, and VAT tax advisory), and Unternehmensberatung (business consulting covering controlling, financing, company formations, HR management, interim management, succession planning, valuations, board mandates, and cloud solutions). Cross-border services are delivered through the HLB international network.

Product overview

TRETOR AG is a Swiss fiduciary and accounting services company offering an integrated portfolio of professional services. The core offerings consist of Treuhand (fiduciary/accounting services with bookkeeping and payroll), Wirtschaftsprüfung (auditing with statutory audits and expert opinions), Steuern und Abgaben (tax advisory for businesses, individuals, and VAT), and Unternehmensberatung (business consulting covering controlling, financing, company formations, HR management, interim management, succession, valuations, and cloud solutions). All services are delivered through interdisciplinary teams with additional support via an international network (HLB). The company serves SMEs, medical practices, non-profit organizations, and startups across Northwestern Switzerland.

Differentiator

Problem solved

Functional benefit

Products and services

• Treuhand (Fiduciary Services) Core fiduciary services including accounting/bookkeeping (Buchhaltungen) and payroll administration (Lohnadministration) for SMEs, medical practices, non-profits, and startups in Northwestern Switzerland.
• Wirtschaftsprüfung (Auditing) Auditing services including statutory audits (Revision) and expert opinions (Expertisen) for companies requiring ordinary or limited audits under Swiss law.
• Steuern und Abgaben (Tax Services) Tax advisory services for businesses, private individuals, and VAT (Mehrwertsteuer) compliance and planning across Switzerland.
• Unternehmensberatung (Business Consulting) Business consulting covering controlling, financing, company formations, HR management, interim management, succession planning, company valuations, board mandates, and cloud solutions for SMEs and startups.
• International Services Cross-border services including international audit services, tax services, and international payroll services, leveraging the HLB global network of auditing and tax consulting firms.

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered flagship and core.

• Trusso-GruppeflagshipStrategic or Co-development Partner · 2 June 2026TRETOR AG is now part of the Trusso-Gruppe, a national fiduciary and audit services group. Trusso positions itself as a strategic partner for SMEs, providing administrative relief and strategic consulting from accounting through tax advisory and auditing to business consulting including controlling, financing, digital transformation, succession, and valuation. The model combines locally anchored partner firms in a shared entrepreneurial framework.
• Ferax Treuhand AGcoreStrategic or Co-development Partner · 2 June 2026Partner firm in the Trusso consolidation strategy. Ferax is a partner-led Swiss fiduciary and audit company based in Zurich, serving SMEs, insurance companies, pension funds, foundations, and private individuals since 1989. Brings established local consulting expertise in Northwestern Switzerland and Zurich.
• Vantikai AGcoreStrategic or Co-development Partner · 2 June 2026Partner firm expanding the group's portfolio with AI-supported automation and digital transformation solutions for SMEs. Vantikai is a Swiss efficiency-as-a-service company headquartered in Basel, specializing in technology and business process outsourcing for SMEs.
• HLB InternationalcoreTechnology or IntegrationTRETOR AG is a member of HLB network, a worldwide association of independent auditing and tax consulting firms. As a Swiss partner, Tretor serves as a competent point of contact for international audit firms and provides international auditing services to clients with cross-border needs.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Grant Thornton Switzerland: International mid-tier accounting network with Swiss offices targeting growth-stage and mid-market companies; overlaps with TRETOR on SME audit, tax, and advisory mandates and pursues similar international network positioning.
• BDO Switzerland: Top-5 Swiss audit, tax, and advisory network with national footprint and a strong Basel office; competes directly for fiduciary, audit, and tax mandates on Swiss SMEs but operates at substantially greater scale and with a wider service portfolio than TRETOR.
• KPMG Switzerland: Big 4 firm with a prominent Basel office (notably TRETOR managing-partner Adrian Schaller began his career at KPMG Basel in 2006). Competes for upper-mid-market fiduciary and audit clients and increasingly for SME mandates in the Basel corridor.
• PwC Switzerland: Big 4 firm with a strong Basel office and broad Swiss mid-market practice; competes for audit, tax, and business consulting work on the same SME buyer profile targeted by TRETOR.
• Deloitte Switzerland: Big 4 firm with full national coverage and a Basel presence; competes for statutory audit, corporate tax, and business consulting mandates across the Swiss SME and mid-market segments that TRETOR serves.
• Mazars Switzerland: International mid-market audit and advisory firm with a Geneva/Zurich presence; competes for Swiss SME fiduciary and audit engagements with a similar partnership-led model and comparable international network affiliation.

Direct peers

• HLB Switzerland (other member firms): Other Swiss member firms in the HLB international network of independent auditing and tax consulting firms. TRETOR is a Swiss member; sister firms are direct peers for both client competition and HLB referral routing.
• Ferax Treuhand AG: Partner-led Swiss fiduciary and audit firm based in Zurich, founded 1989, serving SMEs, insurance companies, pension funds, foundations, and private individuals. Ferax is itself a co-founding member of the Trusso-Gruppe alongside TRETOR, making it both an explicit platform partner and the closest operational peer in scale and service mix.

Regional players

• Trewit AG: Switzerland-based regional fiduciary and audit firm serving SMEs in the Northwestern Switzerland / Basel region; comparable in service mix (accounting, audit, tax, consulting) and target customer profile, representing direct head-to-head competition in TRETOR's core catchment.

Emerging players

• Vantikai AG: Basel-based efficiency-as-a-service firm specializing in AI-supported automation and digital transformation for SMEs; co-founding partner of the Trusso-Gruppe with TRETOR, providing technology-enabled adjacent services that overlap with TRETOR's cloud solutions and business consulting offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TRETOR