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Tretor AG provides fiduciary services, including accounting, payroll administration, auditing and tax consulting.
Tretor AG provides financial and fiduciary services to businesses and individuals, including accounting, payroll administration, auditing and tax consulting. Its clients include SMEs, healthcare professionals, nonprofits and startups in Northwestern Switzerland. Founded in 1995, the company is based in Liestal, Switzerland. In February 2026, it received investment from Pictet Alternative Advisors.
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