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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesZurichSIDENIA AG
SIDENIA AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

SIDENIA AG provides family trust and fiduciary services, including trustee, protector and board of director services, and the administration of trusts, companies and foundations. The firm advises on succession planning, structuring, governance and compliance and coordinates specialist partners for international families.

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Products & services

Industry:Fiduciary Offices
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3.8/5

SIDENIA AG

4
Trustee, Protector and Board of Directors mandates
Trustee, Protector and Board of Directors mandates for complex trust structures and companies; support with family matters, asset preservation and compliance with international regulatory and legal requirements.
Administration of trusts, companies and foundations
Administration of trusts, companies and foundations; establishment and incorporation in various jurisdictions, coordination of family assets, compliance, governance as well as restructurings and succession planning.
Family advisory
Family advisory for succession planning and wealth structuring; development of tailored solutions, support throughout the entire process, organisation of board meetings and advisory services.
Analysis and structural organisation
Analysis and structural organisation considering tax, accounting as well as regulatory and legal aspects; trust and company health checks and support in building an efficient organisation.
Trust & reputation

ranQ Trust Score of SIDENIA AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

SIDENIA AG scores 56.6 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.70.824%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.27.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.50.08%
SIDENIA AG scores 74.8 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.75.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
SIDENIA AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
SIDENIA AG scores 5.4 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.5.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

SIDENIA AG reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Dufourstrasse 42
8008 Zurich

At a glance

Legal form
Corporation
UID
CHE-239.543.695
Founded
2019 · 7 years
Last commercial register change
July 27, 2026
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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