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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesZurichGrant Thornton AG
Grant Thornton AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Grant Thornton AG is an audit and advisory firm with a substantial tax practice and outsourcing services. Its core services include audit, tax, advisory and outsourcing, as well as regulatory and compliance support for financial services.

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Products & services

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4.3/5

Grant Thornton AG

✓ Offered12
Auditing
Audits for national and international business clients, including audit services for banks and other financial institutions.
Tax advisory
Individual tax advisory for businesses and individuals, including domestic and cross-border tax matters, tax due diligence and tax administration.
Advisory services
Advice on financial and business matters with tailored solutions, interdisciplinary teams and specialist areas such as IT, regulation, law, risk, transactions, IFRS and forensics.
Outsourcing
Outsourcing of administrative, organisational and accounting tasks, in particular finance and accounting, payroll accounting and Abacus-based services.
Corporate Tax
Tax advisory for companies, with support for domestic and international matters, cross-border transactions and tax clarifications.
Mergers & Acquisitions / Transaction Services
Advisory on transactions, company acquisitions and disposals, as well as transaction-related services as part of M&A processes.
Regulatory & Compliance Financial Services
Advisory on regulatory and compliance-related matters in the financial services sector, in particular supervisory requirements and anti-money-laundering prevention.
Trust Services
Trust-adjacent advisory and support services within the advisory division, for structuring and administrative mandates.
Business Risk Services
Services for assessing and managing business risks, integrated into advisory services for companies.
Forensic Services
Forensic services in the advisory field, including to clarify suspected cases and complex matters.
IFRS Services
Advisory on IFRS matters, accounting and their application in corporate reporting.
Payroll accounting
Outsourcing payroll accounting as part of the outsourcing offering to relieve administrative processes.
Trust & reputation

ranQ Trust Score of Grant Thornton AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Grant Thornton AG scores 63.9 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
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.88.08%
Grant Thornton AG scores 98.5 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.100.012%
  • 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.96.07%
Grant Thornton AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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%
Grant Thornton AG scores 100.0 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 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grant Thornton AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very 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

Claridenstrasse 35
8002 Zurich
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.841.337
Founded
1971 · 55 years
Last commercial register change
September 8, 2026
Employees
101 to 500
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.95.03%
    • Full methodology

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