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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesDietikonBlacksea Group GmbH
Blacksea Group GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Blacksea Group GmbH provides insurance advisory and brokerage services as well as fiduciary and accounting services. Insurance offerings include motor, health, travel, liability, household, life and corporate insurance, while fiduciary services cover bookkeeping, payroll, VAT returns and tax declarations.

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Offering

Products & services

Industry:Fiduciary Offices
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4.3/5

Blacksea Group GmbH

✓ Offered
5
Trust & bookkeeping
Company formation, setting up and managing bookkeeping, financial accounting, payroll accounting, accounts receivable and accounts payable, VAT reporting, balance sheet and income statement, personnel administration, payroll slips.
Tax return
Professional completion of the tax return, fast and discreet processing, support across all cantons in Switzerland, assistance without an appointment and without long waiting times.
Insurance advice & comparison
Advice and free insurance comparison for car insurance, health insurance, travel insurance, private liability, household contents insurance, business insurance and legal expenses insurance.
Car insurance
Car insurance with basic coverages for third-party liability, partial casco and full casco, as well as additional coverages such as parking damage, gross negligence, bonus protection and further extra benefits.
Health insurance advice
Free and professional advice to compare health insurance premiums, support with switching and handling the paperwork.
Trust & reputation

ranQ Trust Score of Blacksea Group GmbH: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Blacksea Group GmbH scores 97.5 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.97.324%
  • 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.100.010%
  • 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.95.08%
Blacksea Group GmbH scores 61.5 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.50.012%
  • 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%
Blacksea Group GmbH 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%
Blacksea Group GmbH scores 1.4 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 35.1.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Blacksea Group GmbH 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 122 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 122 reviews across all connected sources

Sources
GGoogle5122
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Hasenbergstrasse 2
8953 Dietikon
Opening hours
Mon
09:00 - 12:00, 13:00 - 17:00
Tue
09:00 - 12:00, 13:00 - 17:00
Wed
09:00 - 12:00, 13:00 - 17:00
Thu
09:00 - 12:00, 13:00 - 17:00
Fri
09:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-240.929.819
Founded
2023 · 3 years
Last commercial register change
December 5, 2023
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.
88.0
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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