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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesBollS1 solutions AG
S1 solutions AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of S1 Solutions is to provide services to companies, particularly in the areas of: * Company formation (GmbH, AG) * Accounting and taxes * Personnel administration * Business consulting and coaching (Back on Track) * Accounting courses for self-employed individuals. The company supports its customers with administrative tasks, enabling them to focus on their core business.

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Products & services

Industry:Fiduciary Offices
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4.0/5

S1 solutions AG

✓ Offered6
Accounting and Taxes
Accounting for sole proprietorships, start-ups, small businesses as well as medium-sized and larger companies; financial accounting, VAT (MWST) returns, payroll accounting, annual financial statements, tax returns and reporting.
Formation of a GmbH or AG
Assistance with company formation, from document preparation through the capital account and notarial certification to the entry in the commercial register; including advice on legal form, insurance and deadlines.
Tax Returns and Annual Accounts
Tax returns for companies as well as for self-employed persons and employees; on request including annual accounts, filed for legal entities or personal tax cases.
Personnel Administration
Personnel administration for employees: employment contracts, terminations, payslips, wage certificates, registrations and deregistrations with authorities as well as reports to social insurance and withholding tax.
Reconstruction of Accounting
Updating and reconstructing missing or neglected bookkeeping; review documents, close gaps, contact authorities and get the bookkeeping back in order.
Consultation
Advice on taxes, accounting, personnel matters and law; initial meeting to analyse the situation, clarify the next steps and recommend the appropriate solution.
Trust & reputation

ranQ Trust Score of S1 solutions AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

S1 solutions AG scores 73.6 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.76.724%
  • 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.68.910%
  • 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.70.08%
S1 solutions AG scores 64.1 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%
S1 solutions 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%
S1 solutions AG scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

S1 solutions AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.7 out of 5 stars from 14 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
4.7
of 5

Aggregated from 14 reviews across all connected sources

Sources
GGoogle4.714
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Oberfeldstrasse 52
3067 Boll
Opening hours
Mon
09:00 - 17:00
Tue
09:00 - 17:00
Wed
09:00 - 17:00
Thu
09:00 - 17:00
Fri
09:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-489.865.989
Founded
2023 · 3 years
Last commercial register change
January 20, 2025
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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