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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryPublic Administration & EducationContinuing Education InstitutesWinterthurWintiSchule, Stefan Bigger
WintiSchule, Stefan Bigger Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of WintiSchule is the provision of educational and tutoring services for students of all school levels, including preparatory courses for transition to secondary school, high school and cantonal school, as well as specific courses such as German as a second language, German for au-pairs, music tutoring and holiday courses.

AI-generated
Offering

Products & services

Industry:Continuing Education Institutes
✓ Offered12
One-to-one tutoring and individual tuition
One-to-one tutoring and individual tuition in various school subjects for Primarschule, Sekundarschule, Handelsmittelschule, Fachmittelschule, Langgymnasium, Kurzgymnasium, Berufsschulen and Berufsmittelschulen.
Sek A preparation
Preparation for progression into Sek A with small-group instruction, revision of Primarschule content, closing gaps and exercises on work and study techniques.
Preparation for Mittelschule and Gymnasium
Small-group courses to prepare for Gymnasium, Mittelschule, Fachmittelschule, Handelsmittelschule and Berufsmittelschule, with subject revision, closing knowledge gaps and exam practice.
German as a second language / Swiss German
Courses to improve German and Swiss German skills at all levels, with a focus on oral communication, reading, writing and everyday language.
German for au pairs
German courses for au pairs and young adults at levels A2, B1 and B1+, focusing on oral communication, simple texts and everyday language.
Music tutoring
Tutoring for music lessons at Gymnasium and Sekundarschule with music theory, harmony, ear training and piano tuition.
Holiday courses
Holiday courses for Primarschule, Oberstufe and Mittelschulen for subject revision, deepening and building up knowledge, and preparation for the next school level.
Success check
Initial assessment and decision-making basis for transfers to Gymnasium or Fach-, Berufs- and Handelsmittelschulen, including an evaluation of knowledge level, aptitude and performance reserves.
Essay writing training
Intensive course for writing essays and texts, with rules for structure, text design, content, revision, and vocabulary and style.
Work and study techniques
Course to improve working methods and study techniques for students in Mittel- and Oberstufe, as well as all Mittelschulen.
Preparation for the probation period
Preparation for the probation period after starting at Kurzgymnasium, with support to successfully manage the first performance phase.
Preparation for aptitude test / Multicheck
Preparation for aptitude tests for apprenticeship seekers, school leavers and job applicants, with systematic exam preparation.
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3.7/5

WintiSchule, Stefan Bigger

Trust & reputation

ranQ Trust Score of WintiSchule, Stefan Bigger: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

WintiSchule, Stefan Bigger scores 53.6 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.53.924%
  • 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.55.910%
  • 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%
WintiSchule, Stefan Bigger scores 63.3 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.64.612%
  • 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%
WintiSchule, Stefan Bigger 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%
WintiSchule, Stefan Bigger scores 6.6 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 35.6.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

WintiSchule, Stefan Bigger reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 3.8 out of 5 stars from 8 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
3.8
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle3.88
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Neuwiesenstrasse 62
8400 Winterthur

At a glance

Legal form
Sole proprietorship
UID
CHE-313.815.533
Founded
2021 · 5 years
Last commercial register change
August 6, 2021
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.
67.0
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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