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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryArts, Culture & RecreationCultural organisationZurichStar Institut GmbH
Star Institut GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Star Institut GmbH provides tutoring, learning coaching and preparation courses for entrance examinations to Swiss schools, as well as a programme for International A Levels. Teaching is available online and in person, and self-study courses include instructional videos, exercises and solutions.

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Products & services

Industry:Cultural organisation
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Star Institut GmbH

✓ Offered7
Gymnasium preparation
Preparation for the long and short gymnasium programme with clear learning plans, understandable explanations, targeted practice, learning videos, and exam simulations.
BMS preparation
Preparation for the BM1 and BM2 entrance exams with a systematic approach, German and mathematics training, learning videos, checks, and exam simulations.
Tutoring
Structured support within the Swiss school system with individual guidance, learning plans, revision, and online or in-person sessions.
International A Levels
International education path with a focused choice of subjects, an IGCSE foundation, live classes, recordings, learning plans, and personal guidance toward university.
Online courses
Compact online courses for KZG, BMS, and IMS with recorded lessons, assignments, Q&A sessions, and flexible revision.
Teaching materials
Original PDF documents, dossiers, exercises, and lesson summaries, organised by level and topic.
Video library
Supplementary learning videos for LZG, KZG, BM1, and BM2 preparation, covering topics, exam content, and revision.
Trust & reputation

ranQ Trust Score of Star Institut GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Star Institut GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Star Institut GmbH scores 83.0 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.55.07%
Star Institut 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%
Star Institut GmbH scores 3.4 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 35.3.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Star Institut GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of November 2026.

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

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Location

Josefstrasse 92
8005 Zurich

At a glance

Legal form
Limited Liability Company
UID
CHE-110.472.453
Founded
2004 · 22 years
Last commercial register change
March 26, 2009
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • ZHZurich
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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