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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryPublic Administration & EducationContinuing Education InstitutesZugCastle's English Institute Ltd
Castle's English Institute Ltd Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Castle's English Institute Ltd offers language courses for private learners and companies and arranges language stays abroad. The institute operates small classes (max six participants), provides placement tests and exam preparation (e.g. Cambridge, DELF/DALF), and grants e‑learning access to enrolled students.

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Offering

Products & services

Industry:Continuing Education Institutes
✓ Offered5
Language courses
Language courses in English, German and French, as group classes at different levels and formats, including in-person, online and intensive courses.
English courses
English courses for different levels and target groups, including business courses, happy-hour courses, evening classes, online courses, private tuition and summer intensive courses.
Business English
Business English courses at B1 level with topics from the modern working environment, plus practice of phone calls, emails and presentations.
Online courses
Online language courses for English, parallel to the in-person courses at the Zug location.
Private tuition
Private tuition for language learners, with separate options by level such as B1/B2.
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4.1/5

Castle's English Institute Ltd

Trust & reputation

ranQ Trust Score of Castle's English Institute Ltd: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Castle's English Institute Ltd 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.
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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%
Castle's English Institute Ltd scores 87.1 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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%
Castle's English Institute Ltd scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Castle's English Institute Ltd scores 80.0 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 35.80.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Castle's English Institute Ltd 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 October 2026.

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

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Location

Baarerstrasse 63
6300 Zug
Opening hours
Mon
14:15 - 18:00
Tue
14:15 - 18:00
Wed
14:15 - 18:00
Thu
14:15 - 18:00
Fri
14:15 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.870.813
Founded
1980 · 46 years
Last commercial register change
October 16, 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.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.85.03%
    • Full methodology

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