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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryPublic Administration & EducationSchoolsZurichSIS Swiss International Schools Schweiz AG
SIS Swiss International Schools Schweiz AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

SIS Swiss International Schools Schweiz AG operates a network of private full-day schools providing continuous bilingual instruction in German and English from kindergarten through secondary education. Programmes include a bilingual Maturität pathway and the International Baccalaureate Diploma Programme (IBDP).

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SIS Swiss International Schools Schweiz AG

Bilingual Full-Time School
Bilingual instruction in German and English from kindergarten to university entrance level, with block schedules, lunch service, supervised homework sessions and additional supervision times.
Kindergarten
Bilingual kindergarten for children from three or four to six years old, with immersive learning, playful learning opportunities and a full-day school concept.
Primary School
Bilingual primary school with instruction in German and English, based on the cantonal curriculum, with elements of the British curriculum and SIS-developed curricula.
Secondary School
Bilingual secondary school with immersive instruction, preparation for gymnasium or an international programme, and exam-free entry with qualifying performance.
Gymnasium
Bilingual gymnasium with preparation for the federally recognised bilingual Matura and/or the International Baccalaureate Diploma.
International Baccalaureate Diploma Programme (IBDP)
International Baccalaureate Diploma Programme in the gymnasium, with English-medium instruction in all subjects except German, and open to transfer students.
Day School Programmes
Lunch service, morning, afternoon and homework supervision, flexible pick-up and drop-off times, and activities and clubs even during school holidays.
SIS Student Exchange Programme
Exchange programme for students in the upper year groups, with a visit to another SIS school abroad to develop intercultural skills.
Trust & reputation

ranQ Trust Score of SIS Swiss International Schools Schweiz AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 58% · As of October 2026

Without public customer reviews the score stays capped.

SIS Swiss International Schools Schweiz AG 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%
SIS Swiss International Schools Schweiz AG scores 95.8 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.96.07%
SIS Swiss International Schools Schweiz AG 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%
SIS Swiss International Schools Schweiz AG scores 71.7 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 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.43.34%
Qualifications+0.00

SIS Swiss International Schools Schweiz AG 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 58%, 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.

Press

Media

March 17, 2023Media
Englisch-Deutsch: Zu Besuch an einer Privatschule in Schönenwerd
oltnertagblatt.ch
February 25, 2022Media
Privatschule in Winterthur – Die Swiss International School schliesst Standort
tagesanzeiger.ch
November 9, 2021Media
Tag der offenen Tür findet an der SIS Schönenwerd statt
nau.ch
July 7, 2020Media
100. Maturandin der SIS Zürich in Wallisellen wird gefeiert
nau.ch
May 23, 2020Media
Schönenwerds Privatschule ist zurück im Alltag
nau.ch
September 14, 2010Media
Swiss International School Ingolstadt ist etabliert
swissinfo.ch

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Location

Seestrasse 269
8038 Zurich

At a glance

Legal form
Corporation
UID
CHE-114.033.058
Founded
2008 · 18 years
Last commercial register change
December 1, 2025
Employees
101 to 500
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.70.03%
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