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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTesting and inspection bodyPfäffikon SzGWK GmbH
GWK GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of GWK GmbH is the inspection and testing of gas and water installations, including liquefied gas controls and drinking water hygiene. Specifically, this includes: gas and water installation inspection, liquefied gas control (particularly for caravans, ships and catering establishments), drinking water hygiene, and inspection of house installations on behalf of gas and water suppliers. The company thus provides services in the field of safety and environmental monitoring of gas and water systems.

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4.1/5

GWK GmbH

Industry:
Testing and inspection body
Plumber
✓ Offered3
Gas and water installation inspection
Inspection of gas and water installations in new builds and renovations, including final checks, periodic inspections, pressure tests, meter replacement and official acceptance.
Liquefied gas inspection
Mandatory inspections of liquefied gas systems for caravans, boats and catering operations.
Drinking water hygiene
Consulting and support for safe drinking water installations, quality assurance in new builds and refurbishments, backflow safety, risk-based self-monitoring and support with contamination issues.
Trust & reputation

ranQ Trust Score of GWK 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.

GWK 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%
GWK GmbH scores 74.1 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.79.212%
  • 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%
GWK 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%
GWK GmbH scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

GWK 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

Churerstrasse 47
8808 Pfäffikon Sz

At a glance

Legal form
Limited Liability Company
UID
CHE-191.860.652
Founded
2018 · 8 years
Last commercial register change
November 22, 2018
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SZFreienbach
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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