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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesGlazieryWiedlisbachDuma Glas AG
Duma Glas AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Duma Glas AG is the manufacture and sale of individual glass works for interior and exterior spaces, including glass processing, sales and repair, as well as the planning and execution of glass projects for bathrooms, living and working spaces, kitchens and outdoor areas.

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Products & services

Industry:Glaziery
✓ Offered6
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Duma Glas AG

Custom glazing
Individually planned and custom-fitted glazing for indoor and outdoor areas, from glass doors and partition walls to shower enclosures, kitchen splashbacks, balustrades and canopies.
Interior glazing
Glazing for bathrooms, living and work areas as well as kitchens, including showers, mirrors, doors, partition walls, balustrades, kitchen splashbacks and worktop coverings.
Exterior glazing
Glazing for entrance areas, balconies and terraces, in particular glass balustrades and canopies, as well as other tailored outdoor solutions.
Glass service
Advisory on design with glass, repairs for glass and mirror damage, glass check, and cut-to-size glass with or without installation.
Cut-to-size glass
Cut-to-size glass for glass shelves, window glazing, mirrors and other glass products, on request with or without installation.
Glass shower enclosures and partitions
Custom-made shower enclosures, shower walls and shower doors for bathroom conversions and new builds, matched to the room conditions and individual preferences.
Trust & reputation

ranQ Trust Score of Duma Glas AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Duma Glas 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%
Duma Glas AG scores 89.3 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.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.70.07%
Duma Glas AG scores 83.3 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).83.322%
Duma Glas AG 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

Duma Glas 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 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

Holzgasse 13a
4537 Wiedlisbach

At a glance

Legal form
Corporation
UID
CHE-105.433.105
Founded
2000 · 26 years
Last commercial register change
April 21, 2026
Employees
11 to 20
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.
100.0
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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