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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesGlazieryWinterthurKeller Glas AG
Keller Glas AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Keller Glas includes the manufacture, assembly and refinement of glass products, including laser engraving, as well as the sale and consulting of customers in this field. This also includes services such as glass repairs, glass installations and a glass delivery service.

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Offering

Products & services

Industry:Glaziery
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Keller Glas AG

✓ Offered9
Glass consultation and planning
Personal consultation, selection of products from the range and development of tailor-made glass solutions from planning through to implementation.
Glass production
Production of glass solutions with in-house production lines and a partner network, including fast delivery dates and various manufacturing sites.
Professional glass installations
On-site installation of shopfronts, all-glass systems and other glass elements, professionally, precisely and in compliance with safety regulations.
Glass delivery service
Transport of glass products in the Zurich region and, on request, throughout Switzerland.
Glass repairs
Repair of broken glass and damaged glass elements by repair specialists.
Laser engraving on glass
Custom laser engravings with patterns, designs, logos, lettering and privacy screening for glass surfaces, including beneath the surface.
Glass partition systems
Individually configurable glass partition walls with different types of glass, finishes, doors and sound insulation up to 42 dB.
Coatings and surface protection for glass
Coatings for mirrored, anti-reflective, reflective, dirt-repellent or self-cleaning finishes, as well as surface protection against water, oil and dirt.
Glass bonding
Tailor-fit bonding of glass with other materials for display cases, mirror cabinets, tables and other bespoke furniture pieces.
Trust & reputation

ranQ Trust Score of Keller Glas AG: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Keller Glas AG scores 85.5 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.78.624%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.100.010%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.88.08%
Keller Glas AG scores 92.3 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.82.07%
Keller Glas AG 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%
Keller Glas AG scores 57.1 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 35.57.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller Glas AG reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.6 out of 5 stars from 98 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 98 reviews across all connected sources

Sources
GGoogle4.698
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Knowledge

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Location

Kiesweiherstrasse 7
8404 Winterthur
Opening hours
Mon
07:00 - 12:00, 13:15 - 17:00
Tue
07:00 - 12:00, 13:15 - 17:00
Wed
07:00 - 12:00, 13:15 - 17:00
Thu
07:00 - 12:00, 13:15 - 17:00
Fri
07:00 - 12:00, 13:15 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.163.603
Founded
1976 · 50 years
Last commercial register change
December 11, 2023
Employees
21 to 50
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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