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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureTimber Construction & CarpentryBazenheidKeller Fensterbau-Schreinerei AG
Keller Fensterbau-Schreinerei AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Keller Fensterbau-Schreinerei AG is the manufacture and distribution of windows, sliding doors and aluminum cladding, in particular wooden windows, wood/aluminum windows and sliding doors, as well as the provision of services in the field of window manufacturing and carpentry.

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Products & services

Industry:Timber Construction & CarpentryJoinery
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4.2/5

Keller Fensterbau-Schreinerei AG

Wood Processing & Sawmills
✓ Offered7
Wood/Aluminium windows
Wood/Aluminium windows for new builds, conversions and renovations; with a very high glass proportion, thermal insulation, sound insulation and burglar protection, wood on the inside and aluminium on the outside.
Wood windows
Wood windows for single-family homes, multi-family buildings, residential and public buildings, as well as for conversions and renovations; available with pivot, tilt, folding and other opening types.
Heritage preservation windows
Heritage preservation windows with narrow sash profiles for stylistically appropriate renovation of listed buildings; modern window technology, minimal sash width and an adapted central section.
Lift-and-slide doors
Lift-and-slide doors made of wood and wood/aluminium for large-area glazing; threshold-free design, large opening widths and various sash configurations.
Parallel sliding doors
Parallel sliding doors as a sliding door solution in the product range; listed alongside lift-and-slide doors and therefore part of the door range for modern glazing.
Aluminium cladding
Subsequent aluminium cladding on existing wooden windows; weather-resistant, maintenance-free exterior cladding with free choice of color and a short implementation time.
Window service
Window service, maintenance and repairs for all kinds of windows; replace glass, mill in seals afterwards, install tilt windows, anti-burglary fittings, cat flaps and insect protection roller blinds.
Trust & reputation

ranQ Trust Score of Keller Fensterbau-Schreinerei AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Keller Fensterbau-Schreinerei AG scores 70.0 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.70.224%
  • 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.63.210%
  • 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.78.08%
Keller Fensterbau-Schreinerei 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%
Keller Fensterbau-Schreinerei 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 Fensterbau-Schreinerei AG scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller Fensterbau-Schreinerei AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.5 out of 5 stars from 11 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
4.5
of 5

Aggregated from 11 reviews across all connected sources

Sources
GGoogle4.511
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Toggenburgerstrasse 13
9602 Bazenheid

At a glance

Legal form
Corporation
UID
CHE-100.999.032
Founded
1989 · 37 years
Last commercial register change
September 28, 2023
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.100.06%
  • 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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