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

About the company

The core activity of Keller Zargen AG is the manufacture and distribution of door frames, in particular steel door frames, chrome steel frames, rebate frames, sliding door frames, special frames and 4-sided frames, as well as the provision of services such as powder coating and technical consulting in the field of fire protection.

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Products & services

Industry:Metal Construction
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4.1/5

Keller Zargen AG

10
Steel door frames
Steel door frames for different profiles, layouts and dimensions; with a patented combination seal, high sound and thermal insulation, as well as made-to-measure individual and special fabrications.
Chrome steel door frames
Chrome steel door frames for elegant finishes with chemical resistance; suitable for higher hygiene requirements, for example in kitchens, clinics and dairies.
Plug-in door frames
Plug-in door frames, also called two-part steel door frames, for fast and clean installation; optionally finished coated and suitable for dry construction mounting.
Sliding door frames
Sliding door frames made of steel for wood and glass door leaves in various versions; implementation of own and customer-specific design ideas.
Custom door frames
Custom door frames to desired dimensions and special solutions; development and manufacturing for specific requirements in the company’s own research and development department.
Four-sided door frames
Four-sided door frames, also called window frames, as enclosed frames with glass; for viewing windows between rooms or to let in more light.
Combination seal
Patented combination seal for heavy and light doors; makes closing easier without compromising sound and thermal insulation.
Powder coating
Powder coating for steel door frames with primer and final coating in RAL or NCS colours; on request with an individual surface texture and protective packaging.
Technical consulting
Technical consulting by technical sales representatives in the West, Central, East and South regions; support regarding products and installation questions.
Service and customer service
Service and customer support after completion of the order for repairs, alterations, renovations and retrofits, in particular in the area of steel door frames.
Trust & reputation

ranQ Trust Score of Keller Zargen AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Keller Zargen AG scores 62.3 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.60.924%
  • 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.52.910%
  • 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 Zargen AG scores 94.3 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.90.07%
Keller Zargen 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 Zargen AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller Zargen AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.1 out of 5 stars from 7 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
4.1
of 5

Aggregated from 7 reviews across all connected sources

Sources
GGoogle4.17
★TrustpilotSoon
PProvenExpertSoon

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

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Location

St. Gallerstrasse 11
8353 Elgg

At a glance

Legal form
Corporation
UID
CHE-104.330.112
Founded
1998 · 28 years
Last commercial register change
September 17, 2025
Employees
51 to 100
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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