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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryCrafts & TradesMetalworkBernKarl Zimmermann AG
Karl Zimmermann AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Karl Zimmermann AG is a metal construction company working in metal and steel construction and stair building. Its products include balconies, railings, doors, canopies and glazing, and it also provides repair and maintenance services.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Metalwork
✓ Offered10
Metal construction
Metal construction for steel, aluminium and glass; staircases, railings, doors, canopies, covers, balcony glazing, conservatories and special solutions.
Repairs + service
Repairs, a maintenance service offering, as well as maintenance and care; operations by fitters with equipped vehicles, carried out on site as soon as possible.
Balconies
Balconies, balcony towers and raised parapets; designs with picket railings, privacy walls, escape ladders and roofs made of trapezoidal sheet metal.
Railings and handrails
Railings and handrails in various designs; including, among others, picket railings and railings with infills made of expanded metal.
Staircases
Metal construction staircases, also in combination with balconies and spiral staircases for conversions and new builds.
Doors - gates
Doors and gates for new builds, conversions and special requirements in metal construction.
Canopies and covers
Metal canopies and covers for buildings and entrances, also as part of conversions and renovations.
Balcony glazing / windbreak walls
Balcony glazing and windbreak walls for balconies and outdoor areas, also as privacy screening solutions.
Steel construction
Steel construction for structural metal construction work and individual building projects.
Special solutions
Special solutions in metal construction for specific requirements and non-standardised projects.
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4.1/5

Karl Zimmermann AG

Trust & reputation

ranQ Trust Score of Karl Zimmermann AG: 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.

Karl Zimmermann 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%
Karl Zimmermann 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%
Karl Zimmermann 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%
Karl Zimmermann AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Karl Zimmermann 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 November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Normannenstrasse 12
3018 Bern

At a glance

Legal form
Corporation
UID
CHE-101.338.117
Founded
1961 · 65 years
Last commercial register change
January 31, 2019
Employees
21 to 50

Active in 1 of 26 cantons

  • BEBern
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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