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

About the company

E. Zimmermann AG manufactures wooden and wood‑metal windows for new construction and renovation and produces custom shapes such as round, angled, or oval windows. The company also supplies sliding doors and offers services including production, maintenance and repairs, glass replacement, burglary protection and insect screens.

AI-generated
Offering

Products & services

Industry:Joinery
✓ Offered10
Windows
Timber windows and timber-metal windows for new builds and renovations, including special shapes such as round, angled or oval.
Sliding doors
Sliding doors in timber-metal for use in residential and building applications.
Special windows
Special windows for specific requirements and customised window solutions.
Fire protection windows
Fire protection windows with fire safety requirements for relevant building and safety applications.
Timber-metal doors
Timber-metal doors as a complement to the window and façade range.
Production
Production of made-to-measure windows and doors, including manufacturing for individual projects.
Service / repairs
Service work and repairs on windows and doors.
Broken glass
Replacement and repair in case of broken glass on windows and doors.
Burglary protection
Security solutions for windows and doors to protect against burglary.
Insect protection
Insect protection solutions for windows and doors.
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4.1/5

E. Zimmermann AG

Trust & reputation

ranQ Trust Score of E. Zimmermann AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

E. Zimmermann AG scores 63.5 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.73.124%
  • 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.35.310%
  • 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.70.08%
E. Zimmermann 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%
E. 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%
E. Zimmermann AG scores 8.3 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 35.8.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

E. Zimmermann AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 3 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
5
of 5

Aggregated from 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Menzbergstrasse 46
6130 Willisau

At a glance

Legal form
Corporation
UID
CHE-101.789.460
Founded
1999 · 27 years
Last commercial register change
November 21, 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.
100.0
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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