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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior ConstructionTherwilHasler Fenster-Produktion AG
Hasler Fenster-Produktion AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Hasler Fenster-Produktion AG is a manufacturer of windows and doors offering production, sales, installation and after‑sales service for wood, wood‑metal and plastic product systems. The company manufactures in Switzerland, emphasises sustainable production across the product lifecycle and provides services such as repairs, adjustments and security‑fitting installation.

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Products & services

Industry:Interior Construction
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Hasler Fenster-Produktion AG

✓ Offered6
Windows
Wood windows, wood-metal windows, uPVC windows, uPVC-metal windows and renovation windows; also uPVC windows T81 and uPVC-metal windows TPA 81.
Doors
Wood doors, wood-metal doors, uPVC doors and custom-made aluminium doors; for entrance doors as well as other exterior doors with a focus on security, insulation and design.
Lifting sliding doors
Lifting sliding doors in wood, wood-metal lifting sliding doors, uPVC lifting sliding doors and uPVC-metal lifting sliding doors for large-format glazing and threshold-free transitions.
Customer service
Adjusting windows, lubricating hardware, repairs, installing pet flaps and fitting security fittings; also repairs to windows from other manufacturers.
Advice and planning for windows and doors
Personal advice when buying windows, choosing doors and selecting suitable solutions for new builds, renovation of older buildings, refurbishments, balcony doors and patio doors.
Responsible production
Sustainable production of windows and doors across the entire life cycle; raw material sourcing, manufacturing, installation, use, recycling and disposal.
Trust & reputation

ranQ Trust Score of Hasler Fenster-Produktion AG: 4.7 out of 5.0

Trust Score4.7/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Hasler Fenster-Produktion AG scores 95.8 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.94.324%
  • 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.95.08%
Hasler Fenster-Produktion AG scores 93.3 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.97.712%
  • 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%
Hasler Fenster-Produktion 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%
Hasler Fenster-Produktion AG scores 48.6 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 35.48.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Hasler Fenster-Produktion AG reaches a ranQ Trust Score of 4.7 out of 5.0 — rated «Excellent». The rating draws, among other things, on 5.0 out of 5 stars from 51 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 51 reviews across all connected sources

Sources
GGoogle551
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Oberwilerstrasse 73
4106 Therwil

At a glance

Legal form
Corporation
UID
CHE-436.944.975
Founded
2012 · 14 years
Last commercial register change
September 8, 2026
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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