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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior ConstructionTherwilHasler Fenster AG
Hasler Fenster AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Hasler Fenster AG is a manufacturer of windows and doors, producing and supplying timber, timber‑aluminium and plastic windows and doors and offering installation and repair services. Its offerings include renovation windows, lift‑and‑slide doors, customer service and production practices focused on product lifecycle and sustainability.

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Offering

Products & services

Industry:Interior Construction
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Hasler Fenster AG

✓ Offered5
Windows
Wood windows, wood-metal windows, plastic windows, plastic-metal windows and renovation windows for new builds and renovations; also custom solutions such as T81 and TPA 81.
Doors
Wood doors, wood-metal doors, plastic doors and aluminium doors for new builds and replacements; including configuration of an aluminium door.
Lift-and-slide doors
Wood lift-and-slide doors, wood-metal lift-and-slide doors, plastic lift-and-slide doors and plastic-metal lift-and-slide doors for lots of natural light and views.
Customer service
Adjusting windows, lubricating fittings, repairs, installing pet flaps and mounting security fittings; also repairs to windows from other manufacturers.
Needs-based window consultation
Advice on security, burglary protection, sound insulation and thermal insulation for windows; support in selecting suitable windows for different installation situations.
Trust & reputation

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

Trust Score4.7/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Hasler Fenster 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 AG scores 93.8 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.92.512%
  • 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 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 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 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.

Knowledge

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Location

Oberwilerstrasse 73
4106 Therwil

At a glance

Legal form
Corporation
UID
CHE-339.001.590
Founded
2014 · 12 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.95.03%
    • Full methodology

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