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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryRetail & CommerceWholesale - Food & Luxury ItemsDiepoldsauFritz Kuster
Fritz Kuster Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Fritz Kuster is a carpentry business offering windows, doors, shutters, gates, sun‑protection products and interior joinery. Services include professional installation, maintenance of windows and doors, emergency locksmith work and custom furniture production.

AI-generated
Offering

Products & services

Industry:Wholesale - Food & Luxury Items
✓ Offered12
Windows
Windows with insulation and soundproofing, in collaboration with Internorm, for new builds and renovations.
Doors
Doors for residential houses and apartments with design, stability and safety, with Internorm as a partner product.
Shutters
Facade shutters with aesthetic effect, functionality and durability, in collaboration with EHRET.
Roller shutters / Venetian blinds
Roller shutters and Venetian blinds with thermal, light and weather protection, manually or electrically controlled, with RUFALEX and roma systems.
Sun protection
Sun protection systems for outdoor areas, in various versions and with products from clauss Markisen.
Gates
Gates for houses, apartments and industry, including installation, service and maintenance, with products from Teckentrup.
Insect protection
Insect screens for windows, balcony doors and ventilation shafts, as well as anti-pollen screens for allergy sufferers.
Aluminium profiles
Standard and special aluminium profiles, corrosion-resistant, lightweight and stable, together with Alu Laufen.
Cat and dog doors
Cat and dog doors for free access in and out, including chip-controlled models.
Installation, service and maintenance
Installation of all products, service for windows and doors, and maintenance after installation.
Interior fit-out
All carpentry work for interior fit-out, including custom-made furniture such as tables, cabinets and chairs.
Lock service
24/7 door opening in case of lockout.
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4.5/5

Fritz Kuster

Trust & reputation

ranQ Trust Score of Fritz Kuster: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Fritz Kuster scores 96.1 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.94.924%
  • 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.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%
Fritz Kuster scores 78.5 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.55.07%
Fritz Kuster 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%
Fritz Kuster scores 2.9 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 35.2.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Fritz Kuster reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 5.0 out of 5 stars from 58 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 58 reviews across all connected sources

Sources
GGoogle558
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Mitteldorfstrasse 5
9444 Diepoldsau
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-107.292.040
Founded
1966 · 60 years
Last commercial register change
March 7, 1983
Employees
1 to 10
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.
67.0
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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