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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesJoineryFrauenfeldMüller Fenster AG Frauenfeld
Müller Fenster AG Frauenfeld Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Müller Fenster AG is the manufacture and distribution of windows, including new construction, renovations, maintenance contracts and accessories. The company also offers services such as glass cleaning, ventilation and security and ecology consulting.

AI-generated
Offering

Products & services

Industry:Joinery
✓ Offered9
Windows
Custom-made window systems from our own production, including wooden windows, wood/metal windows and lift-and-slide doors, folding sliding doors and parallel sliding tilt-and-turn doors.
New construction and renovations
Window solutions for new construction and renovation, including complete replacement, advice on window systems, energy requirements, renovation in winter and support from the federal programme.
Service
Repairs for all window systems, broken glass, retrofitting, installation of cat and dog flaps, insect screens, privacy and sun protection, as well as window service.
Maintenance contract
Annual inspection and adjustment of windows, including alignment of window sashes, checking water drainage grooves and sealing joints, as well as inspection of light wells and insect screens.
Specialties
Window solutions for historic and listed buildings with modern insulation, preserved façade appearance, special fittings and a slender wooden window look.
Accessories
Accessories for windows and doors, in particular insect screens, privacy and sun protection, as well as complementary care solutions and cleaning sets.
Security
Anti-burglary window and patio door solutions with special fittings, lockable handles, drill-resistant actuators and laminated safety glass.
Window care
Instructions and products for window care, including ventilation, glass cleaning, cleaning sets and fittings, to extend the service life of windows.
Ecology
Ecological window consulting focused on wooden windows, living climate and sustainable building; refers to the ecological profile of wooden windows made from Central European softwood.
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4.1/5

Müller Fenster AG Frauenfeld

Trust & reputation

ranQ Trust Score of Müller Fenster AG Frauenfeld: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Müller Fenster AG Frauenfeld scores 68.6 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.59.024%
  • 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.70.510%
  • 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%
Müller Fenster AG Frauenfeld scores 83.6 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.83.012%
  • 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%
Müller Fenster AG Frauenfeld 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%
Müller Fenster AG Frauenfeld scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Müller Fenster AG Frauenfeld reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.1 out of 5 stars from 15 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
4.1
of 5

Aggregated from 15 reviews across all connected sources

Sources
GGoogle4.115
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Wespenstrasse 7
8500 Frauenfeld
Opening hours
Mon
07:30 - 11:30, 13:30 - 17:00
Tue
07:30 - 11:30, 13:30 - 17:00
Wed
07:30 - 11:30, 13:30 - 17:00
Thu
07:30 - 11:30, 13:30 - 17:00
Fri
07:30 - 11:30, 13:00 - 15:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-225.780.906
Founded
2017 · 9 years
Last commercial register change
March 28, 2025
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.85.03%
    • Full methodology

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