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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureTimber Construction & CarpentryRomanshornGsell Fenster GmbH
Gsell Fenster GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Gsell Fenster GmbH manufactures wooden and wood–metal windows, lift-and-slide doors and supplies the Sirius window system. Products include energy-efficient (Minergie) variants, multiple sealing and security levels (RC1–RC2), and accessories such as insect screens, pleated blinds and cat flaps; the company also provides planning, installation, maintenance and repair services.

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Products & services

Industry:Timber Construction & CarpentryJoinery
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4.5/5

Gsell Fenster GmbH

✓ Offered4
Window production
Timber, timber-metal and Minergie windows in various designs, with energy-efficient insulation, slim profiles, security and acoustic protection options, and custom dimensions.
Lift-slide doors
Lift-slide doors made of timber and timber-metal as an addition to the window systems, with technical details and a suitable design in the Sirius programme.
Window service
Maintenance, repairs and adjustment work on window hardware, including follow-up, spare parts supply, and additional fittings such as insect screen rollers, pleated blinds, glass shelves and cat flaps.
Advisory and project planning
Support from project planning through to the finished product, with close customer communication, individual consultation and constructive solutions for special requirements.
Trust & reputation

ranQ Trust Score of Gsell Fenster GmbH: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Gsell Fenster GmbH scores 98.6 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.97.524%
  • 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.100.08%
Gsell Fenster GmbH scores 74.1 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.79.212%
  • 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%
Gsell Fenster GmbH 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%
Gsell Fenster GmbH 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

Gsell Fenster GmbH 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 128 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 128 reviews across all connected sources

Sources
GGoogle5128
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Deucherstrasse 13
8590 Romanshorn
Opening hours
Mon
06:45 - 12:00, 13:00 - 17:15
Tue
06:45 - 12:00, 13:00 - 17:15
Wed
06:45 - 12:00, 13:00 - 17:15
Thu
06:45 - 12:00, 13:00 - 17:15
Fri
06:45 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-273.819.190
Founded
2018 · 8 years
Last commercial register change
May 9, 2018
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.
88.0
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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