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

About the company

The core activity of Karl Sieber AG is the manufacture and sale of kitchens, cabinets, furniture, tables, interior fittings and electrical appliances, particularly in the fields of carpentry and kitchen construction.

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Products & services

Industry:Interior Construction
✓ Offered7
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4.2/5

Karl Sieber AG

Custom kitchens
Custom kitchens with in-house carcass production, freely selectable fronts and worktops; computer-based 3D planning and advice on materials, colours and kitchen appliances.
Custom cabinets
Custom cabinets for residential and commercial spaces; optimal use of room space, planning for different room situations and tailored cabinet solutions.
Custom furniture
Custom furniture for challenging floor plans, sloped ceilings and small rooms; bespoke joinery work and advice for furnishing living spaces.
Made-to-measure tables
Made-to-measure tables in the desired material, format and shape; custom production for dining tables and other table solutions.
Interior fit-out
Interior fit-out tailored to individual possibilities; advice, implementation of original ideas and execution of joinery work for rooms as desired.
Planning and 3D visualisation
Planning of kitchens and joinery work on the computer with three-dimensional display; viewing from all angles and adjustments during the planning phase.
Kitchen appliances
Kitchen appliances for bespoke kitchens; advice and selection of appliances such as V-ZUG, Electrolux, Miele, Franke, SIBIR, WESCO and other brands.
Trust & reputation

ranQ Trust Score of Karl Sieber AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Karl Sieber AG scores 71.2 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.76.824%
  • 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.58.610%
  • 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.70.08%
Karl Sieber AG scores 85.5 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%
Karl Sieber AG scores 83.3 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).83.322%
Karl Sieber AG scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Karl Sieber AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.8 out of 5 stars from 9 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
4.8
of 5

Aggregated from 9 reviews across all connected sources

Sources
GGoogle4.89
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Kientalstrasse 171
3722 Scharnachtal
Opening hours
Mon
07:00 - 12:00, 13:15 - 17:00
Tue
07:00 - 12:00, 13:15 - 17:00
Wed
07:00 - 12:00, 13:15 - 17:00
Thu
07:00 - 12:00, 13:15 - 17:00
Fri
07:00 - 12:00, 13:15 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-102.879.284
Founded
1991 · 35 years
Last commercial register change
December 27, 2024
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.
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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