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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesRepair of Consumer GoodsBiberistPianoworks Stefan M. Amstutz
Pianoworks Stefan M. Amstutz Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Pianoworks includes the professional maintenance and care of grand pianos and pianos, including: transport and relocation of grand pianos and pianos, tuning of grand pianos and pianos, repairs of grand pianos and pianos, including expert assessments and professional execution, and revisions of grand pianos and pianos, including detailed overhaul and maintenance.

AI-generated
Offering

Products & services

Industry:Repair of Consumer Goods
✓ Offered4
Piano tunings
Tuning of grand and upright pianos, including an assessment of the instrument's condition during the tuning.
Piano repairs
Professional repairs for grand and upright pianos, including expert assessments for damage to the action, strings, or case.
Piano overhauls
Overhauls of grand and upright pianos with detailed workmanship and experience with instruments from various manufacturers.
Transport
Coordination of transport and relocation of grand and upright pianos by specialized professionals.
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4.1/5

Pianoworks Stefan M. Amstutz

Trust & reputation

ranQ Trust Score of Pianoworks Stefan M. Amstutz: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Pianoworks Stefan M. Amstutz has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Pianoworks Stefan M. Amstutz 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%
Pianoworks Stefan M. Amstutz 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%
Pianoworks Stefan M. Amstutz scores 4.6 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 35.4.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Pianoworks Stefan M. Amstutz reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Location

Fabrikstrasse 17
4562 Biberist

At a glance

Legal form
Sole proprietorship
UID
CHE-115.112.772
Founded
2009 · 17 years
Last commercial register change
April 23, 2021
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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