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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesRepair of Consumer GoodsBaselMarkus Mahlstein Klaviere und Flügel
Markus Mahlstein Klaviere und Flügel Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of the company "Markus Mahlstein Klaviere und Flügel" is piano tuning, repair and the sale of pianos and grand pianos.

AI-generated
Offering

Products & services

Industry:Repair of Consumer Goods
✓ Offered4
Piano tuning
Piano tuning at home in the Basel-Stadt area; including travel, for new and old instruments.
Grand piano tuning
Grand piano tuning at home in the Basel-Stadt area; including travel, for new and old instruments.
Repairs of pianos and grand pianos
Repairs and restorations of pianos and grand pianos in our workshop in Basel, also for historical instruments and modern Steinway.
Instrument appraisals
Technical and market-based valuations and assessments of instruments for expert questions concerning the instrument.
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3.9/5

Markus Mahlstein Klaviere und Flügel

Trust & reputation

ranQ Trust Score of Markus Mahlstein Klaviere und Flügel: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Markus Mahlstein Klaviere und Flügel scores 56.6 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.70.824%
  • 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.27.910%
  • 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.50.08%
Markus Mahlstein Klaviere und Flügel 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%
Markus Mahlstein Klaviere und Flügel scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Markus Mahlstein Klaviere und Flügel scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Markus Mahlstein Klaviere und Flügel reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Turnerstrasse 32
4058 Basel
Opening hours
Mon
Closed
Tue
14:00 - 17:00
Wed
14:00 - 17:00
Thu
14:00 - 17:00
Fri
14:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-109.946.792
Founded
2002 · 24 years
Last commercial register change
December 30, 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.67.06%
  • 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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