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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesRepair of Consumer GoodsZurichUlrike Dederer
Ulrike Dederer Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The company's core activity is the construction, restoration and servicing of violins and bows, particularly the manufacture of new violins and bows as well as the maintenance and repair of existing instruments.

AI-generated
Offering

Products & services

Industry:Repair of Consumer Goods
✓ Offered4
String instrument making
Violins, violas and cellos in the Cremonese tradition; new builds, copies, Baroque instruments as well as custom instruments tailored to the needs of musicians.
Restoration, repair and sound adjustment
Restoration, repair, sound adjustment and expertise for string instruments; with experience from historical instrument work and careful adaptation to playing and sound requirements.
Baroque instrument making
Baroque instruments and Baroque new builds as part of the workshop for historical and contemporary string instruments.
Copies
Copies of string instruments within the workshop offering, alongside new builds and Baroque instruments.
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4.1/5

Ulrike Dederer

Trust & reputation

ranQ Trust Score of Ulrike Dederer: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Ulrike Dederer 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%
Ulrike Dederer scores 72.7 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.86.512%
  • 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%
Ulrike Dederer scores 83.3 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).83.322%
Ulrike Dederer scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ulrike Dederer 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

Azurstrasse 17
8050 Zurich

At a glance

Legal form
Sole proprietorship
UID
CHE-167.865.063
Founded
2016 · 10 years
Last commercial register change
January 20, 2016
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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