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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryRetail & CommerceJewellerOttenbachKoller & Koller GmbH
Koller & Koller GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Koller & Koller is the sale and consulting of jewelry, jewels and watches, including the manufacturing, repair and redesign of jewelry pieces as well as the sale of diamonds and other precious stones.

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Presence

Service area

Offering

Products & services

Industry:Jeweller
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4.1/5

Koller & Koller GmbH

✓ Offered5
Jewellery
Extensive range of jewellery, well-known brands and own creations; advice in-store.
Watches
Large selection of watches with personal advice at the point of sale.
2 Herzen Jewellery
Tailor-made bridal jewellery and wedding rings, 18- and 14-carat gold jewellery, solitaire rings, engagement rings, configurator and engraving.
Investment diamonds
Investment diamonds with price comparison and appointment booking.
Watch and jewellery service
Repairs, exchanges, engravings, redesigns and bespoke creations; watch servicing and repairs in the workshop.
Trust & reputation

ranQ Trust Score of Koller & Koller GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Koller & Koller GmbH 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.
x
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%
Koller & Koller GmbH scores 86.7 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.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.70.07%
Koller & Koller 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%
Koller & Koller GmbH scores 40.0 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 35.40.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Koller & Koller GmbH 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 November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Am Tobelbach 10
8913 Ottenbach

At a glance

Legal form
Limited Liability Company
UID
CHE-116.051.191
Founded
2010 · 16 years
Last commercial register change
January 16, 2017
Employees
11 to 20

Active in 1 of 26 cantons · 1 municipality

  • ZHOttenbach
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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