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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryIndustryGlass, Ceramics, Stone & Construction Materials IndustryRiehenSandwerk GmbH
Sandwerk GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Sandwerk GmbH is the manufacture and sale of glass objects, particularly through the application of sandblasting technology on glass. The company also offers courses and workshops where customers can learn the techniques of glassblowing and sandblasting. Additionally, the company operates an Open Studio where customers have the opportunity to admire and purchase the glass objects.

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Offering

Products & services

Industry:Glass, Ceramics, Stone & Construction Materials Industry
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3.9/5

Sandwerk GmbH

✓ Offered4
Glass art and glass objects
Glass creations and glass objects from the studio, including decorative individual pieces and seasonal work such as Christmas decorations, candle chapels, snowmen and ornaments.
Open studio
Open studio for glass enthusiasts with exchange, getting to know each other and active making; sales, advice, sandblasting and repairs are also possible on site.
Glassblowing and glassworking courses
Torch courses for beginners and advanced learners, turning beads and creating jewellery, decorating glass and sandblasting for children, as well as group events.
Custom events and group workshops
Individually arranged events for birthdays, weddings, team outings or corporate events, including materials and supervision in the studio.
Trust & reputation

ranQ Trust Score of Sandwerk GmbH: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

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Data basis 96% · As of October 2026

Sandwerk GmbH scores 60.5 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.72.124%
  • 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.40.910%
  • 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%
Sandwerk GmbH scores 77.2 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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%
Sandwerk GmbH 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%
Sandwerk GmbH scores 6.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.6.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Sandwerk GmbH reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 4.8 out of 5 stars from 4 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 4 reviews across all connected sources

Sources
GGoogle4.84
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Brünnlirain 4
4125 Riehen

At a glance

Legal form
Limited Liability Company
UID
CHE-143.293.348
Founded
2016 · 10 years
Last commercial register change
October 23, 2020
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.
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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