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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryIndustryGlass, Ceramics, Stone & Construction Materials IndustryWidnauSiya GmbH
Siya GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of SIYA GmbH is the development and production of precision optics components, in particular plan optics, spherical optics, sapphire materials and technical glasses, according to specific customer requirements for the European market.

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Offering

Products & services

Industry:Glass, Ceramics, Stone & Construction Materials Industry
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Siya GmbH

Prisms and plane-parallel optics
Prisms, prism systems, plane-parallel plates, substrates and windows to customer specifications, with or without coatings and microstructures, in regular or free forms.
Lenses, micro and ball lenses
Lenses, microlenses and ball lenses across different size ranges, available on request for aspherical lenses and designed for precise spherical optics.
Sapphire optics
Sapphire blanks, sapphire windows and sapphire prisms for optical or mechanical applications, optionally processed and in various dimensions.
Technical glass for touch applications
Technical glass in precise quality for touch applications, using float glass, B270, Borofloat or sapphire, including CNC machining, chemical tempering and coatings.
Blanks, pressed parts and filter glass
Blanks and semi-finished materials, pressed parts as well as filter glass; cutting to size, rounding, drilling, surface grinding, lapping and polishing for optical production.
Trust & reputation

ranQ Trust Score of Siya GmbH

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of October 2026

Siya 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%
Siya GmbH scores 83.0 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%
Siya GmbH 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%
Siya GmbH 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%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of October 2026.

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

Knowledge

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Location

Gässeliwies 13
9443 Widnau
Opening hours
Mon
24h
Tue
24h
Wed
24h
Thu
24h
Fri
24h
Sat
24h
Sun
24h

At a glance

Legal form
Limited Liability Company
UID
CHE-115.791.753
Founded
2010 · 16 years
Last commercial register change
May 4, 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.
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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