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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceRhäzünsDiener Oberflächenbehandlung AG
Diener Oberflächenbehandlung AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Diener Oberflächenbehandlung AG is a service company specializing in surface finishing. Its services include sand and dust blasting, chromium-free chemical pretreatment, powder coating, spray galvanizing and packaging and transport of coated parts.

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Products & services

Industry:Building Maintenance
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3.9/5

Diener Oberflächenbehandlung AG

5
Powder coating
Powder coating for steel, CNS and aluminium substrates, smooth or structured, for individual parts and industrial series; choice of colour and surface finish as desired.
Sand and dust blasting
Sand and dust blasting to remove rust, dirt, grease, scale and old coatings from metal surfaces; preparation for further processing and coating.
Chemical pretreatment
Chemical pretreatment for degreasing and formation of a conversion layer; chrome-free processes for optimum powder adhesion before coating.
Spray galvanizing
Spray galvanizing as corrosion protection with zinc wire sprayed onto sand-blasted workpieces; suitable also for very large parts.
Packaging and transport
Packaging work after coating as well as provision for pickup or transport; transports in Graubünden and in the St. Gallen Rhine Valley.
Trust & reputation

ranQ Trust Score of Diener Oberflächenbehandlung AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

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Data basis 96% · As of October 2026

Diener Oberflächenbehandlung AG scores 61.0 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.57.124%
  • 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.63.210%
  • 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.70.08%
Diener Oberflächenbehandlung AG scores 76.5 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.70.212%
  • 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%
Diener Oberflächenbehandlung AG 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%
Diener Oberflächenbehandlung AG scores 12.6 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 35.12.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Diener Oberflächenbehandlung AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 11 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
of 5

Aggregated from 11 reviews across all connected sources

Sources
GGoogle411
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Quadra 4
7403 Rhäzüns
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-420.449.138
Founded
2020 · 6 years
Last commercial register change
January 18, 2021
Employees
11 to 20
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.100.06%
  • 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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