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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesSheet Metal WorkGrenchenDiener Aviation-Services AG
Diener Aviation-Services AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Diener Aviation-Services AG provides aircraft painting, sheet-metal and structural repair services, together with leather refurbishment, interior and exterior cleaning, polishing and sealing; the company also performs painting for yachts and boats. Work is carried out in an on-site paint and sheet-metal workshop, and the company states it uses environmentally sustainable products.

AI-generated
Offering

Products & services

Industry:Sheet Metal Work
✓ Offered5
Aircraft painting
Aircraft paintworks, painting work in the workshop in Grenchen, including surface preparation and sealing.
Structural repairs
Structural repairs on the aircraft skin and other sheet-metal and bodywork in the workshop.
Aircraft cleaning
Aircraft cleaning, inside and outside, including detailing, polishing and sealing of the aircraft.
Leather refurbishment
Leather refurbishment for aircraft cabins, repair and reconditioning of leather surfaces.
Yacht and boat painting
Painting and restoration work for motorboats and sailing yachts, including painting and varnishing work in Grenchen.
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4.2/5

Diener Aviation-Services AG

Trust & reputation

ranQ Trust Score of Diener Aviation-Services AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Diener Aviation-Services AG scores 71.3 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.73.524%
  • 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.67.110%
  • 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 Aviation-Services AG scores 85.5 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.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%
Diener Aviation-Services AG 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%
Diener Aviation-Services AG 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%
Qualifications+0.00

Diener Aviation-Services AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 13 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
4.6
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle4.613
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Flughafenstrasse 63
2540 Grenchen
Opening hours
Mon
07:00 - 18:00
Tue
07:00 - 18:00
Wed
07:00 - 18:00
Thu
07:00 - 18:00
Fri
07:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.967.409
Founded
1998 · 28 years
Last commercial register change
May 6, 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.
100.0
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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