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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryCrafts & TradesAir conditioningSamedanGiston AG
Giston AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Giston AG provides building services in heating, ventilation and plumbing. Its work includes planning, installing, maintaining and repairing heating, ventilation and plumbing systems, including heat pumps, ventilation systems and bathroom renovations.

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Presence

Service area

Offering

Products & services

Industry:Air conditioningHeating installer
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Giston AG

Plumber
✓ Offered3
Heating
Design, installation and maintenance of heating systems for new builds and renovations, including heat pumps, wood and pellet heating systems, room regulation and servicing.
Ventilation
Design, installation and maintenance of ventilation systems for new builds, controlled residential ventilation, commercial kitchen and restaurant ventilation, humidification and maintenance.
Plumbing
Design, installation and maintenance of sanitary installations for new builds and renovations, including bathroom refurbishments, alterations, maintenance and service work.
Trust & reputation

ranQ Trust Score of Giston AG: 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.

Giston AG 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%
Giston AG scores 92.3 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.82.07%
Giston 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%
Giston AG scores 9.4 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 35.9.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Giston AG 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

Via Chantunela 5
7503 Samedan

At a glance

Legal form
Corporation
UID
CHE-105.885.039
Founded
1982 · 44 years
Last commercial register change
December 10, 2024
Employees
21 to 50

Active in 1 of 26 cantons

  • GRGrisons
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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