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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesHochdorfCoolStar AG
CoolStar AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

CoolStar AG supplies air conditioning systems, chilled‑water systems, heat pumps, ventilation units and dehumidifiers, including mobile units, split systems and multi‑split/VRF equipment. The company provides product catalogs and offers technical support and after‑sales service.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered4
Air-conditioning units
Mobile air-conditioning units, wall split air-conditioning systems, server air-conditioning units, wine cellar air-conditioning units, multi-split and one-split systems, as well as accessories for air-conditioning units.
Heat pumps
Air-to-air heat pumps, air-to-water split heat pumps, air-to-water compact heat pumps, heat pump boilers, as well as domestic hot water and stratified buffer tanks.
Ventilation systems
Ventilation systems with heat exchangers for fresh air supply, supply and extract ventilation of rooms, free cooling, as well as easy installation and maintenance.
Dehumidifiers
Dehumidifiers in sizes 12 + 20 litres, 38 + 50 litres and 40 + 50 litres for different room requirements.
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4.1/5

CoolStar AG

Trust & reputation

ranQ Trust Score of CoolStar AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

CoolStar AG scores 64.7 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.51.724%
  • 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.77.410%
  • 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.88.08%
CoolStar 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%
CoolStar 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%
CoolStar AG scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

CoolStar AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 3.9 out of 5 stars from 20 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
3.9
of 5

Aggregated from 20 reviews across all connected sources

Sources
GGoogle3.920
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Turbiweg 10
6280 Hochdorf

At a glance

Legal form
Corporation
UID
CHE-113.942.573
Founded
2007 · 19 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.
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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