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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberGelterkindenHSK GmbH
HSK GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

HSK GmbH provides heating, plumbing and maintenance services. Its work includes planning and installing heating and plumbing systems, bathroom renovations, and servicing and repairing equipment such as boilers and water softeners.

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Service area

Offering

Products & services

Industry:Plumber
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4.0/5

HSK GmbH

8
Heating systems
Heating systems for heat pumps, district heating, gas and oil boilers; design, replacement and installation of heating systems.
Plumbing installations
Plumbing installations for water distribution, pipework, connections and fittings; work in laundry rooms, bathrooms and kitchens.
Bathroom renovation
Bathroom renovation with planning, consultation, installation and completion; bathroom, shower, fittings, ceramics, bathroom furniture and shower partitions.
Customer service and repair service
Customer service for maintenance, repairs, planning and advice for heating and plumbing systems; устранление of leaks and defects.
Heat pumps
Heat pumps for heating and domestic hot water, using air, groundwater or ground sources; also referred to as heat-pump boilers.
District heating
District heating connections and district heating systems for space heating and domestic hot water generation; with service, maintenance and repairs.
Water softening systems
Water softening systems to reduce limescale and hardness-forming substances; installation as well as softener inspection and maintenance.
Boilers
Boilers for domestic hot water, including heat-pump boilers, boilers with coil heat exchanger or plate heat exchanger and PV boilers; plus boiler inspection.
Trust & reputation

ranQ Trust Score of HSK GmbH: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of November 2026

HSK GmbH scores 59.7 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.73.124%
  • 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.35.310%
  • 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.50.08%
HSK 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%
HSK GmbH scores 86.7 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).86.722%
HSK GmbH scores 0.9 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 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

HSK GmbH reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 3 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Bleichiweg 11
4460 Gelterkinden

At a glance

Legal form
Limited Liability Company
UID
CHE-104.015.395
Founded
2002 · 24 years
Last commercial register change
November 3, 2021
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BLGelterkinden
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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