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

About the company

The core activity of Gruezh AG is the planning, consulting, installation and maintenance of sanitary and heating systems, including a 24-hour emergency service.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered
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4.0/5

Gruezh AG

7
Building services design
Holistic planning of building services for HVACS, electrical and architecture; including CAD-based dimensioning, energy-efficiency concepts and coordination for new builds, renovations and infrastructure projects.
Heating installations
Heating installations for new builds and conversions; with heating load calculation, system selection, pipe networks and surface heating, heat transfer stations, renewable energy sources, maintenance and repair.
Sanitary installations
Sanitary installations for new builds and conversions, bathroom refurbishments and existing properties; with drinking water, wastewater and hot water systems, pipework, backflow prevention and barrier-free sanitary rooms.
Ventilation installations
Ventilation installations for residential and commercial properties; from planning and installation to controlled home ventilation, air distribution, exhaust of wet rooms and integration into building services.
Refrigeration installations
Refrigeration installations for room cooling, equipment protection and hygiene standards; with cold production, reversible heat pumps, chilled-water sets, surface cooling, condensate management and system integration.
Consulting
Consulting for sanitary, heating, ventilation and refrigeration; with on-site analysis, clarification of requirements, heating modernisation and development of energy-efficient overall concepts.
24h emergency service
24-hour emergency service for sanitary and heating systems; with fast response to water damage, burst pipes, blockages, heating failures and faults in control equipment or pumps.
Trust & reputation

ranQ Trust Score of Gruezh AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Gruezh AG scores 76.1 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.80.624%
  • 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.55.910%
  • 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%
Gruezh AG scores 59.7 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.39.612%
  • 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%
Gruezh 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%
Gruezh AG scores 17.1 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 35.17.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Gruezh AG 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 8 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
5
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle58
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Lättenstrasse 37
8952 Schlieren
Opening hours
Mon
24h
Tue
24h
Wed
24h
Thu
24h
Fri
24h
Sat
24h
Sun
24h

At a glance

Legal form
Corporation
UID
CHE-414.202.316
Founded
2024 · 2 years
Last commercial register change
March 7, 2024
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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