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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesKaltbrunnOthmar Hämmerli AG
Othmar Hämmerli AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Hämmerli AG is the planning, execution and maintenance of sanitary and heating installations, including consulting and implementation of economic and ecological solutions for building technology, particularly in the areas of heating systems, sanitary facilities and water supply.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered3
Plumbing installations
Plumbing installations for new builds, conversions and for commercial and industrial sites; planning, installation and maintenance of systems for domestic hot water, rainwater, wastewater and bathroom solutions.
Heating installations
Heating installations for new builds, conversions and for commercial and industrial sites; planning, installation and maintenance of heating systems using oil, gas, wood and alternative energy systems.
Advisory on renewable energy and eco-friendly building services
Advisory on solar energy, air, water, geothermal energy and groundwater, as well as the use of recyclable materials and environmentally designed heating and bathroom solutions.
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4.1/5

Othmar Hämmerli AG

Trust & reputation

ranQ Trust Score of Othmar Hämmerli AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Othmar Hämmerli AG scores 66.5 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.72.524%
  • 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.49.510%
  • 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%
Othmar Hämmerli AG scores 89.3 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.70.07%
Othmar Hämmerli 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%
Othmar Hämmerli AG scores 4.6 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 35.4.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Othmar Hämmerli AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.7 out of 5 stars from 6 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
4.7
of 5

Aggregated from 6 reviews across all connected sources

Sources
GGoogle4.76
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Bahnhofstrasse 11
8722 Kaltbrunn

At a glance

Legal form
Corporation
UID
CHE-107.286.105
Founded
1981 · 45 years
Last commercial register change
October 14, 2024
Employees
11 to 20
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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