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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesSpecialized Construction InstallationsReichenburgKeller + Bombana GmbH
Keller + Bombana GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Keller + Bombana GmbH encompasses the following areas: * Chimney sweeping services * Official combustion control (oil/gas/wood) * Chimney construction * Fire protection (sale and installation of fire protection articles such as fire extinguishers, fire blankets, smoke detectors, etc.) * Sale and installation of stoves (particularly chimney and pellet stoves) Thus, the company offers a comprehensive range of services and products related to chimneys, combustion control, and fire protection.

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Products & services

Industry:Specialized Construction Installations
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Keller + Bombana GmbH

✓ Offered6
Chimney sweeping
Chimney sweeping for oil and gas heating units, alkaline cleaning, maintenance and care of heating installations.
Official heating inspections
Official heating inspections for oil, gas and wood-fired heating systems in several municipalities in Schwyz and Glarus Nord.
Chimney construction and renovations
Chimney construction as well as renovation work for small and medium-sized chimney systems, including new builds and renovations in German-speaking Switzerland.
Fire protection
Fire protection for buildings and facilities in several municipalities in Schwyz, including responsibility for normal fire risk and advice on regulations.
Fireplaces and pellet stoves
Sale and installation of fireplaces and pellet stoves from RIKA, GANZ and ORANIER.
Fire safety products
Sale of fire safety products such as smoke detectors, fire extinguishers and fire blankets.
Trust & reputation

ranQ Trust Score of Keller + Bombana GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Keller + Bombana GmbH scores 64.3 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.67.124%
  • 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.52.910%
  • 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.70.08%
Keller + Bombana GmbH scores 86.7 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.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%
Keller + Bombana GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Keller + Bombana GmbH scores 22.9 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 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller + Bombana GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.4 out of 5 stars from 7 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
4.4
of 5

Aggregated from 7 reviews across all connected sources

Sources
GGoogle4.47
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Industriestrasse 11
8864 Reichenburg
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-444.694.852
Founded
2010 · 16 years
Last commercial register change
April 13, 2016
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.
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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