ranQ
ranQ
ranQ
DirectoryIndustriesPlacesKnowledgeComparisonsSoon
Sign inCheck visibility
ranQHSG Startup LabelRecognised by the
HSG Startup Label

The leading AI company directory, built to boost AI visibility.

DEENFRIT
Product
  • Pricing
  • Directory
  • Industries
  • Trust Score
Company
  • About
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesZurichKolb & Co AG
Kolb & Co AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Kolb & Co AG is a building services company offering sanitary, heating and solar systems together with planning, installation and maintenance services.

AI-generated
Offering

Products & services

Industry:Plumbing & Building ServicesRoofingSheet Metal Work
LeadhubOutbound Leads by COHAGA

Looking for direct email addresses and phone numbers?

Leadhub delivers verified contact details and decision-makers from over 750,000 Swiss companies — management, procurement, marketing, HR.

Discover Leadhub
4.2/5

Kolb & Co AG

✓ Offered3
Plumbing work
Plumbing work in new builds and existing buildings, planning and installation of cold and hot water supply, bathroom suites as well as bathroom and kitchen renovations.
Heating systems
Installation of heating systems as required, operationally safe and ecologically designed systems to meet individual wishes.
Service work
Service calls for clogged drain lines, dripping taps and failed heating systems; available around the clock with trained service technicians.
Trust & reputation

ranQ Trust Score of Kolb & Co AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Kolb & Co AG scores 70.7 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.57.924%
  • 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.81.910%
  • 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.95.08%
Kolb & Co 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%
Kolb & Co 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%
Kolb & Co 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

Kolb & Co AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.1 out of 5 stars from 24 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
4.1
of 5

Aggregated from 24 reviews across all connected sources

Sources
GGoogle4.124
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

No knowledge articles yet

Once Kolb & Co AG has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

Kolb & Co AG in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank Kolb & Co AG by reviews, experience and specialisations.

Is this your company?

Claim the company profile of Kolb & Co AG to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Blumenfeldstrasse 85
8046 Zurich
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.840.852
Founded
1983 · 43 years
Last commercial register change
December 20, 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

    Similar companies

    DM
    De Martino GmbH
    Zurich
    GN
    G. Nikollbibaj Sanitär Heizung GmbH
    Erlenbach Zh
    AA
    AQUA-Sanitär AG
    Riedikon
    NR
    Niedermann Ragosta GmbH
    Glattfelden
    GH
    Gisler Heizungen & Sanitär GmbH
    Nürensdorf
    ZO
    Züri Oberland Haustechnik GmbH
    Wetzikon Zh
    TK
    TK Kälin Sanitär GmbH
    Zurich
    MM
    M. Murati, Reparaturservice, Sanitär, Heizung
    Wolfhausen