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
  • Partner program
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,837 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesOstermundigenGrossen Service GmbH
Grossen Service GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Grossen Service GmbH is the decalcification of boilers and pipes, both mechanically and chemically, as well as lime protection. The company offers specialized services in the following areas: Mechanical boiler decalcification, Chemical boiler decalcification, Chemical decalcification of pipes and toilets, Lime protection. The company focuses on the maintenance and upkeep of sanitary facilities and offers individual solutions for customers in the regions of Bern, Solothurn, Aargau, Lucerne, and Zurich.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
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

Grossen Service GmbH

✓ Offered4
Boiler descaling
Boiler descaling for private households, mechanical or chemical; removal of limescale deposits, cleaning of the system and improvement of efficiency, hot-water supply and service life.
Chemical descaling
Chemical descaling of pipes, plate heat exchangers and special systems to eliminate limescale buildup, pressure problems and loss of performance; including cleaning and restoring proper function.
Limescale protection
Limescale protection systems and water treatment with ion exchange as well as electrical and magnetic fields to prevent limescale deposits in water systems.
Chemical descaling of toilets
Chemical descaling of toilets including cleaning of the cistern; if necessary, replacement of the float valve and lift bell to restore flushing function.
Trust & reputation

ranQ Trust Score of Grossen Service GmbH: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Grossen Service GmbH scores 80.1 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.85.424%
  • 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.68.910%
  • 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.78.08%
Grossen Service GmbH scores 73.9 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.70.212%
  • 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%
Grossen Service GmbH 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%
Grossen Service GmbH scores 4.9 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 35.4.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grossen Service GmbH reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 14 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 14 reviews across all connected sources

Sources
GGoogle514
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

No knowledge articles yet

Once Grossen Service GmbH has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

Grossen Service GmbH in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank Grossen Service GmbH by reviews, experience and specialisations.

Is this your company?

Claim the company profile of Grossen Service GmbH to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Grubenstrasse 26
3072 Ostermundigen
Opening hours
Mon
07:15 - 17:00
Tue
07:15 - 17:00
Wed
07:15 - 17:00
Thu
07:15 - 17:00
Fri
07:15 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-460.846.391
Founded
2020 · 6 years
Last commercial register change
July 4, 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.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

    Similar companies

    SW
    Sanitär Weiss AG
    Ostermundigen
    LH
    Luma Haustechnik
    Ostermundigen
    DJ
    Daniel Jutzi AG
    Burgdorf
    MJ
    M. Jäggli Sanitär GmbH
    Müntschemier
    HS
    Hegg Sanitär AG
    Münchenbuchsee
    SK
    Schneider Kreienbühl AG
    Bern
    MK
    Markus Keller GmbH
    Gümligen
    FS
    Frei Sanitär Lyss AG
    Lyss