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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesFüllinsdorfGuldager (Schweiz) AG
Guldager (Schweiz) AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Guldager (Schweiz) AG supplies water treatment equipment and corrosion protection solutions for commercial and industrial applications. Products and services include softening, reverse osmosis, ultrafiltration, bacterial control, cathodic corrosion protection and after‑sales support.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered4
Water treatment
Solutions and equipment for commercial and industrial water treatment, including water softening, reverse osmosis, ultrafiltration, filtration, bacteria control, desalination and demineralisation.
Corrosion protection
Corrosion protection for hot-water cylinders, filter vessels, storage tanks and pipe systems using cathodic corrosion protection, electrolysis and catholysis.
After-sales service
Technical support after purchase with spare parts, repairs and ongoing optimisation measures for water treatment systems and corrosion protection systems.
Solutions
Custom end-to-end solutions in which standard products are combined for water treatment and corrosion-related applications.
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4.1/5

Guldager (Schweiz) AG

Trust & reputation

ranQ Trust Score of Guldager (Schweiz) AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Guldager (Schweiz) AG scores 60.0 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.60.024%
  • 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.45.610%
  • 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%
Guldager (Schweiz) 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%
Guldager (Schweiz) 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%
Guldager (Schweiz) AG scores 60.0 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 35.60.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Guldager (Schweiz) AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 5 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
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle45
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Schneckelerstrasse 20
4414 Füllinsdorf
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.734.279
Founded
1995 · 31 years
Last commercial register change
July 9, 2026
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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