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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesSpecialized Construction InstallationsEglisauZASAG AG
ZASAG AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Zasag AG is the execution of plumbing, flat roof work and sanitary and heating installations. The company thus offers services in the field of building technology and facility management.

AI-generated
Offering

Products & services

Industry:Specialized Construction Installations
✓ Offered5
Sheet metal works
Gutters, downpipes, facade and dormer cladding, chimney flashings, window sills and lightning protection systems; manufacturing of sheet metal parts, profiles, pipes as well as plastic and insulation components.
Flat roofing work
Sealing of bitumen and plastic roofs, consultation on product selection, fall protection, roof greening, terrace renovation and terrace coatings.
Sanitary installations
Planning and installation of sanitary facilities for residential developments, offices, industrial and public buildings, as well as single-family houses and apartments; advice on sanitary fixtures and accessories.
Heating and cooling systems
Planning and installation of heating and cooling systems for residential and work areas; selection of energy sources such as gas, oil, wood, district heating and solar technology, as well as heat distribution and climate systems.
Building services planning and consulting
Careful, practice-oriented planning and consulting for building services systems; technical, ecological and economic design as well as coordination between sanitary, heating and other trades.
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4.1/5

ZASAG AG

Trust & reputation

ranQ Trust Score of ZASAG AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

ZASAG AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
ZASAG AG scores 92.3 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.82.07%
ZASAG AG scores 83.3 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).83.322%
ZASAG AG scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ZASAG AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Location

Schaffhauserstrasse 37
8193 Eglisau

At a glance

Legal form
Corporation
UID
CHE-105.998.726
Founded
1985 · 41 years
Last commercial register change
September 22, 2026
Employees
21 to 50
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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