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 · Imprint746,904 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberKirchberg SgG. Seiz AG
G. Seiz AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of G. Seiz AG is the planning, installation and renovation of heating, ventilation and sanitary systems, particularly in the area of controlled residential ventilation, pipeline construction, chimney construction and the conversion or renovation of sanitary facilities.

AI-generated
Presence

Service area

Offering

Products & services

Industry:PlumberBuilding installation
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
4.1/5

G. Seiz AG

✓ Offered4
Controlled apartment ventilation
Controlled apartment ventilation for residential buildings, focusing on the planning and installation of ventilation systems.
Sanitary installations – conversion and renovation
Conversion and renovation of sanitary installations, including work on existing sanitary systems.
Pipework construction
Pipework construction for building services systems and supplementary installations in the sanitary and ventilation sector.
Chimney construction
Chimney construction as a supplementary service in the field of building services and building installations.
Trust & reputation

ranQ Trust Score of G. Seiz AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

G. Seiz 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%
G. Seiz 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%
G. Seiz 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%
G. Seiz AG scores 5.7 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 35.5.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

G. Seiz 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 November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Knowledge

No knowledge articles yet

Once G. Seiz AG has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

G. Seiz AG in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank G. Seiz AG by reviews, experience and specialisations.

Is this your company?

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

Secure profile

Location

Schalkhusenstrasse 10
9533 Kirchberg Sg
Opening hours
Mon
06:45 - 12:00, 13:15 - 17:30
Tue
06:45 - 12:00, 13:15 - 17:30
Wed
06:45 - 12:00, 13:15 - 17:30
Thu
06:45 - 12:00, 13:15 - 17:30
Fri
06:45 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.804.495
Founded
1987 · 39 years
Last commercial register change
January 4, 2012
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SGKirchberg (SG)
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

    WS
    Wettler Sanitär & Heizung AG
    Buchs Sg
    KH
    Kisling Haustechnik GmbH
    Eichberg
    TL
    Tobler Lüftung + Klima AG
    Wattwil
    E2
    Energie 2000 Energiemanagement AG
    Rufi
    PA
    Pfister-Heizungen AG
    St. Gallen
    MS
    Max Schetter AG
    Wittenbach
    KW
    Kühne Wärmetechnik GmbH
    Schänis
    EI
    ETA Installationstechnik GmbH
    Au Sg