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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureNetwork constructionSchönenbuchBirrer + Seiler AG
Birrer + Seiler AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Birrer + Seiler AG carries out pipeline construction for drinking water and natural gas networks. Its services include supply and connection lines, indoor installations, maintenance and temporary piping.

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Service area

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Products & services

Industry:Network construction
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Birrer + Seiler AG

✓ Offered3
Piping for drinking water
Supply lines, service lines, internal installations, maintenance and temporary works for drinking water; installation of common pipe systems as well as refurbishment and new connections.
Piping for natural gas
Supply lines, service lines, internal installations, maintenance and temporary works for natural gas; PE pipes, ductile systems, refurbishment and integration into the existing pipeline network.
One-stop service
Complete work for the renewal of water or gas service lines; one quotation, one point of contact, shorter construction time, and execution with partner companies.
Trust & reputation

ranQ Trust Score of Birrer + Seiler AG

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of November 2026

Birrer + Seiler 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%
Birrer + Seiler 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%
Birrer + Seiler AG scores 86.7 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).86.722%
Birrer + Seiler AG scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of November 2026.

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

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Location

Im Pfeiffensack 8
4124 Schönenbuch

At a glance

Legal form
Corporation
UID
CHE-105.194.455
Founded
1999 · 27 years
Last commercial register change
October 30, 2026
Employees
11 to 20

Active in 1 of 26 cantons · 2 municipalities

  • BLAllschwil
  • BLSchönenbuch
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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