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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsSt. GallenKuster + Hager Ingenieurbüro AG St. Gallen
Kuster + Hager Ingenieurbüro AG St. Gallen Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Kuster & Hager encompasses engineering and architectural services, particularly in the fields of civil and structural engineering, water and environmental management, as well as real estate. The company also provides general contractor services and possesses a broad range of competencies in these areas.

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Products & services

Industry:Civil Engineering Firms
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3.9/5

Kuster + Hager Ingenieurbüro AG St. Gallen

✓ Offered
1
Wastewater treatment and sewerage technology
Operational consulting and optimization, operational analyses, financial and asset preservation planning, strategic planning, hydraulic and process engineering calculations, design and implementation of wastewater treatment plants.
Trust & reputation

ranQ Trust Score of Kuster + Hager Ingenieurbüro AG St. Gallen: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 100% · As of October 2026

Kuster + Hager Ingenieurbüro AG St. Gallen scores 49.8 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.68.224%
  • 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.17.610%
  • 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.35.08%
Kuster + Hager Ingenieurbüro AG St. Gallen scores 90.9 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.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%
Kuster + Hager Ingenieurbüro AG St. Gallen scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Kuster + Hager Ingenieurbüro AG St. Gallen scores 36.5 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 35.62.94%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

Kuster + Hager Ingenieurbüro AG St. Gallen reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 customer reviews. 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

May 20, 2024Media
Kuster+Hager-Gruppe feiert 70-Jahr-Jubiläum
leaderdigital.ch

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Location

Oberstrasse 222
9014 St. Gallen

At a glance

Legal form
Corporation
UID
CHE-105.920.836
Founded
1989 · 37 years
Last commercial register change
May 30, 2025
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.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.85.03%
    • Full methodology

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