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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsBaselHOLINGER AG
HOLINGER AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

HOLINGER AG is an engineering firm that develops solutions for the water cycle. The company provides multidisciplinary planning and consulting services across wastewater, civil engineering, digital design, energy, industry, geology, urban drainage, environment/sustainability, hydraulic engineering and water supply.

AI-generated
Offering

Products & services

Industry:Civil Engineering Firms
✓ Offered9
Wastewater
Planning, development and implementation of projects related to wastewater; full support from defining requirements to execution.
Civil engineering
Advisory, planning, development and execution of civil engineering projects; on-site support tailored to your needs throughout the project.
Energy
Planning, development and implementation of energy projects; solutions for the water cycle and other technical challenges related to energy.
Digital planning
Digital planning of projects, development of tailored solutions and technical support throughout the project.
Industry
Advisory, planning and support for industrial projects, with development of solutions tailored to specific needs.
Remediation
Remediation of projects and structures, including advice, solution development and on-site implementation.
Environment and sustainability
Environmental and sustainability solutions, with advice, planning and support for projects focused on people and the environment.
Hydraulic structures
Planning, development and support for hydraulic structures; technical solutions for the water cycle.
Water supply
Planning, development and implementation of water supply projects; technical support and tailored advice.
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3.9/5

HOLINGER AG

Trust & reputation

ranQ Trust Score of HOLINGER AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 100% · As of October 2026

HOLINGER AG scores 53.8 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.70.824%
  • 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.27.910%
  • 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%
HOLINGER AG scores 84.1 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%
HOLINGER 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%
HOLINGER AG scores 50.0 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 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

HOLINGER AG 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 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

June 30, 2026Media
«Het äs Gschmäckli»: Gemeindepräsidentin gibt Ehemann Bauaufträge
20min.ch

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Location

Malzgasse 20
4052 Basel
Opening hours
Mon
08:00 - 18:00
Tue
08:00 - 18:00
Wed
08:00 - 18:00
Thu
08:00 - 18:00
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-262.718.188
Founded
1993 · 33 years
Last commercial register change
October 10, 2019
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.
76.0
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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